👨💻 Developer Tools2 tools
Format, encode and debug — handy utilities for developers.
Free developer tools — format, validate, encode and decode
Developer workflows are full of small conversions: an API response that needs pretty-printing, a config file that will not parse, a token payload that needs decoding. The tools in this category handle those conversions instantly — and, unlike most online dev tools, they run entirely in your browser. That is not a minor detail: the JSON and Base64 blobs developers work with routinely contain API keys, auth tokens and customer data, and pasting them into a site that uploads to a server is a quiet security risk. Here, nothing leaves your machine.
The JSON formatter pretty-prints, minifies and validates JSON with clear error messages. Paste a single-line API response and get readable, 2-space-indented output; paste a broken config file and the validator points at the trailing comma or single quote that broke it. It handles large payloads quickly because there is no upload round-trip — everything runs on the browser's native parser.
The Base64 encoder/decoder converts text to Base64 and back with full UTF-8 support, so emoji and non-Latin characters survive the round trip. Base64 is everywhere — Basic Auth headers, data URIs, JWT payloads, Kubernetes secrets, MIME attachments — and being able to decode a blob on sight is a daily debugging skill. The two tools chain naturally: decode a JWT segment here, then pretty-print the resulting JSON in the formatter.
Adjacent tools round out the workbench. The case converter normalizes identifier and heading case in bulk, the random number generator fills test fixtures with fair random values, and the password generator creates throwaway credentials for test accounts using cryptographic randomness. Everything is free, instant and account-free, with no rate limits and no upload size caps — built to be the tab you keep open next to your editor, from the first API call of the morning to the last debugging session of the day.