JSON Minifier
Remove every unnecessary space and newline from JSON to shrink API payload size. Instant, browser-only.
JSON Minifier strips every unnecessary space, tab, and newline from JSON so the payload is as small as possible. ConvertDa's free JSON Minifier runs in your browser — useful for shrinking API request/response bodies, config files, or anywhere bandwidth matters.
How to json minifier
- 1
Paste your JSON into the input area.
- 2
Click Minify.
- 3
Copy the compacted output and see how much smaller it is.
Frequently asked questions
Is minified JSON still valid?▾
Yes. Whitespace in JSON is purely cosmetic — minified JSON parses identically.
How much smaller will it be?▾
Depends on how much whitespace was in the original. Pretty-printed JSON typically shrinks 30-50% when minified.
Does it remove anything else?▾
No — only whitespace. Keys, values, and structure stay exactly the same.
Is the minified JSON still equivalent to the original?▾
Yes. Whitespace in JSON has no semantic meaning, so the minified version parses to the exact same data structure. Only the byte count changes.
How much smaller will my JSON get?▾
Typically 30-50% for pretty-printed input. The savings depend on how much indentation you had — heavily indented files compress more.