💻 Free Developer Tools

19 free tools, no sign-up needed.

JSON Formatter Beautify, minify and validate JSON, with exact error locations and a tree view. Base64 Encode / Decode Convert text and files to Base64 and back, with UTF-8 and URL-safe support. Image to Base64 Turn an image into a data URI with copy-ready HTML and CSS, or decode Base64 back to an image. URL Encode / Decode Percent-encode or decode text and URLs, and see every part of a link at a glance. QR Code Generator Make QR codes for links, Wi-Fi, contacts and more, and download them as PNG or SVG. QR Code Scanner Read QR codes from an uploaded image or your camera, without installing an app. Password Generator Create strong, truly random passwords with a live strength meter. UUID Generator Create random version 4 or time-ordered version 7 UUIDs in bulk. Hash Generator Hash text or files with MD5 and SHA algorithms and verify checksums. JWT Decoder Paste a JSON Web Token to read its header, claims and expiry time. Unix Timestamp Converter Turn epoch seconds or milliseconds into readable dates, and dates back into timestamps. Color Converter Convert any color between HEX, RGB, HSL, HSV and CMYK, and check its contrast. Regex Tester Write a regular expression and see every match highlighted as you type. CSV to JSON Paste or open a CSV file and get a clean JSON array of objects. JSON to CSV Turn a JSON array of objects into a spreadsheet-ready CSV file. HTML Encode / Decode Escape special characters as HTML entities, or turn entities back into text. Slug Generator Convert any title into a short, clean, readable URL slug. Random Number Generator Pick one or many random numbers in any range, with or without repeats. Markdown to HTML Write Markdown on the left and get a live preview and clean HTML code.

Fast, clean utilities for developers and power users: format and validate JSON, encode and decode Base64 and URLs, generate QR codes, hashes, UUIDs and strong passwords, decode JWTs, convert timestamps and colors, and test regular expressions.

Everything runs locally in your browser, so it is safe to paste tokens and data.

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