Is my JSON sent to a server?
No. Formatting and validation run locally in your browser.
Format and validate JSON safely in your browser.
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The guide and instructions on this page are available while the tool loads.
If parsing succeeds, the tool reformats the content using clear indentation. If parsing fails, the JSON likely contains syntax issues such as missing commas, invalid quotes, or mismatched brackets.
Because processing happens locally in the browser, you can inspect sensitive payloads without sending them to an external server.
Typical tasks this tool is built for.
Formatting and validation run locally in your browser. JSON payloads are not sent to a server for this task.
Practical tips before you download or share the output.
JSON requires double quotes for keys and strings, and does not allow trailing commas.
Longer reads that pair well with this tool.
Developer guide
A guide to JSON formatting, Base64 encoding, UUID generation, text comparison, and browser-based developer utilities.
Developer guide
Learn how to make JSON easier to read, debug, validate, and copy for API work.
Developer guide
Learn how to format, validate, and review JSON data before using it in apps, APIs, configuration files, or developer tools.
Common next steps after using this tool.
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Generate strong random passwords directly in your browser.
Encode and decode Base64 text directly in your browser.
Format or minify SQL queries directly in your browser.
Decode JSON Web Tokens directly in your browser.
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes in your browser.
Situations where this workflow saves time.
No. Formatting and validation run locally in your browser.
JSON is stricter than JavaScript — no comments, no trailing commas, and keys must use double quotes.
Local processing helps, but avoid pasting production secrets into any browser tool on a shared machine.
It formats and validates structure. Use your editor or API client to change values.
Browse related tools or open the full workspace.