Online developer tools
Everyday utilities for developers: JSON, encodings and identifiers.
- JSON FormatterPaste JSON to indent it, squeeze it into one line, or find out exactly where it breaks.
- JSON ValidatorPaste JSON to find out whether it is valid — and if not, exactly where and why.
- Base64 Encoder / DecoderTurns text into Base64 and back. Accents, non-Latin scripts and emoji are handled correctly.
- URL Encoder / DecoderTurns hello world & more into hello%20world%20%26%20more and back, for query strings, links and APIs.
- UUID GeneratorCreates random version 4 UUIDs, one at a time or as a list of up to 500.