JSON Formatter & Beautifier

Yes — the formatter includes smart auto-fix logic. If your JSON has common issues like missing closing brackets or braces, trailing commas, or incomplete structure, it will detect and fix them automatically, showing you exactly what was corrected. You can apply the fix to the input with one click.

Clicking Prettier formats your JSON in-place using Prettier's default style: 2-space indentation and clean, consistent structure. It also applies any available auto-fixes before formatting. This is ideal when you want to commit clean JSON to version control.

Minifying JSON removes all whitespace, newlines, and indentation to produce the most compact representation possible. This reduces file size, which is useful for network transmission or storage.

Sorting keys alphabetically orders all object keys A–Z at every nesting level. This is useful for comparing two JSON objects, normalizing API responses, or producing deterministic output for version control.

2 spaces is the most common convention (used by Prettier, JavaScript, Node.js, npm). 4 spaces matches Python and many style guides. Tabs are preferred in some codebases for accessibility and configurable visual width.

Yes — all processing happens entirely in your browser using JavaScript. Your JSON is never sent to any server or stored anywhere.

JSON has strict syntax rules: keys must be double-quoted strings, trailing commas are not allowed, and values must be strings, numbers, booleans, null, arrays, or objects. The error message pinpoints exactly where the syntax breaks. Use the auto-fix feature to resolve common issues automatically.