# DesiToolz — Full Tools Catalog & API Reference

> Complete machine-readable index of all 100+ free online developer, document, converter, and productivity utilities.
> Base URL: https://desitoolz.com
> Privacy Model: 100% Client-Side In-Browser RAM Sandbox (Zero Remote Uploads)
> Contact: aimailforuse@gmail.com

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## Core System Architecture & Features

DesiToolz provides instant access to modern productivity utilities without account requirements, subscription paywalls, or file limits. All file data is held solely in local browser memory and wiped upon session close.

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## Categories & Complete Tool Index

### Study & Academics

- **[College & High School GPA Calculator](https://desitoolz.com/tools/gpa-calculator)**: Calculate weighted and unweighted cumulative semester GPA with honor roll status and target GPA scenario planner.
  - Key Features: 4.0 GPA scale, Credit weighted calculations, Target GPA planner, Dean's list honors
- **[APA, MLA & Chicago Citation Maker](https://desitoolz.com/tools/citation-generator)**: Generate formatted academic bibliography references and in-text parenthetical citations in APA 7, MLA 9, Chicago, Harvard, and IEEE.
  - Key Features: APA 7th & MLA 9th, In-text parenthetical citation, BibTeX compatible, 1-click copy
- **[Interactive Chemistry Periodic Table](https://desitoolz.com/tools/periodic-table)**: Visual interactive chemistry periodic table with element cards, electron configurations, atomic masses, and element family filters.
  - Key Features: All 118 elements, Electron configurations, Atomic mass & STP state, Chemical family color tags
- **[Linear Algebra Matrix Solver](https://desitoolz.com/tools/matrix-solver)**: Calculate 2x2 and 3x3 matrix determinants, matrix inverses, matrix multiplication, transpose, and matrix trace with step-by-step arithmetic.
  - Key Features: Determinant det(A), Matrix inverse A⁻¹, Matrix trace & transpose, Singularity validation
- **[Classical Mechanics Kinematics Solver](https://desitoolz.com/tools/physics-kinematics)**: Solve classical physics equations of motion for initial velocity, acceleration, displacement, and time elapsed.
  - Key Features: Equations of motion, Step-by-step substitution, Velocity & acceleration vectors, Displacement calculations

### Android Development

- **[Android App Icon Resizer & Mipmap Generator](https://desitoolz.com/tools/android-icon-resizer)**: Generate Android app icons in all standard densities (mdpi, hdpi, xhdpi, xxhdpi, xxxhdpi) and Google Play Store 512x512 with circular or squircle adaptive masks.
  - Key Features: Mipmap density presets, Squircle & circle masks, 512x512 Play Store asset, Batch PNG downloads
- **[AndroidManifest.xml Security & Permission Linter](https://desitoolz.com/tools/android-manifest-validator)**: Audit AndroidManifest.xml for exported activities, cleartext HTTP traffic vulnerabilities, dangerous permissions, and Google Play compliance warnings.
  - Key Features: Exported component security, Cleartext traffic check, Scoped storage auditing, Runtime permissions check
- **[Android ProGuard & R8 Rules Generator](https://desitoolz.com/tools/proguard-rules-generator)**: Generate clean ProGuard and R8 obfuscation and shrinking rules with 1-click presets for Retrofit, Gson, Room, Kotlin Coroutines, and Glide.
  - Key Features: Retrofit & Gson presets, Kotlin Coroutines rules, Model class preservation, Release build optimization
- **[Android Keystore Fingerprint & Key Hash Studio](https://desitoolz.com/tools/keystore-fingerprint)**: Compute Base64 App Signing Key Hashes for Facebook SDK, Google Sign-In, and Firebase from SHA-1 certificate fingerprints.
  - Key Features: Base64 key hash generation, Facebook login setup, SHA-1 hex normalization, Zero keystore upload
- **[Visual ADB Command Builder & Script Generator](https://desitoolz.com/tools/adb-command-builder)**: Generate Android Debug Bridge (ADB) commands for deep link intent testing, APK installation, package data clearing, and logcat filtering.
  - Key Features: Deep link intent tester, Logcat PID filter, Screenshot capture shell, APK install & clear flags

