Developer Tools
JSON Formatter
Validate, format, and minify JSON directly in the browser with no file upload and no external processing required, including fullscreen editing for long responses and config files.
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Paste JSON, beautify it in place, minify it for transport, or validate it before copying the final output.
Quick examples
Ready to validate and format JSON.
Usage notes
- 2 spaces is the most common indentation for JSON in web projects.
- Minified JSON is ideal for API payloads — it removes all unnecessary whitespace.
- Use fullscreen mode when formatting long JSON logs, payloads, or configuration documents.
- Paste any JSON to instantly validate it — errors show the exact line and character.
Related pages
How to Use This Tool
- 1Paste your JSON into the input area.
- 2Choose an indentation level (2 spaces or 4 spaces).
- 3Click Format to beautify, Minify to compress, or Validate to check syntax.
- 4Copy the output or use it directly in your project.
Frequently Asked Questions
- What does JSON formatting do?
- Formatting (or beautifying) adds consistent indentation and line breaks to make JSON human-readable. It does not change the data — only the visual layout.
- What does minify do?
- Minifying removes all unnecessary whitespace, line breaks, and indentation from JSON. This reduces file size, which is useful for API responses, configuration files, and network payloads.
- Is my data safe?
- Yes. All formatting happens in your browser using JavaScript. Your JSON is never sent to any server.
- Why am I getting 'Invalid JSON'?
- Common causes include trailing commas after the last item, single quotes instead of double quotes, unquoted property names, and missing brackets or braces. JSON is stricter than JavaScript object syntax.
- Can I format JSON from an API response?
- Yes. Copy the raw JSON response from your browser's developer tools or API client and paste it here to format it instantly.