JSON formatter / validator
local onlyJSON Formatter and Validator
Paste JSON, validate syntax, pretty-print readable output, or minify it locally in your browser.
FAQ
Is the JSON Formatter processed locally?
Yes. The JSON Formatter runs in your browser so JSON payloads is not uploaded by the tool.
Can I share a JSON Formatter result?
You can copy the current page URL after entering input. The URL preserves the editable input state for reopening.
Does the JSON Formatter save my last input?
The browser can remember the latest input for the same tool using localStorage, with reads performed after hydration.
When should I use this JSON Formatter?
Use it when you need to validate, pretty-print, or minify JSON quickly while reviewing code, API payloads, logs, configs, or snippets.
Can I clear sensitive JSON Formatter input?
Yes. Use the clear control or erase the field, then remove saved site data from your browser if needed.