Standard JSON is expected. Remove comments/trailing commas first.

Formatting runs locally by default.

Browser memory limits apply; split very large documents.

JSON Formatter - Beautify & Minify

What can you do with it?

Beautify or minify JSON

Format API payloads and config files instantly

Spot syntax errors

Catch missing commas and broken quotes faster

Debug API responses

Make nested fields readable during integration

Compare size impact

Minify before shipping payloads

Share readable JSON

Copy formatted text for teammates

Local processing

Keep sensitive configs in the browser

Why choose this tool?

Format & minify

Both workflows on one page

Error feedback

Readable messages for invalid JSON

Clear hierarchy

Indentation that is easy to scan

Local-first

No upload required for formatting

How to use?

1

Paste JSON

Drop text into the input area

2

Format or minify

Run the action and inspect output

3

Copy result

Use the formatted/minified JSON

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FAQ

Is JSON5 supported?: Standard JSON is expected. Remove comments/trailing commas first.
Is data uploaded?: Formatting runs locally by default.
Huge files?: Browser memory limits apply; split very large documents.

JSON Formatter

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