JSON Formatter & Validator - Beautify Your Data Instantly
Paste your JSON and watch it transform into clean, readable code. Our formatter validates syntax, highlights errors with exact line numbers, and lets you switch between editor and tree view. No sign-up, everything runs in your browser.
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Statistics
Everything You Need in One Place
Built for developers and data analysts who need reliable tools that just work.
Format & Beautify
Clean up messy JSON with neat, readable indentation. Choose 2 or 4 spaces depending on what you prefer.
Instant Validation
Find errors instantly with clear messages and line numbers. It helps you fix problems before they slow you down.
Compress Files
Remove extra whitespace to cut file size down. Handy when you're preparing data for production.
Tree View
Explore complex JSON like you're browsing folders. Open and collapse sections to quickly find what you're looking for.
Code Editor
Edit your JSON right in the browser with syntax highlighting and smart autocomplete. No need to open another editor.
Dark Mode
Switch between light and dark mode whenever you want. It's easier on your eyes, especially at night.
How It Works
Three quick steps to clean, validated data.
Paste or Upload
Drop your data into the editor or upload a file. You can also type directly if that's easier.
Pick an Action
Format it to clean things up, minify to compress it, or validate it to check for errors. Switch views anytime.
Copy or Save
Copy the result or download it as a file. Stats and validation info show on the right.
Frequently Asked Questions
What is a JSON Formatter?
It's a tool that cleans up messy, hard-to-read data and makes it properly indented. It adds spacing and line breaks so you can actually see what's going on. It also checks for errors while you work.
Is my data safe?
Everything stays in your browser. Nothing is uploaded to our servers, and your data never leaves your device.
What's the difference between Format and Minify?
Format makes your JSON easy to read by adding spacing and line breaks. Minify does the opposite. It removes everything unnecessary so the file stays as small as possible.
How do I fix syntax errors?
Paste your JSON and the tool flags issues instantly. You'll see line numbers and explanations for missing commas, brackets, or quote problems. Fix what's highlighted and you're good. If your file is badly broken, you can also try the JSON Repair tool.
Can I upload files?
Yes. Upload any file and it loads instantly. You can format, validate, or browse it.
What's Tree View for?
Tree View shows your data like a file explorer. It's great for nested JSON where scrolling through raw text gets messy.
Do I need an account?
No. The tool is free to use. No sign-ups, no email, no tracking.
What's in the Statistics panel?
It shows character count, line count, file size, nesting depth, and how many keys, objects, and arrays are in your JSON.
Works with API responses?
Yes. Paste your API response to inspect it and validate it for issues.