JSON Formatter
What is JSON Formatter? (Quick Answer)
JSON beautify and minify Free online tool, no registration required, 100% client-side processing.
JSON beautify and minify
By Craftisle Team
About JSON Formatter — Free Online Tool
How to Use JSON Formatter — Step by Step
- Paste or type JSON
Type or paste JSON into the left editor panel. You can also drag and drop a .json file.
- Auto-format
The tool auto-detects if the JSON is valid. If valid, it beautifies immediately. If invalid, it highlights the error line.
- Adjust settings
Set indentation (2 spaces, 4 spaces, or tab) and toggle tree view on/off.
- Copy or download
Click Copy to copy to clipboard, or Download to save as a .json file.
Use Cases for JSON Formatter
API debugging
Quickly format minified API responses to readable JSON for debugging.
Config file editing
Beautify package.json, tsconfig.json, or other config files before committing.
Data exploration
Use tree view to explore complex nested JSON structures from APIs or databases.
FAQ — JSON Formatter Free Online Tool
Is there a size limit?
The tool uses your browser's memory. For files over ~10 MB, consider splitting them first. Most JSON responses from APIs are well under this limit.
Does it validate JSON schema?
It validates syntax (is this valid JSON?), but not schema (does it match a specific structure?). For schema validation, use a dedicated JSON Schema tool.
Is my data private?
Yes. All formatting happens locally in your browser. Nothing is uploaded to any server.