JSON Formatter
Format and validate JSON with proper indentation.
🔧 Formats and pretty-prints JSON with 2-space indentation. Validates syntax — errors show with a message.
What Is This Tool?
This tool formats and validates JSON. Paste minified or messy JSON and get back properly indented, human-readable output. Syntax errors are reported with a message.
Why Format JSON?
- Debugging API responses
- Reading configuration files
- Reviewing large payloads during development
- Catching syntax errors before deployment
Common JSON Errors
- Trailing commas (not allowed in strict JSON)
- Single quotes instead of double quotes
- Comments (JSON doesn't support them)
- Unquoted keys
Frequently Asked Questions
JSON vs JSON5 vs JSONC?
Standard JSON is strict. JSON5 allows comments, trailing commas, and unquoted keys. JSONC is JSON with comments (used by VS Code). This formatter expects standard JSON.
About the JSON Formatter
The JSON Formatter handles json formatterdirectly in your browser. Paste or type your input, and the tool processes it instantly — no upload, no signup, no waiting. It's built for the moments when you need a quick transformation and don't want to leave your workflow.
Because the tool runs client-side, it's fast and private. Your text never touches a server, which makes it safe for sensitive content. The interface is keyboard-friendly and works on any device with a modern browser.
How to Use This Tool
- Paste or type your input into the text area.
- Adjust any options the tool offers.
- The output updates automatically as you type or change options.
- Copy the result using the copy button.
Why Use an Online Tool?
Browser-based tools like this one have a few real advantages over installed software or manual methods:
- No installation. It opens instantly in any browser, on any operating system.
- Private by default. Everything runs locally, so your data stays on your device.
- Always up to date.There's nothing to update — you always get the latest version when you load the page.
- Free and unlimited. Use it as often as you like, with no account and no caps.
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