Format, Validate & Beautify JSON Instantly

Paste or upload your JSON to instantly format it with proper indentation, validate its syntax, or minify it for production. JSONCraft detects errors in real time and shows the exact line and column. Supports 2-space, 4-space, and tab indentation.

About this tool

JSONCraft's formatter instantly validates, beautifies, and minifies your JSON. Paste or drop a file and get real-time syntax validation with clear error messages pointing to the exact line and column.

Format with 2 spaces, 4 spaces, or tabs
Minify JSON to a single compact line
Real-time validation as you type
Upload .json files or drag and drop
Download formatted results

100% client-side. Your data never leaves your browser. No tracking, no cookies.