JSON Formatter
Format, validate, minify, and analyze JSON data — entirely in your browser.
Input
Options
About JSON Formatter
Format, validate, minify, and analyze JSON data entirely in your browser. No data is sent to a server — everything stays private.
- Pretty-print with configurable indentation (2, 4, or 8 spaces)
- Minify JSON to a single line for production use
- Sort keys alphabetically for consistent formatting
- Validate JSON with detailed error messages
- Syntax highlighting for keys, strings, numbers, booleans, and nulls
- Structural analysis: key count, depth, type breakdown
JSON Formatter FAQ
Answers to the most common questions about this page.
Can JSON Formatter validate malformed JSON?
Yes. It validates JSON input and highlights parse issues so you can quickly identify invalid structures.
Can I prettify and minify JSON in one tool?
Yes. You can switch between formatted output and minified JSON depending on your use case.
Is this tool useful for API development and debugging?
Yes. It is useful for inspecting API payloads, formatting responses, and validating request/response bodies.
Does JSON data stay in my browser?
Yes. Formatting and validation happen client-side without server-side storage.
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