JSON Formatter

What is the JSON Formatter tool?

This JSON formatter beautifies, validates and minifies JSON in one place — free, with no sign-up, and processed entirely in your browser. Paste an API response, a config file or a log line, pick 2-space, 4-space or tab indentation, and click Format for perfectly indented output or Minify to compact it back to a single line. An optional sort-keys switch orders every object key alphabetically — nested objects too — which makes two payloads easy to compare and produces stable, diff-friendly output.

The built-in JSON validator is what saves the most time: the moment you format, your input is parsed, and if something is wrong the error message points to the exact line and column with a plain-English reason. A trailing comma, a single-quoted string, an unquoted key — you jump straight to it instead of hunting through a wall of brackets. When you need to compare two payloads, format both with sorted keys and drop them into Carbide's diff checker.

API payloads and config files routinely contain tokens, credentials and customer data — which is why nothing here touches a server. Parsing, formatting and minifying all run on your device, the page keeps working offline once loaded, and there are no size nags or pro upsells. When you are done, copy the result or download it as a .json file, on desktop or on your phone.

How to use the JSON Formatter

1. Paste or type your JSON into the editor.
2. Pick an indent of 2 spaces, 4 spaces or a tab.
3. Turn on sort keys if you want object keys ordered alphabetically.
4. Click Format to beautify, or Minify to compact it to one line.
5. If the input is invalid, jump to the exact line and column the error reports and fix it.
6. Copy the result or download it as a .json file.

Frequently asked questions