Online Developer Tool
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Free browser-based utilities for JSON, JWT, Base64, UUIDs, hashes, timestamps and more.
About Online Developer Tool
OnlineDeveloperTool.com is a collection of 54 free developer utilities that run in the browser with no signup. It covers small, repetitive tasks: formatting, validating and beautifying JSON, decoding JWTs, encoding and decoding Base64 and URLs, generating UUIDs and SHA-256 hashes, and converting Unix timestamps. Other tools validate XML, convert YAML to JSON, convert number bases and HEX colors to RGB, change text case, create URL slugs, compare text with a diff checker, test regular expressions and check whether a website is up. Each tool has its own page, and the site also publishes short guides on the formats it handles.