### Web Development

- **[Interactive CSS Flexbox Playground](https://desitoolz.com/tools/flexbox-playground)**: Visual interactive CSS Flexbox sandbox to test direction, justify-content, align-items, flex-wrap, and gap with live copyable CSS.
  - Key Features: Live interactive flex items, Justify & align controls, Gap & wrap sliders, Clean CSS export
- **[Visual 2D CSS Grid Layout Builder](https://desitoolz.com/tools/css-grid-builder)**: Design 2D CSS Grid layouts visually with customizable columns, rows, and gaps with instant CSS grid code generation.
  - Key Features: 1-6 column slider, 1-5 row slider, Gap spacing control, Clean CSS grid rules
- **[Modern CSS Glassmorphism Studio](https://desitoolz.com/tools/glassmorphism-studio)**: Generate modern frosted glass UI cards with backdrop-filter blur, border opacity, surface saturation, and custom box-shadows.
  - Key Features: Backdrop-filter blur, Fill & border opacity sliders, Corner radius control, Tailwind & CSS output
- **[Essential SEO & Social Graph Meta Tag Maker](https://desitoolz.com/tools/meta-tag-generator)**: Generate Open Graph, Twitter Cards, and Google Sitelinks HTML meta tags with character count monitors and live card previews.
  - Key Features: Open Graph protocol, Twitter Summary card, Character count safety, 1-click HTML copy
- **[HTML Entities Encoder & Decoder](https://desitoolz.com/tools/html-entity-encoder)**: Safely encode special characters, HTML markup tags, and symbols into HTML entities, or decode named entities back to plaintext.
  - Key Features: XSS sanitization helper, Named & decimal entities, Bidirectional decode/encode, Large text support

### Data Science & Automation

- **[Token Counter & Model API Cost Estimator](https://desitoolz.com/tools/token-counter)**: Estimate tokens and API pricing across OpenAI GPT-4o, Claude 3.5 Sonnet, Gemini 1.5 Pro, and Llama 3.1 for prompt budgets.
  - Key Features: Multi-model pricing presets, Token count approximation, Context window percentage, Cost per 1k invocations
- **[Structured Prompt Engineering Studio](https://desitoolz.com/tools/prompt-optimizer)**: Transform raw template requests into production-grade prompts formatted with XML tags, operational guardrails, and deterministic output specs.
  - Key Features: XML tag architecture, Persona & constraint builder, High accuracy guardrails, Deterministic formatting
- **[ML Classification Confusion Matrix & F1 Calculator](https://desitoolz.com/tools/confusion-matrix-calculator)**: Calculate classification metrics including Accuracy, Precision, Recall, F1-Score, and Specificity from 2x2 confusion matrix values.
  - Key Features: Precision & Recall, F1-Score calculation, Specificity metric, Interactive 2x2 grid
- **[Vector Cosine Similarity & Embedding Comparator](https://desitoolz.com/tools/cosine-similarity-calculator)**: Compute cosine similarity (-1.0 to 1.0), Euclidean distance, and dot products between high-dimensional vector embeddings.
  - Key Features: Cosine similarity score, L2 Euclidean distance, Dot product sum, Arbitrary vector length
- **[Vector Embedding L2 Normalizer](https://desitoolz.com/tools/embedding-normalizer)**: Normalize vector embedding arrays to unit length (L2 norm = 1.0) for vector search databases and cosine index matching.
  - Key Features: L2 vector unit scaling, Magnitude calculation, Pinecone / Qdrant compatible, Clean array output

### DevOps & Cloud

- **[Dockerfile Security Linter & Optimizer](https://desitoolz.com/tools/dockerfile-linter)**: Audit Dockerfile configurations for root user hazards, unpinned base images, cached package bloat, and secret leaks.
  - Key Features: Root container audit, Pinned image tag check, Secret leakage scanner, Multi-stage build advice
- **[Kubernetes Manifest Linter & Probe Checker](https://desitoolz.com/tools/k8s-yaml-validator)**: Verify Kubernetes deployment manifests for CPU/memory limits, liveness and readiness health probes, and label selectors.
  - Key Features: Resource limit verification, Liveness & readiness audit, MatchLabels validation, Pod spec safety
- **[Interactive Cron Expression Builder & Translator](https://desitoolz.com/tools/cron-expression-studio)**: Build and test 5-field cron schedule expressions with human natural-language translations and schedule previews.
  - Key Features: 5-field cron builder, Plain English explanation, Minute & hour controls, 1-click copy
- **[Nginx Reverse Proxy & SSL Config Studio](https://desitoolz.com/tools/nginx-config-builder)**: Generate production-ready Nginx configuration files with upstream proxies, Let's Encrypt SSL, Gzip, and WebSocket support.
  - Key Features: Reverse proxy upstream, Force SSL redirects, Gzip compression flags, WebSocket upgrades
- **[IPv4 Subnet & CIDR Range Calculator](https://desitoolz.com/tools/cidr-calculator)**: Calculate usable IPv4 host ranges, broadcast addresses, subnet masks, and total network capacity from any CIDR prefix.
  - Key Features: Network & broadcast calculation, Usable host IP range, Subnet mask conversion, Interactive CIDR slider

