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JSON Minifier

Minify, compact, and measure JSON payloads locally for APIs, logs, fixtures, and config snippets.

Input JSON

Paste JSON to validate and compact.

Output

Copy compact or pretty JSON.

Original115 B

Output84 B

Savings27.0%

{"name":"zptools","tools":["json","timestamp","image compression"],"localOnly":true}

主な機能

Compact JSON

Remove whitespace and line breaks from valid JSON payloads instantly.

Size Metrics

Compare original and minified byte counts with savings percentage.

Validation First

Parse JSON before minifying so malformed input is easy to fix.

Copy Output

Copy compact payloads into API clients, tests, and tickets.

Pretty Toggle

Switch between minified and two-space formatted JSON while editing.

Local Only

Everything runs in your browser without uploading JSON to a server.

よくある質問

No. It parses and serializes the same data structure, only changing whitespace.

Yes. Use the pretty output mode when you want a readable two-space formatted result.

No. Parsing and minifying happen locally in the browser.