Format, validate and minify JSON in your browser. Paste, prettify, copy: nothing is uploaded.
FeedbackAstralJSON's Prettify tool helps developers format messy JSON strings into readable, well-structured code. Features include indentation control, syntax validation, and minification functionality to compress JSON for production.
Paste or type your raw JSON into the input editor.
Click 'Format' to apply clean, indented formatting.
Use 'Minify' instead if you need a single compact line.
Copy the result with one click or clear it to start again.
Minified or hand edited JSON is hard to read and easy to break. Prettifying restores consistent indentation and spacing so structures are obvious at a glance, all without sending a single byte to a server.
Consistent indentation makes nested objects and arrays easy to scan and review.
Formatting parses your JSON first, so syntax errors surface before they reach production.
Everything runs locally in your browser. Your JSON never leaves your device.
Validate JSON and jump to the exact line and column of each error, locally in your browser.
Explore large JSON as a collapsible tree in your browser. Search keys and values; nothing is uploaded.
See the differences between two JSON documents side by side, computed locally in your browser.