### Marketing & Social

- **[Meta & Instagram Feed Ad Preview Simulator](https://desitoolz.com/tools/meta-ad-truncation)**: Preview Facebook and Instagram mobile feed ads with character truncation cutoffs (125-char primary text, 27-char headline).
  - Key Features: 125-character cutoff preview, Headline truncation check, Mobile feed visual mockup, CTA button selector
- **[Campaign URL & UTM Parameter Builder](https://desitoolz.com/tools/utm-builder)**: Create clean, trackable marketing campaign URLs with Google Analytics UTM tags (source, medium, campaign, term, content).
  - Key Features: Google Analytics UTM tags, Automatic URL encoding, Preset marketing mediums, 1-click copy
- **[Email Subject Line & Spam Score Tester](https://desitoolz.com/tools/email-subject-tester)**: Test email subject lines for mobile truncation (45 characters), spam word triggers, and inbox open rate potential.
  - Key Features: Spam word detector, Mobile 45-character cutoff, Deliverability scoring, Preheader preview
- **[Multi-Platform Social Character Counter](https://desitoolz.com/tools/social-character-counter)**: Real-time post character counter for Twitter/X (280), LinkedIn (3,000), Threads (500), and Instagram captions with progress bars.
  - Key Features: Twitter 280 char monitor, LinkedIn 140 char cutoff, Visual progress bars, Instagram caption limit
- **[Marketing Headline Emotional Value Scorer](https://desitoolz.com/tools/headline-analyzer)**: Analyze blog post and ad headlines for word count balance, emotional power words, and click-through appeal.
  - Key Features: Power word detection, Length optimization scoring, Clickability suggestions, Real-time evaluation

### Learning & Focus

- **[Active Recall Spaced Flashcard Trainer](https://desitoolz.com/tools/flashcard-trainer)**: Interactive active recall flashcard deck with 3D flip cards, mastery tracking, and customized study sets.
  - Key Features: 3D card flip animation, Mastery scoring, Active recall workflow, Zero server sync
- **[SuperMemo SM-2 Spaced Repetition Calculator](https://desitoolz.com/tools/sm2-retention-calculator)**: Simulate the SuperMemo SM-2 spaced repetition algorithm to determine ideal memory interval schedules.
  - Key Features: Easiness Factor formula, Quality score (0-5), Next review day interval, Memory retention modeling
- **[Productivity Pomodoro Sprint Timer](https://desitoolz.com/tools/pomodoro-timer)**: 25-minute focus sprints and 5-minute restorative breaks with sprint streak tracking to maintain peak productivity.
  - Key Features: 25m focus & 5m break, Streak sprint counter, Audio chime alerts, Clean full-screen mode
- **[RSVP Rapid Serial Speed Reading Trainer](https://desitoolz.com/tools/speed-reading-trainer)**: Train rapid reading speeds from 200 to 800 WPM using Rapid Serial Visual Presentation with optimal focal point centering.
  - Key Features: 200-800 WPM slider, Optimal Recognition Point (ORP), Custom passage loader, Zero eye saccades
- **[Cornell Note-Taking System Studio](https://desitoolz.com/tools/cornell-notes-generator)**: Organize study notes into Cornell cues, lecture notes, and summaries with 1-click Markdown and print export.
  - Key Features: Cue column & questions, Detailed note-taking pane, Synthesis summary box, Markdown file export

