All the Dev Tools You Need — Free & In Your Browser

150+ online utilities for developers, designers, and data professionals. No sign-up. No install. Your data never leaves your device.

150+
Free Tools
11
Categories
0
Sign-ups Required
100%
Browser-Based

Browse by Category

Click any category to explore all tools in that group.

Why Developers Love DevTools

Built by developers, for developers — privacy-first and blazing fast.

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Instant Results

Every tool runs directly in your browser — no server round-trips, no loading spinners. Results are immediate.

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100% Private

Your passwords, code, and data never leave your device. We cannot see what you paste into our tools.

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Works Offline

Install DevTools as a PWA and access all tools even without an internet connection.

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Dark Mode

Elegant dark and light themes that respect your system preference and persist across sessions.

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Completely Free

All 150+ tools are free forever. No premium tiers, no paywalls, no account required.

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150+ Tools

From JSON formatting to RSA key generation — the largest collection of browser-based dev tools.

Frequently Asked Questions

Is DevTools really free?
Yes. All 150+ tools are completely free to use, forever. The site is supported by non-intrusive display advertising. No premium tiers, subscriptions, or sign-ups exist.
Is my data safe when I use these tools?
Absolutely. Every tool on DevTools runs entirely inside your web browser using JavaScript. Nothing you type, paste, or upload is ever transmitted to our servers. Your data stays on your device.
Do I need to create an account?
No. DevTools requires zero sign-up and zero login. Just visit the site, pick a tool, and use it immediately.
Can I use DevTools offline?
Yes! DevTools is a Progressive Web App (PWA). In Chrome or Edge, click "Install" in the address bar to install it on your device. Once installed, it works without an internet connection.
What kinds of tools are available?
DevTools covers 11 categories: JSON tools, Encoding & Decoding (Base64, URL, Hex, Morse), Text utilities, Web Dev tools (CSS/JS/HTML/SQL formatters), Date & Time tools, Math & Numbers, Colors & Media, Network tools, SEO utilities, Hashing & Crypto, and Generators.
Can I suggest a new tool?
Yes!! We welcome tool suggestions. Please use our Contact page to submit your idea.