HAR file viewer

HAR File Viewer

Effortlessly view and analyze HAR (HTTP Archive) files with our free online tool. Debugging network performance has never been easier (or has it?).

Scroll down for a debugging surprise.

Free, Open Source & Ad-free

Upload your HAR file and start analyzing immediately. Made with 💜 by the developers at Jam.

Benefits of Using HAR File Analyzer

HAR files capture a comprehensive record of web requests and responses, making them essential for debugging and analyzing web traffic. They provide invaluable insights into network performance and help troubleshoot issues efficiently.

• Network Requests:
  Inspect all network requests made during a page load.
• Performance Analysis:
  Analyze load times, resource sizes, and more.
• Error Detection:
  Identify and troubleshoot errors in web requests.
• Data Sharing:
  Share with team members or support for collaborative debugging.

How to Create a HAR File

• Navigate to the page where the issue is occurring.
• In the web browser menu (we’re using Google Chrome), choose "View" → "Developer" → "Developer Tools". Or right-click anywhere in your browser window and select "Inspect".
• Select the "Network" tab within the Developer Tools panel.
• Check "Preserve log" to ensure all requests are recorded.
• Stop the current recording by clicking the 🔴 button (it will turn ⚫️).
• Clear existing logs with the 🚫 button to start fresh.
• Start a new recording by clicking the record button (it will turn 🔴).
• Reproduce the issue for HAR capture.
• Once done, click the ⬇ "Export HAR" button to save it.

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

How to View a HAR File

• Web Browser Developer Tools:
  If you don't use our tool, you can view HAR files using various methods. Most modern web browsers like Google Chrome, Firefox, and Microsoft Edge have built-in developer tools that can open and analyze HAR files.
• Text Editor:
  HAR files are essentially JSON files and can be opened in any text editor.
• Browser Extensions:
  There are browser extensions available that can help you analyze HAR files.

How to Read a HAR File

• Upload:
  HAR file analysis is simple with our online viewer. Drag and drop into our viewer or click to upload.
• Navigate the entries:
  Review the list of all network requests made during the session.
• Examine request details:
  Click on any entry to see detailed information, including headers, payload, and response.
• Analyze timings:
  Understand request durations, including DNS lookup, connection, SSL handshake, and response time.
• Identify issues:
  Spot requests that failed or took unusually long. Check headers and payloads for error messages or clues.
• Export data:
  Export the data for further analysis or sharing with your team.

Meet Jam: The Ultimate HAR File

While our HAR file viewer is great and helps you analyze network logs, there's a better way. Imagine having a tool that not only captures all the network requests, responses, and console logs like a HAR file but goes beyond that. Jam auto-includes reproduction steps, custom metadata, and much more—all packaged and ready to go in a link you can share.

All in one single click. It's just a browser extension. It's impossible to get it wrong, click Jam to capture your screen, and that's it.

Never write repro steps again. Never follow up to debug an issue. Just ask your team to report bugs with Jam.

FAQs

• What is a HAR file?
  A HAR (HTTP Archive) file records all web requests and responses during a page load, including detailed information about network performance, load times, and errors.
• How to open a HAR file?
  Use our online viewer to open and analyze your HAR files. Simply upload the file and start viewing detailed network data.
• How to analyze a HAR file?
  Upload to our online viewer to gain comprehensive insights into network requests, load times, errors, and more.
• What is a HAR file used for?
  Debugging web traffic and analyzing network performance, helping developers and QA engineers troubleshoot issues and optimize performance.
• How to get a HAR file in Chrome?
  Open Chrome DevTools (F12 or right-click > Inspect), go to the Network tab, check the "Preserve log" checkbox, and start recording. Then reproduce the issue. Once done, click the export button to save.
• Can I use this tool for debugging?
  Yes, our HAR file reader is useful for debugging web traffic and network performance, providing insights into network requests and responses.