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{ }JSON Formatter🗜️Compressor🔄ConverterNEW📄PDF Tools🔐Passwords📝Word Counter🎨Gradients⏰Cron Builder📱QR CodesNEW🔍Regex Tester
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Free Web Tools

10 essential tools that run 100% in your browser. No uploads. No tracking. No signup.

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All Tools

10

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Web Tools
{ }

JSON Formatter & Validator

Format, validate, and minify JSON data with syntax highlighting.

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Media Tools
🗜️

Image Compressor

Compress images without losing visual quality.

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Media ToolsNEW
🔄

Image Format Converter

Convert images between PNG, JPEG, WebP, and AVIF formats.

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Utilities
📄

PDF Merge, Compress & Split

Merge, compress, and split PDF files in the browser.

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Security
🔐

Password Generator

Generate strong, cryptographically secure passwords.

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Text Tools
📝

Word & Character Counter

Count words, characters, sentences, and estimate reading time.

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Design Tools
🎨

CSS Gradient Generator

Design beautiful CSS gradients with a visual editor.

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Web Tools
⏰

Cron Expression Builder

Build and decode cron expressions with a visual interface.

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UtilitiesNEW
📱

QR Code Generator

Generate customizable QR codes for URLs, text, and more.

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Web Tools
🔍

Regex Tester & Explainer

Test regular expressions with real-time matching and explanations.

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100% Private

All processing happens locally in your browser. Your files never leave your device.

Lightning Fast

No server round-trips. Everything runs client-side using modern Web APIs.

Always Free

No signup. No limits. No premium tier. Every tool is completely free.

Frequently Asked Questions

Are these developer tools really free?
Yes, every tool on ToolsStack is completely free with no hidden fees, premium tiers, or usage limits. We believe essential developer utilities should be accessible to everyone, whether you're a hobbyist or a professional engineer.
Is my data safe when using ToolsStack?
Absolutely. All processing happens locally in your browser using client-side JavaScript and Web APIs. Your files, text, and data never leave your device — nothing is uploaded to any server. There are no analytics trackers or third-party data collection scripts.
Do I need to create an account to use the tools?
No signup or account is required. Simply open any tool and start using it immediately. There are no login walls, email gates, or mandatory registrations of any kind.
Can I use these tools on mobile devices?
Yes, ToolsStack is fully responsive and works on smartphones and tablets. Every tool has been optimized for touch input and smaller screens, so you can format JSON, generate passwords, or compress images right from your phone.
What technologies power these tools?
ToolsStack is built with Next.js 15 and TypeScript for a fast, reliable experience. Individual tools leverage modern Web APIs like the Canvas API for image processing, the Web Crypto API for password generation, and libraries like pdf-lib for PDF manipulation — all running entirely in your browser.