JSON Compressor

JSON

Loading JSON Compressor

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JSON Compressor runs on your device

Runs in your browser

No uploads.There is no file-upload endpoint on duck.tools. This tool process your input inside this browser tab.
No tracking.No analytics and no tracking cookies. Sign-in uses a session cookie and loads Cloudflare Turnstile only when you open the account dialog.
We never see your data.Your file never reaches a Duck Tools server, so there is nothing for us to store, read or leak.

Minifying happens in this page. Your JSON stays in memory and is discarded when you leave.

To be precise: your browser still downloads this page, its scriptsover the network, and our web server keeps standard access logs. What never travels is the content you put into a local tool.

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JSON Compressor

Minify JSON, optionally drop empty values and trim string whitespace.

Collapse JSON to a single line. Optionally remove empty strings, empty arrays, empty objects and null, and trim whitespace inside strings. See how many bytes you save. Nothing is uploaded.

How it works

Paste JSON or load a file.
Turn on Remove empty values to drop null, empty strings, arrays and objects.
Turn on Trim whitespace to tidy string values.
Copy or download the minified result and compare the byte counts.

Also known as

json
minify
compress
empty
trim
whitespace

Related tools

JSON FormatterPretty-print JSON and inspect it as text or a collapsible tree.
JSON ConverterConvert JSON to YAML, XML, CSV, TSV, NDJSON or dotted keys.
JSON ValidatorCheck JSON syntax and see the line, column and a short hint.

LOCALRuns in your browser

No uploads.There is no file-upload endpoint on duck.tools. This tool process your input inside this browser tab.
No tracking.No analytics and no tracking cookies. Sign-in uses a session cookie and loads Cloudflare Turnstile only when you open the account dialog.
We never see your data.Your file never reaches a Duck Tools server, so there is nothing for us to store, read or leak.

Minifying happens in this page. Your JSON stays in memory and is discarded when you leave.

To be precise: your browser still downloads this page, its scriptsover the network, and our web server keeps standard access logs. What never travels is the content you put into a local tool.

More json tools →Full privacy page →