Semrush AI Tools

JSON Formatter & Validator – Free Online Tool

DEVELOPER & WEB TOOLS

JSON Formatter & Validator

Format, minify, sort keys and validate JSON with errors pinpointed — the quick JSON workbench for developers.

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🔒 Private: everything runs in your browser. Sort-keys reorders every object alphabetically, including nested ones.

HOW IT WORKS

How to Format JSON

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Paste your JSON

Any JSON text, valid or broken.

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Choose an action

Format (2/4-space or tab indent), Minify, Sort keys, or Validate.

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Copy or download

Take the clean result as text or a .json file.

WHY CHOOSE US

Why Use Our JSON Formatter?

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Errors Pinpointed

Invalid JSON is reported with the position and a context snippet, not a cryptic message.

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Sort Keys Recursively

Alphabetize every object, including nested ones.

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Minify in One Click

Shrink JSON for production payloads, with the size shown.

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Private by Design

Everything runs in your browser; your data never leaves.

FREQUENTLY ASKED QUESTIONS

Common Questions About JSON Formatter

Press Validate: you’ll get the error position plus a snippet of the surrounding text so you can spot the missing comma or quote.
It reorders every object’s keys alphabetically, recursively through nested objects and arrays.
Yes — the indent selector offers 2 spaces, 4 spaces, or a real tab.
No — it only removes whitespace; the data and key order stay identical.
No — parsing runs 100% in your browser.
EXPLORE MORE

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Ready to try it?

No sign-up, no installation — just open the tool and get started in seconds.

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