Kritools
All Tools
Every free Kritools utility in one place. Search by keyword or filter by category below.
About Kritools' Tool Collection
Kritools is a growing library of small, focused browser utilities built to solve everyday problems without requiring you to install software, create an account, or hand over your data. Every tool in this collection runs entirely inside your browser using JavaScript — that means files you convert, text you paste, or identifiers you generate never leave your device.
The tools fall into four main categories, described below. If you're new here, the fastest way to find what you need is to use the search bar above — type a keyword like "JSON", "QR", or "password" and matching tools appear immediately.
Developer Tools
The developer category covers the low-level data chores that come up constantly when building or debugging software: formatting raw JSON API responses into readable indented output, encoding binary data into Base64 strings for transport, or generating unique identifiers for database rows, session tokens, or request tracking. Each tool is designed to handle real-world edge cases — for example, the JSON formatter pinpoints exactly where a syntax error occurs rather than returning a vague failure, and the Base64 encoder correctly handles Unicode characters like emoji and non-Latin scripts.
Image Tools
The image category focuses on two common tasks: converting between the three dominant web image formats (PNG, JPG, and WebP) and combining multiple images into a single PDF document. The converter runs entirely client-side using the browser's canvas API, which means you can convert sensitive images without uploading them anywhere. If you need to compress a photo before sharing or want to merge a handful of scans into one downloadable PDF, this is the place.
Text Tools
The word and character counter provides live statistics as you type: word count, character count with and without spaces, sentence count, paragraph count, estimated reading time, and top keyword density. It's useful for writers checking article length, students meeting essay word limits, or anyone verifying that a social media caption fits within a platform's character cap.
Productivity Tools
Day-to-day utility tools round out the collection. The password generator creates cryptographically secure random passwords using your browser's built-in secure random source. The date calculator handles days-between-dates queries, date arithmetic, and weekday lookups. And the QR code studio generates scannable codes for URLs, Wi-Fi networks, UPI payments, contact cards, WhatsApp messages, and email addresses — with customizable colors and high-resolution PNG download.
Why Choose Kritools?
Three things make Kritools different from most free online tool sites:
- Privacy-first architecture. Nearly every tool processes your input locally using JavaScript. There is no server-side database, no logging of tool contents, and no processing pipeline that could leak your data.
- No account required. You never need to sign up, verify an email, or hand over personal details to use any tool. Preferences like dark mode and recently used tools are stored in your own browser.
- No paywalls or artificial limits. Every tool works the same for every visitor. There are no "free tier" restrictions that push you toward a paid upgrade.
Frequently Asked Questions
Are Kritools tools really free?
Yes. Kritools is funded by lightweight advertising. There are no premium tiers, no locked features, and no usage caps hidden behind an upgrade prompt.
Do I need to install anything?
No. Every tool is a standard web page — it works in any modern browser (Chrome, Firefox, Safari, Edge) on desktop, tablet, or mobile.
Is my data uploaded anywhere?
Almost never. Wherever technically possible, tools process your input directly in the browser. You can verify this yourself by opening your browser's Network tab while using a tool — no outbound requests carry your data.
Can I use Kritools for commercial work?
Yes. There are no licensing restrictions on the output of any tool. Converted images, generated UUIDs, QR codes, and formatted text are yours to use freely.