JSON Minifier - Compress JSON Files Online

Remove whitespace from JSON to reduce file size. Fast minification with size stats. Browser-based, no uploads.

Input JSON

Minified Output

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Frequently Asked Questions

JSON minification removes all unnecessary whitespace, line breaks, and indentation from JSON files while preserving the exact data structure. This reduces file size without changing functionality.

Typically 15-30% smaller, depending on how much indentation and whitespace the original contained. Pretty-printed JSON with 2 or 4-space indentation sees the biggest reduction.

No. Minification only removes cosmetic whitespace. The data structure, values, and syntax remain identical. The minified JSON parses to the exact same object.

Minify JSON for API responses, configuration files sent over networks, or embedded JSON in web pages. Keep formatted versions for development and debugging.

Yes. All processing happens entirely in your browser. No JSON data is uploaded to any server or stored anywhere.

Yes. Use a JSON formatter or pretty-printer to restore indentation and line breaks. The data is identical, you're just adding whitespace back.

The minifier will detect invalid JSON and show an error message. It uses the browser's native JSON parser to ensure correctness.

Standard JSON doesn't support comments. If your file has comments (JSON5 or JSONC), they may cause parsing errors. Use a JSON5-compatible tool instead.

Yes. The browser can handle files up to several megabytes. For extremely large files (100MB+), performance may vary depending on your device.

All Unicode characters are preserved exactly as-is. The minifier doesn't escape or modify character encoding, maintaining full UTF-8 compatibility.

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