{ }
Coming SoonJSON Formatter & Validator
Paste messy JSON, get clean output. Auto-detect syntax errors, collapse nested objects, and switch between tree view and raw formatted code.
A growing collection of free browser-based developer utilities. Format code, generate assets, convert data, and check accessibility — without leaving your browser or compromising your data.
Paste messy JSON, get clean output. Auto-detect syntax errors, collapse nested objects, and switch between tree view and raw formatted code.
Drop in any HTML snippet and get production-ready JSX. Converts class to className, fixes self-closing tags, and handles inline style objects.
Turn any URL, text, or WiFi credentials into a scannable QR code. Customize size and colors, then download as high-resolution PNG or SVG.
Encode strings, images, or files to Base64 instantly. Decode Base64 back to readable text or binary — perfect for embedding assets and debugging APIs.
Write regex patterns and see matches highlighted live. Inspect capture groups, get plain-English explanations, and test against multiple strings at once.
Write GitHub-flavored Markdown on the left, see rendered HTML on the right. Supports tables, code blocks with syntax highlighting, and one-click HTML export.
Compress bloated CSS for production or expand minified stylesheets for debugging. See file size savings in real time — typically 20-30% smaller output.
Safely encode special characters for query strings and API endpoints. Decode percent-encoded URLs back to human-readable text for easier debugging.
Most free online tools bury you in pop-ups, cookie banners, and forced sign-ups before you can paste a single line of code. We built devtools4me as the antidote — a clean, fast, ad-free workspace where every keystroke stays on your machine and every tool loads in milliseconds.
No advertisements. No cookie banners. No 'create an account' prompts. Open any tool and start working — the way every dev tool should be.
One clean dashboard, clear categories, instant search. Stop cycling through ten browser tabs to find a JSON formatter that actually works.
Every tool runs locally in your browser. Nothing is uploaded, stored, or logged. Safe enough for production data, API keys, and client credentials.
Everything you need to know about devtools4me and how we keep your data safe.
Yes, all tools on devtools4me are completely free to use. No sign-ups, no subscriptions, no hidden fees.
Absolutely. Every tool runs locally in your browser. Nothing is uploaded, stored, or logged. Your data never leaves your machine.
No account needed. Just open any tool and start working immediately.
No advertisements. No cookie banners. No tracking. Just clean, distraction-free tools.
The next tool on our list might be the one you've been Googling for. Get a short email when it ships.