# Kitmul

> Kitmul is a free, privacy-first platform with 490+ browser-based tools. All processing runs client-side — no file uploads, no accounts, no limits.

## Main Pages
- [Homepage](https://kitmul.com/en): Browse all 490+ tools across 23 categories
- [About](https://kitmul.com/en/about): Mission, founder info, and platform stats
- [Chat Assistant](https://kitmul.com/en/chat): AI-powered tool finder and assistant

## Tool Categories
- [PDF Tools](https://kitmul.com/en/pdf): Merge, split, compress, convert PDFs — all in-browser
- [Developer Tools](https://kitmul.com/en/developer): JSON formatter, regex tester, UUID generator, and more
- [Image & Design Tools](https://kitmul.com/en/image-design): Resize, convert, compress images privately
- [Unit Converters](https://kitmul.com/en/converters): Precise unit conversions, instantly in your browser
- [Data Tools](https://kitmul.com/en/data): CSV, JSON, XML converters and processors
- [Data & Coding Utilities](https://kitmul.com/en/data-coding): Encoders, decoders, formatters, and coding helpers
- [Math & Calculators](https://kitmul.com/en/math): Percentage, unit, and scientific calculators
- [Writing & Text Tools](https://kitmul.com/en/writing): Word counter, case converter, resume builder, text diff
- [AI Tools](https://kitmul.com/en/ai): AI-powered tools for text, images, and productivity
- [Date & Time Tools](https://kitmul.com/en/datetime): Date calculators, timezone converters, countdowns
- [Finance & Business](https://kitmul.com/en/finance): Loan, investment, tax, and invoice calculators
- [Health & Wellness](https://kitmul.com/en/health): BMI, calorie, and health calculators
- [Social Media & SEO](https://kitmul.com/en/social): Meta tag generators, Open Graph tools
- [Security & Cryptography](https://kitmul.com/en/security): Password generators, hash tools, encryption
- [Education & Science](https://kitmul.com/en/education-science): Chemistry, physics, and biology calculators
- [Music & Audio](https://kitmul.com/en/music): BPM counter, metronome, audio converters, DAW
- [Video Tools](https://kitmul.com/en/video): Video conversion, trimming, compression, upscaling
- [Sport & Performance](https://kitmul.com/en/sport-performance): Athletic calculators and trackers
- [Random Generators](https://kitmul.com/en/random): Random generators, dice rollers, fun utilities
- [Agile & Project Management](https://kitmul.com/en/agile-project-management): Sprint, velocity, prioritization, and retro tools
- [Visualizers & Logic](https://kitmul.com/en/visualizers-logic): Algorithm animators, regex diagrams, logic visualizers
- [Design & CSS](https://kitmul.com/en/design-css): Gradient generators, shadow builders, CSS utilities
- [Everyday & Practical](https://kitmul.com/en/everyday-practical): Cooking, GPA, electricity, and everyday calculators

## Popular Tools

- Age Calculator: /en/datetime/age-calculator - Calculate exact age in years, months, days, hours, minutes, and seconds
- Date Difference Calculator: /en/datetime/date-difference-calculator - Calculate the exact difference between two dates
- Date Adder: /en/datetime/date-adder - Add or subtract days, months, or years from any date
- Business Days Calculator: /en/datetime/business-days-calculator - Count working days between two dates excluding weekends and holidays
- Unix Timestamp Converter: /en/datetime/unix-timestamp-converter - Convert Unix timestamps to human-readable dates and back
- Week Number Calculator: /en/datetime/week-number-calculator - Find the ISO week number for any date
- Leap Year Checker: /en/datetime/leap-year-checker - Check whether a given year is a leap year
- Countdown Timer: /en/datetime/countdown-timer - Set a countdown to any future date or event
- Stopwatch & Lap Timer: /en/datetime/stopwatch-lap-timer - Precise stopwatch with lap tracking
- Seconds to HMS Converter: /en/datetime/seconds-to-hms - Convert seconds to hours, minutes, and seconds
- Astronomic Clock: /en/datetime/astronomic-clock - Visual astronomic clock with sun and moon positions