### Formula Execution

- **[Scientific Math & Expression Evaluator](https://desitoolz.com/tools/math-evaluator)**: Evaluate complex scientific math expressions including trigonometry, logarithms, powers, and square roots.
  - Key Features: Trig (sin, cos, tan), Square roots & powers, Log & ln functions, Precision decimal output
- **[Loan EMI & Amortization Calculator](https://desitoolz.com/tools/emi-loan-calculator)**: Calculate monthly loan EMI, total interest payable, and total loan cost across customizable tenures and interest rates.
  - Key Features: Monthly EMI breakdown, Cumulative interest cost, Principal vs interest, Annual tenure planner
- **[Descriptive Statistics & Standard Deviation Solver](https://desitoolz.com/tools/statistics-calculator)**: Compute Mean, Median, Variance (σ²), and Standard Deviation (σ) from arbitrary comma-separated numerical datasets.
  - Key Features: Mean & Median, Sample & pop variance, Standard deviation (σ), Dataset range & min/max
- **[Boolean Logic Truth Table Solver](https://desitoolz.com/tools/truth-table-solver)**: Generate complete truth tables for boolean logic operations (AND, OR, XOR, NAND, NOR) with input states.
  - Key Features: AND, OR, XOR, NAND, NOR, Binary 0/1 representation, Truth condition evaluation, Tabular output
- **[2D / 3D Geometry Area & Volume Solver](https://desitoolz.com/tools/geometry-solver)**: Solve Area, Perimeter, Surface Area, and Volume for circles, cylinders, spheres, and rectangular prisms.
  - Key Features: 2D area & perimeter, 3D volume calculations, Cylinder & sphere formulas, Instant dimension updates

### Virtual Lab & Science

- **[Digital Electronics Logic Gate Simulator](https://desitoolz.com/tools/logic-gate-simulator)**: Interactive virtual digital electronics breadboard with logic gates (AND, OR, NAND, NOR, XOR) and live LED output.
  - Key Features: Toggle input switches, TTL 74LS chip simulation, Illuminated output LED, AND/OR/XOR/NAND/NOR
- **[Ohm's Law & DC Electrical Circuit Lab](https://desitoolz.com/tools/ohms-law-lab)**: Simulate DC circuits with Voltage and Resistance sliders to calculate Current (I = V/R), Power (P = VI), and filament glow.
  - Key Features: Voltage & Resistance sliders, Current in mA and Amps, Thermal power dissipation, Dynamic filament glow
- **[Physics Optics Ray & Snell's Law Lab](https://desitoolz.com/tools/optics-ray-lab)**: Simulate light refraction across media with Snell's Law, refractive index controls, and total internal reflection.
  - Key Features: Snell's law calculation, Total internal reflection (TIR), Refractive index adjustment, Angle of refraction
- **[Web Audio Tone Synthesizer & Frequency Lab](https://desitoolz.com/tools/audio-oscillator-lab)**: Generate pure audio tones with sine, square, sawtooth, and triangle waveforms using the Web Audio API (100 - 1200 Hz).
  - Key Features: Web Audio API synthesizer, Sine, Square, Saw, Triangle, 100 Hz to 1200 Hz slider, Zero audio latency
- **[Optical Light Wavelength & Photon Energy Lab](https://desitoolz.com/tools/color-spectrum-lab)**: Explore visible light wavelengths (380 - 750 nm) and compute photon energy in electron-volts (eV) with RGB approximation.
  - Key Features: 380 - 750 nm spectrum slider, Photon energy in eV, RGB hex approximation, Interactive canvas visual
- **[Classical Mechanics Projectile Motion Lab](https://desitoolz.com/tools/projectile-motion-lab)**: Simulate projectile trajectory, apex height, total flight time, and range under Earth, Moon, and Mars gravity.
  - Key Features: Launch velocity & angle (θ), Earth, Moon & Mars gravity, Max height & flight time, Total trajectory range

### Typing Games

- **[Falling Words Cascade Arcade Game](https://desitoolz.com/tools/falling-words-game)**: Arcade typing game: destroy words falling down the screen by typing them accurately before you run out of lives.
  - Key Features: Real-time falling words, 3 hearts health system, Score multiplier, Arcade canvas physics
- **[Programmer Code Typing Sprint Race](https://desitoolz.com/tools/code-typing-race)**: Race against the clock typing real JavaScript, Python, and TypeScript code snippets with live syntax highlighting.
  - Key Features: Real code snippet syntax, Real-time WPM calculation, Character error coloring, Bracket & symbol training
- **[Typing Ninja Reflex & Combo Game](https://desitoolz.com/tools/typing-ninja)**: Fast-paced ninja typing reflex game: type flashing words rapidly to build combo multipliers and high score streaks.
  - Key Features: Combo multiplier streaks, Reflex prompt flashes, Fast arcade tempo, Score progression
- **[Word Scramble Anagram Typing Puzzle](https://desitoolz.com/tools/word-scramble-typing)**: Unscramble technology and science anagrams and type the correct answer to sharpen spelling speed.
  - Key Features: Scrambled anagrams, Instant answer check, Puzzle progression, Spelling accuracy training

