How much smaller will my JSON get?

Indented JSON usually loses 20–50%, since most of the removed bytes are leading spaces. The exact figure for your document is shown after each run.

Is minified JSON still valid?

Yes. Whitespace between tokens is insignificant in JSON, so it parses identically to the formatted version.

Is this the same as gzip?

No. Minifying removes whitespace; gzip and Brotli compress the bytes that remain. Transport compression stacks on top and saves considerably more.

Are keys, numbers or strings rewritten?

No. Key names and string contents are untouched and numbers keep their original representation. Only the space between tokens goes.

Can I get my formatting back?

Press Format to re-indent, or Ctrl+Z (Cmd+Z) to recover the original text exactly.

JSON Kitchen

Minify JSON and see what you saved

Whitespace removed, savings measured in real UTF-8 bytes.

Paste JSON

or drag & drop a JSON file

Empty document

UTF-8Lines 0Characters 0

What it does

Minifying removes everything a parser ignores — indentation, line breaks, the spaces after colons and commas — leaving the same document in the fewest characters. That is what you want in a request body, an environment variable or a database column.

Example

Formatted

{
  "id": 42,
  "tags": [
    "a",
    "b"
  ],
  "ok": true
}

Minified

{"id":42,"tags":["a","b"],"ok":true}

Highlights

Reports size before, size after and the percentage saved
Sizes counted in UTF-8 bytes, so multi-byte characters count properly
Lossless: the minified document parses to the same value
Format reverses it; Ctrl+Z undoes it outright
Invalid input is reported instead of being mangled

Frequently asked questions

How much smaller will my JSON get?: Indented JSON usually loses 20–50%, since most of the removed bytes are leading spaces. The exact figure for your document is shown after each run.
Is minified JSON still valid?: Yes. Whitespace between tokens is insignificant in JSON, so it parses identically to the formatted version.
Is this the same as gzip?: No. Minifying removes whitespace; gzip and Brotli compress the bytes that remain. Transport compression stacks on top and saves considerably more.
Are keys, numbers or strings rewritten?: No. Key names and string contents are untouched and numbers keep their original representation. Only the space between tokens goes.
Can I get my formatting back?: Press Format to re-indent, or Ctrl+Z (Cmd+Z) to recover the original text exactly.

Back to the editor

JSON Kitchen

Minify JSON and see what you saved

Whitespace removed, savings measured in real UTF-8 bytes.

Paste JSON

or drag & drop a JSON file

Empty document

UTF-8Lines 0Characters 0

What it does

Example

Formatted

{
  "id": 42,
  "tags": [
    "a",
    "b"
  ],
  "ok": true
}

Minified

{"id":42,"tags":["a","b"],"ok":true}

Highlights

Reports size before, size after and the percentage saved
Sizes counted in UTF-8 bytes, so multi-byte characters count properly
Lossless: the minified document parses to the same value
Format reverses it; Ctrl+Z undoes it outright
Invalid input is reported instead of being mangled

Frequently asked questions

How much smaller will my JSON get?: Indented JSON usually loses 20–50%, since most of the removed bytes are leading spaces. The exact figure for your document is shown after each run.
Is minified JSON still valid?: Yes. Whitespace between tokens is insignificant in JSON, so it parses identically to the formatted version.
Is this the same as gzip?: No. Minifying removes whitespace; gzip and Brotli compress the bytes that remain. Transport compression stacks on top and saves considerably more.
Are keys, numbers or strings rewritten?: No. Key names and string contents are untouched and numbers keep their original representation. Only the space between tokens goes.
Can I get my formatting back?: Press Format to re-indent, or Ctrl+Z (Cmd+Z) to recover the original text exactly.

Back to the editor

Minify JSON and see what you saved

What it does

Example

Highlights

Frequently asked questions

Related tools

Minify JSON and see what you saved

What it does

Example

Highlights

Frequently asked questions

Related tools