JSON Formatter (Pretty Print & Validate)

Quickly pretty-print and validate JSON with JSONAce’s online JSON formatter. Our tool reformats raw, minified, or messy JSON into a clean, human-readable structure with proper indentation. It also instantly checks for syntax errors, helping you debug your JSON data in seconds.

How to Use the JSON Formatter

1. Navigate to the main JSONAce viewer.
2. Paste your JSON data into the input field on the left, or upload a JSON file.
3. Click the Format button in the action panel.
4. Your JSON will be instantly beautified with consistent 2-space indentation. Any syntax errors will be highlighted at the bottom of the editor.

Benefits of Using Our Formatter

• Instant Readability: Transforms a long, unreadable string of data into a structured and indented format.
• Real-time Syntax Validation: Automatically detects and points out common errors like missing commas, incorrect brackets, or invalid value types.
• Client-Side Security: All formatting and validation happen directly in your browser. Your data is never sent to our servers, ensuring 100% privacy.
• Copy & Download: Easily copy the formatted JSON to your clipboard or switch to other views like the minifier or table view.

Ready to clean up your code? Try the formatter now on the main app.