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Developer ToolsFree online tool
Format JSON with readable indentation and validate whether the input is syntactically valid.
Paste or enter the data you want to process, then run the tool.
Related guideTechnology Guide
Learn what AI agents are, how they use tools and permissions, what they can do, and the practical security controls to understand before giving an agent access.
Read guideUse the controls above, check the result, then copy or download it when available.
It changes whitespace and presentation, not the JSON values represented by valid input.
Use this tool whenever you need: Debugging API responses, configuration files and payloads that are difficult to read in one line. It offers a fast, client-side workflow without sign-ups, installation or complex software.
Yes. All processing executes locally in your browser using client-side JavaScript. Your inputs, files and calculations remain private and are never uploaded to our servers.
Never paste production secrets or access tokens into a tool unless you are certain the processing model is appropriate. Important note: Formatting does not fix semantic problems in an otherwise valid JSON document.
Developer utility
Turn compact JSON into readable, indented data or minify it for a smaller payload. Everything runs locally in your browser.
1. Your JSON
Paste valid JSON to format or minify.
Formatting preserves the JSON data; it only changes whitespace and indentation. Press Ctrl/Cmd + Enter to format.
2. Your result
Your converted JSON appears here.