JSON Code Beautifier
Paste messy, minified, or broken JSON — get it instantly formatted, validated, and analyzed. Shows total key count, nesting depth, file size, and highlights exact error positions for invalid JSON. One-click copy of the beautified output.
The Challenge
Providing useful error messages when JSON parsing fails, and recursively analyzing JSON structure to compute meaningful statistics like total key count and nesting depth.
The Approach
Client-side JSON.parse with try/catch for validation, recursive traversal algorithms for key counting and depth calculation, and Blob-based size estimation. Error messages from the parser are displayed with exact error context.
The Result
A developer tool that formats, validates, and analyzes JSON in milliseconds — eliminating the need for external formatting websites.