Developer Tools
JSON Formatter and Validator
Paste JSON, then beautify or minify it. Invalid JSON shows the parser error. Parsing uses the built-in JSON object — your payload is not sent to a formatter API.
Your workspace
Runs in your browserHow to use
- 1Paste JSON.
- 2Click Beautify or Minify.
- 3Copy the output if it is valid.
What this tool does
- — Pretty print
- — Minify
- — Parse errors
Useful when
- — Reading API responses
- — Cleaning a config file
Where processing happens
JSON.parse and JSON.stringify run locally. Payloads are not logged.
Questions
Does this fix invalid JSON for me?+
No. It reports the parser error. You still edit the source.
Guides for this tool
- How to debug JSON, Base64 and cron in your browser
Validate JSON, round-trip Base64 text and check five-field cron syntax using local browser tools.
- How to format and validate JSON
Beautify or minify JSON in the browser, read parser errors, and avoid pasting secrets into a random formatter.
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- UUID GeneratorGenerate RFC 4122 v4 random or v1 time-based UUIDs.
- Cron ParserExplain a 5-field cron expression and list upcoming runs.
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