JSON Formatter
WEBFree online JSON formatter, validator and minifier that beautifies, sorts and compacts JSON right in your browser.
What it does
The Carbide JSON Formatter cleans up messy or minified JSON into perfectly indented, readable structure, and can compact it back to a single line when you need the smallest payload. Paste a config file, an API response, or a log line, then choose 2-space, 4-space, or tab indentation, optionally sort every object key alphabetically for stable diffs, and format or minify in one click. Built-in validation parses your input the moment you act on it and, when something is wrong, points you straight to the problem with the exact line and column plus a plain-English reason — no more hunting for a stray comma or missing bracket. Everything runs entirely in your browser, so your data never leaves your device and the tool keeps working offline once loaded, which makes it safe even for private tokens and internal payloads. When you are happy, copy the result or download it as a .json file. It is free, with no sign-up, no watermarks, and no limits.
How to use the JSON Formatter
- Paste or type your JSON into the editor
- Pick an indent of 2 spaces, 4 spaces, or a tab
- Turn on sort keys if you want object keys ordered alphabetically
- Choose Format to beautify or Minify to compact it
- Fix any error using the line and column it reports
- Copy the result or download it as a .json file
Frequently asked questions
- Is the JSON Formatter free?
- Yes, completely. There is no sign-up, no watermark, and no limit on how much JSON you format, validate, or minify.
- Does my JSON get uploaded anywhere?
- No. All parsing, formatting, and minifying happens on-device in your browser, so your data never leaves your computer and the tool works offline once loaded.
- How does validation help me find errors?
- When your input is not valid JSON, the tool reports the exact line and column of the problem along with a plain-English reason, so you can jump straight to the stray comma, quote, or bracket.
- What does sort keys do?
- It reorders the keys of every object alphabetically, top to bottom and nested too, which makes two JSON files easy to compare and produces stable, diff-friendly output.