Format and Validate JSON Instantly
JSON is the backbone of modern AI workflows — from API responses and configuration files to fine-tuning and RAG datasets. When JSON arrives minified or poorly structured, it becomes hard to read, debug and maintain. A formatter turns it into a clean, indented structure at a glance.
Beautify with Custom Indentation
Choose between two-space, four-space or tab indentation to match your project's coding style. The output is syntax-highlighted so keys, strings, numbers, booleans and null values are immediately distinguishable.
Validate and Locate Errors
Invalid JSON — a missing comma, an unclosed brace or a trailing comma — can break an entire pipeline. The built-in validator reports the exact line and column of any syntax problem, so you can fix it without hunting through the whole document.
Minify for Production
When payload size matters, switch to minify mode to remove all unnecessary whitespace and produce the most compact representation of your data.
Sort Keys for Consistency
Enable key sorting to normalize objects recursively, which is useful for diffing JSON files, creating deterministic outputs and keeping large configuration objects organized.
Private and Offline-Ready
Everything runs client-side. Your JSON is processed using your browser's own JavaScript engine and never uploaded, making the tool safe for sensitive data.