All-in-One Tools Logo

HAR Viewer

Paste a HAR (HTTP Archive) JSON or upload a .har file to view a basic request waterfall.

HAR JSON
Entries: 0 • Total span: 0 ms
Waterfall
Request
Timeline
No entries loaded

Frequently Asked Questions about Online HAR Viewer

Why Use Our Free Online HAR Viewer?

Free HAR analysis in your browser

Our free online har viewer provides free har analysis in your browser for all users.

Privacy-first: no uploads or tracking

Our free online har viewer provides privacy-first: no uploads or tracking for all users.

Instant timeline waterfall visualization

Our free online har viewer provides instant timeline waterfall visualization for all users.

Quickly spot slow or failing requests

Our free online har viewer provides quickly spot slow or failing requests for all users.

Works offline once loaded

Our free online har viewer provides works offline once loaded for all users.

Mobile-friendly interface

Our free online har viewer provides mobile-friendly interface for all users.

How to Use the Free Online HAR Viewer

Step 1: Input Your Data

Enter your data in the input field. Our free online har viewer accepts various formats and provides real-time validation.

Step 2: Process Instantly

Click the process button and get instant results. Our free online har viewer works in real-time without any delays.

Step 3: Copy or Download

Copy the results to your clipboard or download them as a file. Your data is processed securely and never stored.

Step 4: Share Results

Share your results with colleagues or save them for future reference. Our free online har viewer makes collaboration easy.

Perfect for Debugging slow page loads, Analyzing third‑party scripts impact, Troubleshooting HTTP errors, Sharing reproducible network traces, Performance audits and QA, Teaching HTTP request lifecycles

Debugging slow page loads

Our free online har viewer is ideal for debugging slow page loads and provides professional-grade results.

Analyzing third‑party scripts impact

Our free online har viewer is ideal for analyzing third‑party scripts impact and provides professional-grade results.

Troubleshooting HTTP errors

Our free online har viewer is ideal for troubleshooting http errors and provides professional-grade results.

Sharing reproducible network traces

Our free online har viewer is ideal for sharing reproducible network traces and provides professional-grade results.

Performance audits and QA

Our free online har viewer is ideal for performance audits and qa and provides professional-grade results.

Teaching HTTP request lifecycles

Our free online har viewer is ideal for teaching http request lifecycles and provides professional-grade results.

Free Online HAR Viewer Features

Paste HAR JSON or upload .har files
Waterfall timeline with relative offsets
Method, host, path, status, duration, size
Local-only parsing, no server required
Sorted by start time for easy scanning
Basic summary of total entries and span
Clean, responsive UI
Works with standard HAR format

About Our Free Online HAR Viewer

Our free online har viewer is a powerful, completely free tool designed for developer tools and professionals. Whether you're a developer, student, or business owner, our free online har viewer provides instant, accurate results without requiring any registration or payment. Use our free online tools with confidence!

The free online har viewer is built with modern web technologies to ensure fast performance and reliable results. Our free online tool works directly in your browser, processing your data locally for maximum security and privacy. No data is ever stored on our servers, making it perfect for sensitive information.

Thousands of users trust our free online har viewer for their daily developer tool needs. From simple tasks to complex operations, our free online tool handles everything with precision and speed. Try our free online har viewer today and experience the difference! Join millions using our free online tools!