Free Online Developer Tools
A curated set of developer utilities: JSON formatter, Base64 encoder, URL encoder, UUID generator, regex tester, hash generator, JWT decoder, YAML/JSON converter and more. All the tools you keep opening in different tabs, in one place.
Format, prettify, and validate JSON with syntax highlighting.
Validate JSON syntax and quickly locate errors.
Encode text to Base64 or decode Base64 back to plain text.
Percent-encode or decode URLs and query string parameters.
Generate cryptographically strong UUID v4 identifiers in bulk.
Test JavaScript regular expressions with live match highlighting.
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes from any text, in real time.
Decode a JSON Web Token and inspect its header, payload and expiration in one click.
Convert between YAML and JSON while preserving structure, arrays and types.
Why Utilify developer tools?
Every tool in this category runs entirely in your browser. That means instant results, no data sent to a server, and no signup required to try any of them.
Utilify is designed so that you can bookmark a single tool and get in-and-out in seconds. If a workflow needs several tools, the internal search (⌘K) jumps between them with no full-page reload.