### Typing Test

- **[60-Second Real-Time Typing Speed Test](https://desitoolz.com/tools/typing-speed-test)**: Benchmark your typing speed in 60 seconds with live WPM, accuracy percentage, and mistake tracking.
  - Key Features: 60-second timer countdown, Live WPM & accuracy %, Character-level error tracking, Passage progress view
- **[Developer Code Typing Benchmark](https://desitoolz.com/tools/code-typing-benchmark)**: Evaluate software engineering typing speed on complex brackets, braces, arrows, and operator symbols.
  - Key Features: Brackets & symbols test, TypeScript snippet benchmark, Error rate tracking, Developer speed percentile
- **[Blind Touch Typing Discipline Test](https://desitoolz.com/tools/blind-typing-test)**: No-backspace touch typing challenge that forces forward momentum and finger discipline for true accuracy.
  - Key Features: Backspace key disabled, Uncorrected error tracking, Muscle memory training, Pure forward typing
- **[Long-Form Paragraph Typing Speed Test](https://desitoolz.com/tools/paragraph-typing-test)**: Assess long-form endurance typing on multi-sentence literature and academic paragraphs with word count metrics.
  - Key Features: Multi-sentence endurance, Word flow analysis, Completion percentage, Clean minimal canvas

### Oracle Integration (OIC)

- **[Oracle Integration Cloud (OIC) XSLT Map Studio](https://desitoolz.com/tools/oic-xslt-generator)**: Generate XSLT 1.0 and 2.0 mapping templates for Oracle Integration Cloud integrations with schema loops and header mappings.
  - Key Features: XSLT 2.0 template generator, OIC namespace mappings, For-each row looping, 1-click XSL file copy
- **[OIC Integration Fault Object Analyzer](https://desitoolz.com/tools/oic-fault-debugger)**: Analyze Oracle Integration Cloud JSON fault objects (OIC-VAL, timeout, NXSD translation errors) with remediation advice.
  - Key Features: Fault code categorization, NXSD translation checks, Timeout troubleshooting, Security credential diagnosis
- **[XPath 1.0 & 2.0 XML Expression Evaluator](https://desitoolz.com/tools/xpath-evaluator)**: Evaluate XPath expressions against XML documents to verify integration node extractions and condition predicates.
  - Key Features: DOM XPath evaluation, Node predicate filtering, Text content extraction, Instant XML evaluation
- **[Oracle Fusion ERP REST Query Builder](https://desitoolz.com/tools/oracle-erp-query-builder)**: Construct filter queries (?q=) for Oracle Fusion ERP Cloud REST APIs (Invoices, GL, PO, Customers) with valid operators.
  - Key Features: Oracle ERP ?q= filter syntax, eq, gt, lt, like operators, Pagination limit params, 1-click URL copy
- **[Oracle Visual SQL & BIP Bursting Query Builder](https://desitoolz.com/tools/oracle-query-builder)**: Visual query builder for Oracle Database and Oracle ERP with drag-and-drop table canvas, foreign key visual joins, BI Publisher bursting path control, and in-browser mock data execution.
  - Key Features: Interactive drag-and-drop table canvas, Visual PK / FK highlighted relationships & joins, Oracle BI Publisher (BIP) Bursting Query generator, Custom server bursting path & file formula configuration, In-browser mock data execution & CSV export

### AWS Cloud

- **[Visual AWS IAM Policy JSON Generator](https://desitoolz.com/tools/aws-iam-policy-builder)**: Build least-privilege AWS IAM policies visually for S3, DynamoDB, SQS, Lambda, and Secrets Manager with clean JSON export.
  - Key Features: S3, DynamoDB, SQS, Lambda, Least-privilege permission picker, Allow / Deny statements, Valid IAM policy JSON
- **[AWS S3 Bucket Policy & TLS Security Builder](https://desitoolz.com/tools/aws-s3-policy-builder)**: Generate Amazon S3 bucket policies enforcing HTTPS TLS (aws:SecureTransport) and public read permissions with zero JSON syntax errors.
  - Key Features: Enforce HTTPS / TLS condition, Public GetObject policy, Bucket ARN formatting, 1-click policy copy
- **[AWS EventBridge & CloudWatch 6-Field Cron Builder](https://desitoolz.com/tools/aws-eventbridge-cron)**: Construct 6-field cron expressions for AWS EventBridge and CloudWatch Rules with the mandatory ? wildcard validation.
  - Key Features: 6-field AWS cron format, EventBridge ? wildcard rule, Year and Day-of-week fields, 1-click copy
- **[AWS DynamoDB AttributeValue Marshaler & Unmarshaler](https://desitoolz.com/tools/aws-dynamodb-unmarshaler)**: Convert AWS DynamoDB raw typed JSON ({ S, N, BOOL, L, M }) into clean JavaScript JSON and back with zero data loss.
  - Key Features: S, N, BOOL, L, M unmarshaling, Nested map & list parsing, Bidirectional conversion, Fast local execution

