JSON Minifier

Strip all unnecessary whitespace from JSON to its smallest valid form — with an exact before/after size comparison. Data and key order are untouched.

Smallest valid JSON, nothing else changed

Minifying removes every space, tab and line break that sits between tokens — the whitespace that exists only for human eyes. Whitespace inside string values is data and is always preserved. The result is the same document in its smallest valid form, and the stats line reports the exact byte reduction.

Worked example

{
  "product": "Laptop Stand",
  "price": 51.25,
  "tags": [ "office", "desk" ]
}

becomes:

{"product":"Laptop Stand","price":51.25,"tags":["office","desk"]}

When to use it

• Shrinking payloads before embedding them in code, environment variables or data attributes.
• Preparing fixtures where size matters more than readability.
• Normalizing JSON to single-line form for log pipelines that expect one record per line.

Limitations to know

• Minification is not compression — for network transfer, servers gzip/brotli JSON anyway, and the Size Calculator shows how the forms compare.
• The input must be valid JSON; errors come back with line and column.

Common questions in practice

• Reversing it — the JSON Formatter restores readable indentation at any time; minification loses nothing.
• Escaped characters — sequences like \n inside strings are content, not formatting, and pass through untouched.

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