Does minifying change data?

No—only whitespace is removed.

Minify requires valid JSON first; use the validator to debug syntax.

Use the JSON formatter after minifying.

Unicode in strings is preserved.

JSON Minifier Online – Compress JSON to One Line

Paste formatted JSON to minify it for smaller request bodies, storage, or transmission.

JSON input

Minified JSON

Enter JSON to minify.

Valid JSON is parsed and stringified without extra spaces or line breaks.

Data values stay the same; only whitespace is removed.

Smaller payloads save bandwidth; minified JSON is harder for humans to read.

Minification runs in your browser only.

Does minifying change data?: No—only whitespace is removed.
Invalid JSON?: Minify requires valid JSON first; use the validator to debug syntax.
Pretty-print again?: Use the JSON formatter after minifying.
Unicode?: Unicode in strings is preserved.