### PDF & Documents

- **[PDF Merger & Combiner](https://desitoolz.com/tools/pdf-merger)**: Merge multiple PDF documents into a single organized file in seconds with visual page reordering.
  - Key Features: Unlimited files, Drag & drop reordering, No watermarks, Instant download
- **[Online PDF Annotator](https://desitoolz.com/tools/pdf-editor)**: Add text, shapes, highlights, drawing annotations, and page notes directly on your PDF pages.
  - Key Features: Add text & annotations, Highlighter & draw tools, Form filler, Free vector output
- **[PDF File Compressor](https://desitoolz.com/tools/compress-pdf)**: Shrink PDF file size up to 80% while retaining crystal-clear vector text and readability.
  - Key Features: Custom compression ratio, Lossless optimization, Fast local processing, Privacy assured
- **[PDF Splitter & Page Extractor](https://desitoolz.com/tools/pdf-splitter)**: Split specific page ranges or extract individual pages from large PDF books and reports.
  - Key Features: Extract custom ranges, Split every N pages, Burst all pages, Zip download
- **[PDF Password Encrypt & Lock](https://desitoolz.com/tools/pdf-protect)**: Protect confidential PDFs with standard AES password encryption and permission locks.
  - Key Features: AES encryption, Disable printing/copying, Client-side processing, Zero logs stored
- **[PDF Sign & Signature Stamp](https://desitoolz.com/tools/pdf-sign)**: Draw or insert electronic signatures and date stamps onto contracts and agreements.
  - Key Features: Draw or upload signature, Date stamp & initials, Client-side security, Quick download
- **[LinkedIn & Instagram PDF Carousel Studio](https://desitoolz.com/tools/carousel-studio)**: Transform Markdown outlines into high-converting 1080x1350 multi-page PDF carousels. Designer themes, author branding ribbon, zero watermarks, and instant client-side PDF export.
  - Key Features: Markdown-to-slide automatic text reflow, 1080x1350 portrait (4:5) LinkedIn/IG format, 4 curated designer themes with auto-typography, Author avatar and handle personal branding ribbon, 1-click multi-page vector PDF download, Zero watermarks & zero server uploads

### Image & Graphics

- **[QR Code Generator & Styler](https://desitoolz.com/tools/qr-generator)**: Create customizable QR codes for links, Wi-Fi, text, and business cards with custom colors and logo embedding.
  - Key Features: High-res PNG & SVG, Custom colors & margins, Wi-Fi & URL templates, 100% Free & instant
- **[Lossless Image Compressor](https://desitoolz.com/tools/image-compressor)**: Compress JPG, PNG, and WebP images up to 85% directly in your browser without quality loss.
  - Key Features: Batch compress files, Custom quality slider, Side-by-side preview, Zero server uploads
- **[Canvas Photo Editor & Cropper](https://desitoolz.com/tools/photo-editor)**: Crop, rotate, flip, adjust brightness, contrast, saturation, and apply color filters to photos.
  - Key Features: Aspect ratio presets, Brightness & contrast, Rotate and flip, Export WebP/PNG/JPG
- **[Universal Image Format Converter](https://desitoolz.com/tools/webp-converter)**: Convert between PNG, JPG, WebP, GIF, and BMP formats instantly without installing desktop software.
  - Key Features: Supports PNG, JPG, WebP, Preserves transparency, Batch conversion, Instant zip export
- **[SVG Vector to High-Res PNG](https://desitoolz.com/tools/svg-to-png)**: Render scalable SVG vectors into crisp high-DPI PNGs or JPGs at custom width and height resolutions.
  - Key Features: Custom dimensions up to 4K, Transparent background, Font rendering support, Instant export
- **[Bulk Image Resizer & Scaler](https://desitoolz.com/tools/image-resizer)**: Resize multiple photos by percentage or exact pixel dimensions while maintaining original aspect ratios.
  - Key Features: Exact pixels or percentage, Maintain aspect ratio, Batch download zip, Local browser speed
- **[In-Browser Video Trimmer](https://desitoolz.com/tools/video-trimmer)**: Lossless video trimming and bug clip cropping using native WebCodecs and client-side processing.
  - Key Features: Lossless stream-copy trimming, MP4 10s clip render, SharedArrayBuffer multi-threading test, Zero watermark export
- **[YouTube Shorts Safe Zone & UI Overlay Tester](https://desitoolz.com/tools/shorts-safe-zone)**: Preview vertical 9:16 videos with pixel-accurate YouTube Shorts, Instagram Reels, and TikTok overlays. Detect subtitle hazards and export proof snapshots in browser.
  - Key Features: Pixel-accurate Shorts/Reels/TikTok overlays, Automated safe zone violation scanner, 9:16, 19.5:9, 20:9 device aspect simulators, 1080x1920 proof snapshot export, Zero cloud uploads

