JSON formatter & validator
Beautify, minify and validate JSON free in your browser. Indent options, key sorting and precise error locations. 100% private, no upload, no sign-up.
100% private — files never leave your deviceHow to use
- Paste your JSON. Drop any JSON — an API response, config file or snippet — into the box.
- Set options. Pick 2 spaces, 4 spaces or tabs, and optionally sort object keys alphabetically.
- Beautify or minify. Click Beautify for readable output or Minify for the smallest single line.
- Copy the result. Copy the formatted JSON with one click. Nothing was uploaded.
Features
- Validate with clear errors. Invalid JSON is caught and pinpointed to a line and column so you can fix it fast.
- Beautify or minify. Switch between pretty-printed, indented output and compact minified JSON.
- Indent and sort options. Choose 2/4 spaces or tabs and optionally sort all object keys alphabetically.
- Nothing leaves your device. JSON is parsed and formatted locally, so sensitive payloads are never uploaded.
- One-click copy. Copy the result straight to your clipboard.
When to use it
- Make a minified API response readable while debugging.
- Validate JSON and find the exact character where it breaks.
- Minify a config file to save space before shipping.
- Sort object keys to make two JSON files easier to compare.
- Tidy up JSON copied from logs or a network tab.
Is it private?
JSON is parsed and formatted locally in your browser and is never uploaded.
Frequently asked questions
Is this JSON formatter free?
Yes, it's completely free with no sign-up and no limits.
Is my JSON uploaded anywhere?
No. Parsing and formatting happen locally in your browser, so your data is never uploaded — safe for private payloads.
Does it show where errors are?
Yes. Invalid JSON is reported with the line and column of the problem so you can fix it quickly.
Can I minify as well as beautify?
Yes. Beautify produces indented output; Minify produces the smallest valid single-line JSON.
Can I sort the keys?
Yes. Enable Sort keys to order all object keys alphabetically, recursively.
Do I need to install anything?
No. It runs entirely in your web browser with nothing to install.
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