HAR Analyzer

Use HAR Analyzer tool as a HAR file analyzer and .HAR file viewer to inspect requests, errors, timings and domains locally in Chrome

🔎 HAR Analyzer — inspect browser requests locally The HAR Analyzer Chrome extension helps developers, QA engineers and support teams investigate page loads. Upload an archive or capture activity from the current tab, then review requests, failures, sizes, timings and domains in one side panel. This HAR file analyzer turns an HTTP Archive into a diagnostic workspace. Use the requests table and domain breakdown to find likely problems. It also serves as a HAR report analyzer for a developer handoff. Analysis runs on your device without uploading trace data to a server. 📌 What does an HTTP Archive contain? A browser recording can include URLs, methods, status codes, resource types, sizes and timings. A HAR viewer makes this data easier to inspect. Use HAR analyzer to investigate slow pages and failed API calls without copying sensitive logs into an external website. 🚀 Key features ➤ Opening HAR files: drag and drop or use the picker ➤ Analyze HAR file requests in a normalized table ➤ Use the HAR file reader to inspect method, URL, host, status, type, size and duration ➤ Search entries and filter by status or resource type ➤ Group HAR logs by domain, bytes and failures ➤ Detect slow requests, redirects and large assets ➤ Flag caching issues, duplicates and heavy third-party domains ➤ Generate a copy-ready local brief with affected URLs ➤ Capture available network data from the current Chrome tab 🧩 Two analysis workflows 1️⃣ Open a saved trace with HAR analyzer Drop an archive into the panel. The .HAR file viewer parses it locally and opens Overview, Requests and Domains, with a copy-ready Brief in Overview. Start here when a teammate sends a browser DevTools export. 2️⃣ Record a page or interaction Use the Chrome HAR analyzer to inspect the current tab. Choose Reload & capture for a clean page-load trace, or Start capture to record from the current moment. Finish capture to run diagnostics. Live mode creates a partial browser trace and may not include response bodies or every low-level timing field. 📊 Find issues that matter The HAR analyzer tool narrows a recording to useful evidence: • Failed requests and HTTP error statuses • Slow resources and the slowest completed request • Redirects that add extra network steps • Large scripts, images, fonts or other assets • Static resources with weak caching • Duplicate resource URLs • Heavy third-party domains and transferred bytes This HAR file analysis with HAR analyzer has clear boundaries: - It is not a generic SEO score - It is not a system-wide packet sniffer - It analyzes imported data and information Chrome exposes for the selected tab 📄 Requests, domains and a clear brief Review the result in HAR analyzer in three steps: 1. Use Requests to view HAR file entries, status, duration and available timings 2. Check Domains for hostname, request count, bytes and failures 3. Expand the Brief in Overview for a local Markdown summary with recommendations and affected URLs 💡 HAR analyzer in everyday debugging ▸ Investigate a slow or failing page reported by a user ▸ Review API errors and unexpected status codes ▸ Find large resources and third-party network costs ▸ Use the HAR file analyser to check redirects and caching signals ▸ Inspect a checkout, login or other multi-step browser flow For support teams, a HAR log analyzer connects reported symptoms to URLs and statuses. Copy the brief into a developer handoff, then examine the evidence behind each finding. Results depend on what the HAR trace contains. 🔒 Local and privacy-conscious processing Uploaded archives, available headers and trace data are processed on your device. No account is required. Use HAR Analyzer offline with a saved recording; live capture depends on the page being tested. The HAR analyser builds the Brief with local rules. This version does not send data to an external AI service or analyze unavailable response bodies. ❓ Frequently asked questions ❓ Can I open HAR file exports from a teammate? 💡 Open the side panel, then drag in the document or use the picker. The HAR reader displays normalized results automatically. ❓ Can HAR analyzer inspect a page without an exported recording? 💡 Yes. Start capture for the current tab or reload with capture enabled, then finish the trace to see results. ❓ Is live capture identical to a DevTools export? 💡 No. Some headers, response bodies and low-level timings may be unavailable. Findings reflect the data Chrome provides. ✨ Start analyzing Install HAR analyzer, open a saved HTTP Archive or capture a browser flow, and turn request data into an organized view of failures, timings, resources and domains.