JSON formatter
Format JSON, JavaScript, CSS, HTML, or PHP as you type.
JSON Formatter & Code Beautifier
Format and beautify JSON with proper indentation. Also supports JavaScript, CSS, HTML, and PHP. Make minified or messy code readable again.
How It Works
Paste your minified or messy code in the input area
Select the code type (JSON, JS, CSS, HTML, PHP)
Read, copy or adjust the formatted result as it updates
Features
Frequently Asked Questions
Is this tool really free?
Yes, 100% free with no hidden costs or limits. All processing happens.
Do I need an account?
No. The tool is free to use with no sign-up, no watermark and no limits.
What does JSON formatting do?
Formatting adds proper indentation, line breaks, and spacing to make JSON and code more readable without changing its functionality.
JSON Formatter Online, The Complete Guide
Need to format JSON online? Our free JSON beautifier prettifies minified JSON, validates syntax, and helps fix JSON errors, essential for developers working with APIs, configuration files, and data processing.
Prettify JSON Free
Prettify JSON free with proper indentation and line breaks. Paste minified JSON that is impossible to read, and instantly get formatted output with clear structure. Choose 2-space or 4-space indentation based on your preference.
JSON Formatter Online
Our JSON formatter online transforms compact JSON into human-readable format. See nested objects and arrays clearly, with syntax highlighting that makes it easy to navigate complex data structures and identify specific values.
Validate JSON Syntax
Validate JSON syntax and catch errors instantly. Our tool identifies missing commas, unquoted keys, trailing commas, and other common JSON mistakes. Error messages point to the exact line and character position of the problem.
Tips for Working with JSON
- JSON keys must be strings in double quotes
- No trailing commas allowed after the last element
- Use the minify option to reduce file size for production
- All processing happens locally, your data stays private
Related Tools
More than a quick json formatter.
A JSON formatter turns compact or messy structured data into readable, indented text. The same workbench can also make JavaScript, CSS, HTML, and PHP easier to inspect before you copy, troubleshoot, or share a snippet.
Paste the source, choose its language, and read the formatted result as it updates. Invalid JSON is called out so you can fix the syntax before it reaches an API, configuration file, or production build.
How to use the json formatter.
Start with the tool above. There is no account step between you and the result.
- 01
Paste the source code or JSON.
- 02
Choose the matching format.
- 03
Read the updated output, fix an error if needed, then copy it.
JSON formatter answers.
Useful context before you use the result somewhere important.
Does formatting change the data?
Formatting changes whitespace and indentation to improve readability. It should not change valid JSON data.
Why am I seeing an error?
The JSON may be missing a quote, comma, bracket, or another required character. Correct the indicated syntax and try again.
Can I format HTML or CSS too?
Yes. Choose the relevant format before pasting or reviewing the result.
Give the document a place to go.
Keep PDFs, templates, feedback, approvals and signatures together in one workspace.