Convex Tools

HAR File Viewer

Fast, free, open source, ad-free tools.

No file chosen. Drop your .har or .json file here to analyze.

Use our free HAR file viewer to instantly upload and inspect your HAR (HTTP Archive) files online. Whether debugging network performance or analyzing web traffic, this tool helps you diagnose issues faster.

PS. Scroll down for even faster debugging.

How to View HAR Files Online

  • Upload your HAR files instantly and start analyzing them online.
  • Navigate the entries: Review all network requests made during the session.
  • Examine request details: Click any entry to see headers, payload, and response.
  • Analyze timings: DNS lookup, connection, SSL handshake, response time.
  • Identify issues: Spot failed or slow requests and inspect headers and payloads.
  • Export data: Save for further analysis or sharing with your team.

How to Create a HAR File

  1. Navigate to the page where the issue occurs.
  2. Open Developer Tools (Chrome: View → Developer → Developer Tools or right-click → Inspect).
  3. Select the "Network" tab and check "Preserve log".
  4. Stop existing recording and clear logs to start fresh.
  5. Start a new recording and reproduce the issue.
  6. Click the "Export HAR" button to save the file.

Detailed steps for Edge, Safari, and Firefox are available on our site.

Meet Convex Converter: Everything in a HAR File + More in 1 Click

Skip the manual process of generating HAR files — let Convex Converter do the work for you. With Convex Converter’s browser extension, you get everything a HAR file offers plus automatic steps to reproduce, metadata, and AI-powered debugging assistance.

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How to Use the HAR Analyzer for Debugging

  • Upload: Drag and drop your HAR file or click to upload.
  • Navigate entries: Review all network requests.
  • Examine request details: Headers, payload, response.
  • Analyze timings: DNS, connection, SSL handshake, response time.
  • Identify issues: Failed requests or long durations.
  • Export data: Share or analyze further.

FAQs

  • What is a HAR file? A HAR (HTTP Archive) file logs all web requests and responses during a session.
  • What is a HAR file viewer? It lets developers inspect and visualize data captured in HAR files.
  • Can I analyze HAR files with this tool? Yes, it works as both a viewer and analyzer.
  • How to open a HAR file? Upload to this viewer or open with a text editor / browser dev tools.
  • How to analyze a HAR file? Review HTTP status, load times, request timings, and failed requests.
  • What is a HAR file used for? Debug web traffic and analyze network performance.
  • How to get a HAR file in Chrome? Use Chrome DevTools → Network tab → Preserve log → Record → Export HAR.