JSON Formatter client-side ?
How to use JSON FormatterThe JSON formatter takes minified or messy JSON and rewrites it with clean, readable indentation. Paste your content, pick 2 or 4 spaces, and instantly get a structured view you can read, diff, or copy back into your editor. It's handy for inspecting an API response, debugging a config file, or preparing a clear example to share.
Everything runs in your browser. No JSON is ever uploaded to a server, so you can safely format payloads that contain auth tokens, customer records, or other sensitive data.
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The JSON formatter takes minified or messy JSON and rewrites it with clean, readable indentation. Paste your content, pick 2 or 4 spaces, and instantly get a structured view you can read, diff, or copy back into your editor. It's handy for inspecting an API response, debugging a config file, or preparing a clear example to share. Everything runs in your browser. No JSON is ever uploaded to a server, so you can safely format payloads that contain auth tokens, customer records, or other sensitive data.
Format and indent your JSON instantly.
How to use JSON Formatter
The JSON formatter takes minified or messy JSON and rewrites it with clean, readable indentation. Paste your content, pick 2 or 4 spaces, and instantly get a structured view you can read, diff, or copy back into your editor. It's handy for inspecting an API response, debugging a config file, or preparing a clear example to share. Everything runs in your browser. No JSON is ever uploaded to a server, so you can safely format payloads that contain auth tokens, customer records, or other sensitive data.
Frequently asked questions
Is my JSON sent to a server?
No. Formatting runs entirely in your browser and nothing leaves your machine.
Which indentation should I use?
Two spaces suit web and compact files, while four spaces make deeply nested structures easier to read.
Does it flag syntax errors?
Yes. If the JSON is invalid, the tool points to where the problem is so you can fix it before formatting.
Is there a size limit?
The only limit is your browser's memory. Files of several megabytes usually format without trouble.