### Data & Converters

- **[CSV to Excel (XLSX) Converter](https://desitoolz.com/tools/csv-to-excel)**: Convert raw CSV or TSV data into clean, formatted Microsoft Excel sheets with automatic column types.
  - Key Features: Auto-detect delimiter & encoding, Supports 500k+ rows, Styled table formatting, Instant download
- **[JSON to CSV / Excel Table](https://desitoolz.com/tools/json-to-csv)**: Flatten complex nested JSON structures and API responses into clean tabular CSV spreadsheets.
  - Key Features: Nested object flattening, Array expansion, Paste JSON or upload file, Live table preview
- **[Excel (XLSX) to Clean PDF](https://desitoolz.com/tools/excel-to-pdf)**: Turn spreadsheets into print-ready, beautifully paginated PDF documents with orientation controls.
  - Key Features: Fit-to-page scaling, Landscape / Portrait mode, Formulas calculated, Preserve formatting
- **[Markdown to HTML / Text](https://desitoolz.com/tools/markdown-to-html)**: Render GitHub Flavored Markdown with tables, checklists, and code formatting into clean HTML.
  - Key Features: GFM table support, Checklists & code blocks, Instant copy HTML, Export clean file
- **[XML to JSON & JSON to XML](https://desitoolz.com/tools/xml-to-json)**: Bidirectional converter between XML and JSON formats with attribute parsing and clean formatting.
  - Key Features: Syntax validation, Clean indented output, Handles large payloads, One-click copy
- **[Universal Engineering Unit Converter](https://desitoolz.com/tools/unit-converter)**: Instant conversion across 200+ units: data storage, speed, pressure, temperature, power, and length.
  - Key Features: 200+ unit conversions, High-precision decimals, Offline capable, Search-first UI

