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JSON Minifier Online
Remove unnecessary whitespace from valid JSON.
Create a compact JSON representation without changing the parsed data. Paste the input, make the change, then read the result before you copy it elsewhere.
Compression over HTTP may reduce the real network benefit further.
Ready — input is processed locally.
This utility runs on the current device for the supported workflow. Kaazo does not need the pasted input to calculate the result.
JSON Minifier: the job it actually does
Create a compact JSON representation without changing the parsed data.
Valid JSON is stricter than JavaScript object syntax
Quoted property names, legal escape sequences and balanced arrays/objects matter. Comments, trailing commas or unquoted keys may look familiar in code but aren’t valid JSON.
Minify only valid JSON.
When JSON Minifier isn’t the right endpoint
Use a JavaScript formatter when the input is JavaScript rather than JSON. Formatting can improve readability, but it can’t make semantically wrong data correct.
Example and result checks
An object such as {"name":"Asha","active":true} can be stored without spaces or line breaks, but the underlying keys, string values and boolean should remain the same. Compare the parsed result rather than counting characters. JSON strings can contain escaped quotation marks, so simple find-and-replace whitespace removal is not a valid substitute for parsing.
A compact result may be better for transmission, while a formatted copy is easier to review and debug. If the input contains comments, a trailing comma or undefined, it is not standard JSON; identify the source format before deciding whether to correct it or send it to a JavaScript-specific tool.
FAQ
What does JSON Minifier actually do?
Create a compact JSON representation without changing the parsed data.
What should I check before I use the output?
Quoted property names, legal escape sequences and balanced arrays/objects matter. Comments, trailing commas or unquoted keys may look familiar in code but aren’t valid JSON. Minify only valid JSON.
Does formatted or converted output prove the data is valid for my application?
No. JSON Minifier can perform the syntax or data operation described here, but your application can still impose its own schema, business rules, encoding or security requirements.
Related tools
After JSON Minifier, validate the output before feeding it into another transform. The data-format guide has broader context if you need it.