JSON Formatter & Validator Online Safe Parsing
Format, beautify, validate, and minify JSON data. Pinpoints exact error line and column locations, prevents code execution, and warns about large integers.
Input JSON
0 charsFormatted Output
0 charsHow to Use JSON Formatter Online for Free
Paste Raw JSON
Enter or paste unformatted or minified JSON data into the input box.
Select Indentation Style
Choose 2 spaces, 4 spaces, or Tab indentation for your preferred code style.
Click Beautify or Minify
Format with clean indentation or minify into a single compact string for production.
Inspect Errors or Copy Result
View line and column error pointers for syntax errors, or copy the formatted JSON with one click.
Key Features & Capabilities
Syntax Error Line & Column Diagnostics
Pinpoints the exact location of missing commas, unmatched brackets, or trailing characters.
Indentation Controls
Easily toggle between 2-space indentation, 4-space indentation, or standard tabs.
Safe Code Parsing
Uses native JSON.parse with zero code execution, preventing prototype pollution or script injection.
Large Integer Precision Warnings
Warns when numeric values exceed JavaScript IEEE-754 64-bit integer limits (9,007,199,254,740,991).