JSON Validator, Formatter & Viewer

Validate, format, minify, and visualize JSON — with file import support (JSON, TXT, JS). Fast, accurate, and works entirely in your browser.

Free online JSON validator, formatter, minifier, and viewer with file upload support (JSON, TXT, JS). Detect errors with line and column numbers. Works fully in your browser with no data uploaded.

How to Use the Pro JSON Validator, Formatter & Viewer Tool

This advanced development utility provides real-time client-side analysis and verification for nested JSON structures. Simply paste your raw text strings, drag and drop files directly into the editor viewport, toggle optional clearing parameters like sorting object keys alphabetically or stripping null values, and view complex data blocks inside an interactive expandable tree graph with absolute 100% security[cite: 27].

Key Technical Layout Normalization Features

Granular Error Tracking: Instantly locate syntax formatting failures with exact line numbers and column index metrics mapped visually[cite: 27].
Interactive Tree Graph: Visualize deep database trees, toggle nodes visibility, and isolate targeted keys using real-time DOM filtering utilities[cite: 27].
Advanced Code Compressing (Minification): Strip out spaces and horizontal tabs breaks to generate compressed minified payloads ready for server deployment[cite: 27].