JSON Formatter
Beautify or minify JSON online with validation, copyable output, and clear error messages.
JSON Formatter
Free online tool · instant results
JSON Formatter workspace
Output
No output yet
Paste JSON and format to see beautified or minified output.
What it does
Beautify or minify JSON online with validation, copyable output, and clear error messages.
Best for
Beautify or minify JSON online with validation, copyable output, and cle...
Time
~1 min to complete
Pricing
Free forever
Access
No signup required
Privacy
Runs in your browser
Overview
About this tool
A clear look at what this tool is for and why people use it.
JSON Formatter
Beautify or minify JSON online with validation, copyable output, and clear error messages.
Formatting runs on demand in your session. Inputs are not saved by this tool.
Why use it
Benefits
Everything you need for a fast, confident answer — nothing you don’t.
Runs in your browser session
input is not stored by this tool
Copy results with one click
Copy results with one click
Clear validation and readable output
Clear validation and readable output
Free to use without signup
Free to use without signup
Walkthrough
How to use
Simple steps from empty form to a result you can use.
-
1
Enter or paste your input in the workspace.
-
2
Choose options if available, then run the tool.
-
3
Review the output and copy what you need.
-
4
Reset clears the workspace for another run.
Worked samples
Examples
Real-world scenarios so you can match the math to your situation.
Pretty print
Paste compact JSON and choose Beautify with 2-space indent.
Minify
Choose Minify to remove whitespace for smaller payloads.
Under the hood
How it works
Follow the path from input to output — transparent and easy to scan.
The tool decodes your
The tool decodes your JSON with PHP’s strict JSON parser, then re-encodes it.
• Beautify uses pretty-print
• Beautify uses pretty-print with unescaped Unicode and slashes.
• Minify returns compact
• Minify returns compact JSON with the same unicode rules.
• Indent 2 or
• Indent 2 or 4 spaces applies to beautified output only.
Pro tips
Tips
Small habits that make this tool even more useful day to day.
Get accurate results
Double-check units and inputs before you rely on JSON Formatter output for anything important.
Work faster
Use the examples below as a starting point, then tweak values to match your scenario.
On any device
This tool is mobile-friendly — bookmark the page so you can reopen it in one tap.
Watch out
Common mistakes
Avoid these slip-ups so your result is ready the first time.
Leaving required fields blank
Enter every value the workspace asks for before calculating — empty fields usually block a result.
Using invalid numbers
Avoid negative values or percentages outside a valid range unless the tool explicitly allows them.
Mixing up units
Keep units consistent (currency, length, weight, time) so the formula returns a meaningful answer.
FAQ
Frequently asked questions
Straight answers to the questions people ask most.
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