HAR File Viewer & Analyzer

View and analyze HAR (HTTP Archive) files online. Inspect network requests, response times, sizes and headers. Useful for debugging web performance.

Your data never leaves your browser

JSON Formatter & Beautifier

Format and validate JSON with syntax highlighting online

JSON File Viewer

Upload and view JSON files as a formatted tree

Frequently Asked Questions

How do I export a HAR file?

In Chrome/Edge: Open DevTools → Network tab → Right-click any request → "Save all as HAR with content". In Firefox: Network tab → gear icon → "Save All As HAR".