DevToolBox
50+ free browser-based dev tools. No signup required.
DevToolBox launched on March 10, 2026.
What it does
DevToolBox is a collection of 50+ free browser-based developer tools. Format JSON, encode Base64, decode JWTs, generate UUIDs, test regex, convert colors, generate QR codes, and much more. Every tool runs entirely in your browser — no signup required, no data sent to any server. Built for developers who value privacy, speed, and simplicity. Zero cost to use, works offline after first load.
50+ free online developer tools: JSON formatter, Base64 encoder, JWT decoder, regex tester, hash generator and more. All processing happens in your browser.
Fast, free, browser-based tools for developers. No signup required. Your data never leaves your browser. Format, beautify, minify and validate JSON data online. Supports syntax highlighting and error detection. Format, beautify and minify HTML code with proper indentation and syntax highlighting. Format and beautify XML documents with proper indentation. Validates XML structure. Write Markdown and preview the rendered HTML in real-time. Copy the generated HTML with one click. Minify and beautify CSS code online. Remove comments, whitespace and optimize for production. Minify JavaScript code by removing comments, whitespace and unnecessary characters. Format and beautify SQL queries with…from toolbox-dev.com
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