## Comparisons
- [Kitmul vs SmallPDF](https://kitmul.com/en/alternatives/smallpdf): Feature comparison
- [Kitmul vs Convertio](https://kitmul.com/en/alternatives/convertio): Feature comparison
- [Kitmul vs iLovePDF](https://kitmul.com/en/alternatives/ilovepdf): Feature comparison
- [Kitmul vs TinyWow](https://kitmul.com/en/alternatives/tinywow): Feature comparison
- [Kitmul vs PDF24](https://kitmul.com/en/alternatives/pdf24): Feature comparison
- [Kitmul vs Zamzar](https://kitmul.com/en/alternatives/zamzar): Feature comparison
- [Kitmul vs CloudConvert](https://kitmul.com/en/alternatives/cloudconvert): Feature comparison
- [Kitmul vs CyberChef](https://kitmul.com/en/alternatives/cyberchef): Feature comparison
- [Kitmul vs DevToys](https://kitmul.com/en/alternatives/devtoys): Feature comparison
- [Kitmul vs Online-Convert](https://kitmul.com/en/alternatives/onlineconvert): Feature comparison
- [Kitmul vs Adobe](https://kitmul.com/en/alternatives/adobe): Feature comparison
- [Kitmul vs FreeConvert](https://kitmul.com/en/alternatives/freeconvert): Feature comparison
- [Kitmul vs PDF.co](https://kitmul.com/en/alternatives/pdfco): Feature comparison
- [Kitmul vs Soda PDF](https://kitmul.com/en/alternatives/sodapdf): Feature comparison

## FAQ
- **What is Kitmul?** Kitmul is a free platform with 490+ browser-based tools for PDFs, images, data conversion, developer utilities, and more. All processing happens on your device — no files are uploaded to servers.
- **Is Kitmul really free?** Yes, every tool is 100% free with no usage limits, no premium tiers, and no account required. The platform is supported by non-intrusive ads.
- **How does Kitmul protect my privacy?** Every tool runs entirely in your browser using client-side JavaScript and WebAssembly. Your files and data never leave your device.
- **Does Kitmul work offline?** Yes, Kitmul is a Progressive Web App (PWA). Once a tool page is loaded, it works offline without an internet connection.
- **What is the best free alternative to SmallPDF?** Kitmul offers all major PDF operations (merge, split, compress, convert, watermark) completely free with no file uploads, unlike SmallPDF which limits free usage and processes files on their servers.

