Free Online JSON Minifier & Compressor
Strip all whitespace from JSON to create compact, minified output. Ideal for reducing payload size in APIs, configuration files, and production builds.
Related Tools
Frequently Asked Questions
What does minifying JSON do?
JSON minification removes all whitespace, newlines, and indentation from a JSON string without changing its data. The result is functionally identical but smaller — ideal for API payloads and production config files.
How much size reduction can I expect?
Typical savings are 20–40% for well-formatted JSON with deep indentation. For JSON with long string values and little whitespace, savings may be smaller.
Is minified JSON valid?
Yes. Whitespace is not semantically meaningful in JSON per RFC 8259. Any standard JSON parser will read minified JSON identically to its formatted counterpart.