JSON Formatter

A JSON formatter is an online tool that transforms raw, compact JSON data into a structured, readable format with proper indentation and line breaks. It helps developers quickly understand complex data structures, debug API responses, and prepare JSON for documentation.

Our JSON formatter goes beyond simple beautification — it includes validation, minification, tree visualization, diff comparison, and format conversion, all running securely in your browser.

1. Paste or type your JSON — enter your data in the editor, or drag and drop a .json file.
2. Click Format — the tool beautifies your JSON with your chosen indentation (2 spaces, 4 spaces, or tabs).
3. Explore the tree view — switch to the Tree tab to navigate your data visually and find JSON paths.
4. Compare two JSONs — use the Diff tab to see differences highlighted line by line.
5. Convert formats — export your JSON as CSV, XML, YAML, or TypeScript interfaces.

JSON validation checks whether your data conforms to the JSON specification (RFC 8259). Common errors include trailing commas, single quotes instead of double quotes, unquoted keys, and missing brackets.

Our validator runs in real time as you type, instantly highlighting syntax errors with the exact line number so you can fix issues quickly.

Formatting and minifying serve opposite purposes:

• Format (Beautify) — adds indentation and newlines for readability. Use when editing, debugging, or reviewing JSON.
• Minify (Compress) — removes all unnecessary whitespace. Use to reduce file size for API payloads, configuration files, or network transfers.

Both operations preserve the data exactly — only whitespace changes.

This tool converts JSON to four popular formats:

• CSV — ideal for spreadsheets and data analysis. Nested objects are flattened with dot notation.
• XML — useful for systems that require XML input or SOAP APIs.
• YAML — commonly used in DevOps tools like Docker Compose, Kubernetes, and CI/CD pipelines.
• TypeScript — generates type-safe interfaces from your JSON structure, perfect for frontend development.

• Always validate before using — a single missing comma can break your entire application.
• Use the tree view to explore large, deeply nested structures without getting lost in brackets.
• Copy JSON paths — click a key in the tree to get its path, making it easy to reference in code.
• Save to history — formatted JSONs are automatically saved locally for quick access later.
• Keep it private — this tool processes everything in your browser, so sensitive data never leaves your device.