JSON Formatter & Validator
Beautify, minify, validate, and explore your JSON data. The ultimate developer tool for debugging and formatting.
Format, Validate, and Explore JSON
Paste messy JSON and get it beautifully formatted with proper indentation in one click — or minify it down for production. Invalid JSON gets a clear, pinpointed error message instead of a cryptic failure.
Switch to tree view to explore deeply nested structures, check input stats at a glance, and copy or download the result. Everything runs locally in your browser.
Format, minify, and tree view
Beautify JSON for reading, minify it for shipping, or expand it as an interactive tree to navigate complex payloads.
Clear validation errors
When JSON is invalid, the tool tells you exactly where parsing failed so you can fix it fast.
Private by design
Formatting and validation run entirely in your browser — API responses and config data you paste are never uploaded.
How to use
- Paste your JSON into the input panel.
- Click Format (or Minify for compact output).
- Copy the result or switch to tree view to explore it.
Frequently Asked Questions
What does the JSON formatter do?
It parses your JSON and re-outputs it with consistent indentation (beautify), or strips all whitespace (minify), while validating that it is well-formed.
What happens with invalid JSON?
The validator reports the exact position and reason parsing failed, so you can locate and fix the error.
What is tree view?
An expandable, collapsible view of your JSON structure — handy for exploring large API responses without scrolling through raw text.
Is my JSON uploaded to a server?
No. All parsing and formatting happens locally in your browser.
Is the tool free?
Yes, free with no signup.
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