## Blog
- [One PR to a parser unlocked prerendering in Brisa](https://kitmul.com/en/blog/ast-visualizer-javascript-code-parsing-browser): From JavaScript parsers to Brisa; an AST visualizer for Acorn, Meriyah, and SWC
- [I Ran a Neural Network in a Browser Tab to Split a Song into Stems](https://kitmul.com/en/blog/audio-stem-splitter-ai-source-separation-browser): Demucs via ONNX + WebAssembly for stem separation; zero uploads, zero accounts
- [I Stopped Installing Qiskit to Understand Hadamard Gates](https://kitmul.com/en/blog/quantum-circuit-simulator-browser-bell-state-ghz): A browser-based quantum circuit simulator with 3 qubits, 5 gates, and zero setup
- [Your Age Isn't a Number; It's a Vector](https://kitmul.com/en/blog/age-calculator-how-old-am-i-exact-age): Exact age for insurance, immigration, health; free browser calculator
- [SAP Hybris Impex When None of Us on the Team Can Read It](https://kitmul.com/en/blog/impex-sap-hybris-survival-guide): 8 browser tools to treat Impex like any other codebase
- [I Was Paying Anthropic to Read CSS Class Names](https://kitmul.com/en/blog/html-to-markdown-llm-tokens): Why converting HTML to Markdown cut LLM token costs by 60%
- [WSJF, Cost of Delay and Backlog Prioritization](https://kitmul.com/en/blog/wsjf-calculator-cost-of-delay-agile-prioritization): Free browser-based WSJF calculator for PI planning
- [Free Invoice, Resume, and Cover Letter Generators (No Signup)](https://kitmul.com/en/blog/free-invoice-resume-cover-letter-generator-no-signup): Three browser-based document generators with live preview and clean PDF export
- [AVIF in 2026: The Complete Guide](https://kitmul.com/en/blog/avif-image-format-complete-guide): The image format that beat JPEG, PNG, and WebP
- [I Built a DAW and a DJ Tool in the Browser](https://kitmul.com/en/blog/browser-daw-music-scale-library-free-tools): Full loop-based DAW plus dual-deck DJ mixer, running entirely in-browser
- [Caffeine Half-Life Calculator](https://kitmul.com/en/blog/caffeine-half-life-calculator-sleep-optimization): Multi-intake cumulative caffeine decay for sleep optimization
- [The Complete PDF Toolkit in Your Browser](https://kitmul.com/en/blog/complete-pdf-toolkit-browser): 19 PDF tools, zero uploads
- [6 New Agile Tools: WIP Aging, Forecasting & Team Formation](https://kitmul.com/en/blog/6-agile-tools-wip-aging-forecasting-team-formation): Beyond Jira dashboards
- [Monte Carlo Forecasting for Agile Delivery](https://kitmul.com/en/blog/monte-carlo-forecasting-agile-delivery): Stop guessing when software will ship
- [How to Detect AI-Generated Content](https://kitmul.com/en/blog/how-to-detect-ai-generated-content): Perplexity and burstiness analysis explained
- [12 New Free Tools: Health, Security, CSS & More](https://kitmul.com/en/blog/12-new-tools-health-security-css-calculators): BMI, BMR, password strength, CSS gradients and more
- [How to Publish Markdown to Medium Without Losing Formatting](https://kitmul.com/en/blog/markdown-to-medium-guide): Fastest way to get Markdown into Medium
- [#KitmulExodus: Free Your Creative Assets from Adobe's Lock-in](https://kitmul.com/en/blog/kitmul-exodus-free-your-creative-assets-from-adobe): 8 free tools to convert PSD, XD, ASE to open formats
- [Dollar Cost Averaging: The Strategy That Beats Timing](https://kitmul.com/en/blog/dollar-cost-averaging-strategy-guide): The math and psychology behind DCA
- [AI Agents Shouldn't Control Your Apps; They Should Be the App](https://kitmul.com/en/blog/building-kitmul-ai-tools-os): Why AI should orchestrate tools rather than generate them
- [Why Client-Side Tools Are More Private](https://kitmul.com/en/blog/why-client-side-tools-are-more-private): Privacy advantages of browser-based processing
- [10 Free Developer Tools You Didn't Know You Needed](https://kitmul.com/en/blog/10-free-developer-tools): Essential developer utilities
- [How to Work with PDFs Without Uploading Your Files](https://kitmul.com/en/blog/pdf-tools-without-uploading): Private PDF processing guide
- [I Tracked My To-Do List for 30 Days. 73% of My 'Urgent' Work Was Someone Else's Emergency.](https://kitmul.com/en/blog/eisenhower-matrix-urgent-vs-important-prioritization): The Eisenhower Matrix separates urgency from importance; here's the system and a free browser tool
- [I Stopped Using YouTube for Focus Music and My Pomodoro Sessions Got 10x Better](https://kitmul.com/en/blog/pomodoro-timer-with-music-no-ads-deep-focus): A Pomodoro timer with built-in lofi, jazz, and classical music that never interrupts
- [I Needed Subtitles for a 12-Minute Demo](https://kitmul.com/en/blog/automatic-subtitle-generator-whisper-ai-browser): Whisper via ONNX in the browser for real-time subtitle generation
- [Create 360 Panoramas with GPT Image 2](https://kitmul.com/en/blog/gpt-image-2-create-360-panorama-interactive-viewer): Generate equirectangular panoramas with AI and view them in an interactive 3D viewer
- [Three Ways to Turn JSON into TypeScript](https://kitmul.com/en/blog/json-to-typescript-interfaces-api-type-safety): Manual, LLM, and deterministic converter compared for type safety
- [My Friends Spent 14 Minutes Deciding Where to Train](https://kitmul.com/en/blog/spin-the-wheel-random-picker-decision-making): Decision fatigue and why a random wheel beats group deliberation
- [Big O Notation: A Visual Guide to Algorithm Complexity](https://kitmul.com/en/blog/big-o-notation-algorithm-complexity-visual-guide): Real code and interactive visualizations for every complexity class
- [From Determinism to Probabilism](https://kitmul.com/en/blog/from-determinism-to-probabilism-ai-paradigm-shift): The paradigm shift from deterministic to probabilistic computing
- [Hide Secret Messages in Images with Steganography](https://kitmul.com/en/blog/steganography-hide-secret-messages-images-tutorial): LSB encoding, detection techniques, and a free browser tool

## Optional
- [Privacy Policy](https://kitmul.com/en/privacy): Data handling practices
- [Terms of Service](https://kitmul.com/en/terms): Usage terms
- [Newsletter](https://kitmul.com/en/newsletter): Latest updates and tool releases
- [Changelog](https://kitmul.com/en/changelog): Version history and new tools
- [Full Tool Listing](https://kitmul.com/llms-full.txt): Complete list of all 490+ tools with descriptions