JSON formatter
Readable JSON for API responses, logs and configs right in the browser.
How it works
The JSON formatter parses your JSON using the browser's native JSON.parse, checks syntax and formats the output with indentation. Minification removes extra whitespace while preserving structure. All processing happens locally in your browser — data is never sent to a server.
When to use it
Format: preparing API responses for reading, debugging logs, inspecting config files. Minify: reducing JSON size for network transfer, preparing request payloads. Validate: quickly checking JSON before using it in code or configuration.
How to use it
- 1Paste JSON into the editor.
- 2Click Format for indentation, Minify for compression, or Validate to check syntax.
- 3Copy the result back.
Questions
Is the data sent to a server?
No. JSON is processed in the browser. Your data stays on your device.
Will large JSON freeze the page?
Processing is synchronous. If your JSON is very large, the browser may freeze briefly. For production workloads, use dedicated tools.