### Developer & Code

- **[JSON Formatter & Validator](https://desitoolz.com/tools/json-formatter)**: Beautify, validate, fix, and explore complex JSON data with error highlights and collapsible views.
  - Key Features: Collapsible JSON tree, Syntax error highlighter, Minify & format, Safe client-side execution
- **[Base64 Encoder & Decoder](https://desitoolz.com/tools/base64-tool)**: Encode and decode strings, images, and binary files to and from Base64 with UTF-8 and URL-safe modes.
  - Key Features: URL-safe Base64 mode, Image to DataURI generator, File to Base64, Instant copy to clipboard
- **[Cryptographic Hash Generator](https://desitoolz.com/tools/hash-generator)**: Generate SHA-256, SHA-512, MD5, and SHA-1 hashes with instant verification and checksums.
  - Key Features: SHA-256 / SHA-512 / MD5, File checksum verification, Quick compare tool, Zero server roundtrips
- **[Regex Playground & Matcher](https://desitoolz.com/tools/regex-tester)**: Test regular expressions with real-time match highlighting, group capturing, and common regex cheatsheets.
  - Key Features: Real-time regex matcher, Regex cheat sheet library, Capture groups breakdown, Flag options
- **[SQL Beautifier & Query Formatter](https://desitoolz.com/tools/sql-formatter)**: Format unreadable SQL queries across MySQL, PostgreSQL, SQLite, and Snowflake into clean syntax.
  - Key Features: PostgreSQL, MySQL, SQLite, Keyword capitalization, Indentation rules, Minifier mode
- **[UUID / GUID Generator (v4, v7)](https://desitoolz.com/tools/uuid-generator)**: Generate bulk cryptographically secure UUID v4, timestamp-ordered UUID v7, and NanoIDs in one click.
  - Key Features: UUID v4 & v7 (time-sorted), Bulk generation (up to 1,000), Uppercase / Lowercase format, One-click copy
- **[Strong Password & Passphrase Generator](https://desitoolz.com/tools/password-generator)**: Generate high-entropy cryptographically secure passwords and passphrases with custom length and symbols.
  - Key Features: Up to 64 chars, Entropy meter, Symbols & numbers toggle, One-click instant copy
- **[Text & Code Diff Comparator](https://desitoolz.com/tools/diff-checker)**: Compare two text blocks or code files side-by-side with line-by-line added and modified difference highlights.
  - Key Features: Side-by-side diff, Line additions & deletions, Case sensitivity support, Zero server logs
- **[JWT Token Debugger & Inspector](https://desitoolz.com/tools/jwt-debugger)**: Decode and inspect JSON Web Tokens with parsed header, claims payload, and token expiration countdown.
  - Key Features: Header & payload decoder, Expiration audit, Claims viewer, Client-side security
- **[Lorem Ipsum Dummy Text Generator](https://desitoolz.com/tools/lorem-ipsum)**: Generate clean placeholder dummy text by paragraphs, sentences, or words with optional HTML tag wrapping.
  - Key Features: Paragraphs, sentences, words, Wrap <p> tags, Instant copy, Custom length
- **[HEX, RGB, HSL Color Converter](https://desitoolz.com/tools/color-converter)**: Interactive color picker and bidirectional converter between HEX, RGB, HSL, CMYK, and WCAG contrast check.
  - Key Features: HEX, RGB, HSL, CMYK, WCAG contrast rating, CSS variables export, Visual color swatch
- **[URL Encoder, Decoder & Query Parser](https://desitoolz.com/tools/url-encoder)**: Encode and decode URI components, parse query strings, and extract key-value parameter tables.
  - Key Features: URI component encoding, Query string table parser, Bidirectional toggle, One-click copy
- **[HAR Secret & PII Scrubber](https://desitoolz.com/tools/har-scrubber)**: Sanitize HTTP Archive (.har) logs before sharing with vendor support. Scrub cookies, bearer tokens, passwords, and API keys with correlation-preserving hashing.
  - Key Features: Correlation-preserving hashing, Header & cookie sanitization, JSON body secret scrubbing, 100% in-browser memory
- **[Webhook HMAC Signature Debugger](https://desitoolz.com/tools/webhook-hmac-debugger)**: Verify and debug HMAC-SHA256 webhook signatures for Stripe, GitHub, Shopify, Slack, Twilio, and Razorpay using local Web Crypto.
  - Key Features: Stripe, GitHub & Shopify presets, CRLF line ending checks, Timestamp drift detection, Next.js & Python middleware snippets
- **[Log & Stack Trace Secret Masker](https://desitoolz.com/tools/log-secret-masker)**: Anonymize production stack traces, terminal logs, and connection strings before sharing in public bug trackers, ticketing systems, or GitHub Issues.
  - Key Features: 50+ developer secret patterns, Deterministic pseudonymization, Sanitized context retention, Reversible session map
- **[SQLite Database Explorer](https://desitoolz.com/tools/sqlite-viewer)**: Inspect, query, and diff SQLite databases directly in your browser with zero file uploads and instant CSV export.
  - Key Features: In-browser SQLite engine, Table schema inspector, SQL query runner, CSV export file integrity, Zero server uploads
- **[In-Browser Parquet & Arrow Quick Explorer](https://desitoolz.com/tools/parquet-explorer)**: Inspect Apache Parquet, Arrow, and Feather files in browser memory with zero uploads. View schemas, run SQL queries, and export to CSV.
  - Key Features: Zero-upload binary Parquet/Arrow inspector, In-browser client SQL console, Schema tree & column profiler, Instant CSV and JSON export
- **[Live HTML, CSS & JavaScript Code Previewer](https://desitoolz.com/tools/html-previewer)**: Real-time in-browser code editor and sandbox previewer. Live responsive iframe, console inspector, device viewports, and instant 1-click HTML download.
  - Key Features: Instant live HTML/CSS/JS sandbox execution, Desktop, Tablet & Mobile viewport toggles, Embedded client console error & log inspector, Ready-to-use modern landing & UI templates, 1-click standalone HTML export, Zero server uploads

---

## Guides & Documentation

- [Getting Started with PDF Tools](https://desitoolz.com/guides)
- [Client-Side Privacy Architecture](https://desitoolz.com/privacy)
- [Terms of Service](https://desitoolz.com/terms)
- [Contact Support Desk](https://desitoolz.com/contact) (aimailforuse@gmail.com)