Web & URLs
HAR file viewer
Inspect HAR captures with timings, sizes, MIME types, and per-request headers.
A HAR file records network activity from a browser session—URLs, status codes, timings, headers, and bodies when included. Export one from Chrome DevTools (Network → Preserve log → Export) and paste the JSON here. You get a capture summary, sortable-style columns (total time, wait, receive, size, content type, host, path), a quick filter, and an expandable row for full URL, query string, timing breakdown, request/response headers, and body previews. For step-by-step capture instructions, see your browser’s documentation.
Similar tools
Quick links to related utilities—same workflow, different input or output.
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FAQs
What is a HAR file?›
HTTP Archive format—JSON describing requests and responses captured while a page loaded. Essential for debugging slow loads, failed calls, and CORS issues.
Is HAR data sensitive?›
Very. Cookies, auth headers, and response bodies may appear. Share only with people who need it and redact secrets.
How do I create a HAR in Chrome?›
Open DevTools → Network, enable Preserve log, reproduce the issue, then Export HAR from the network panel menu.
Does this replace DevTools?›
No—it gives a shareable table plus expandable details. Deep inspection still happens in the browser or specialized tools.
Can I analyze timings here?›
This viewer lists methods, status, and URLs. Fine-grained waterfall timing may require DevTools or other analyzers.
General
Do these tools send my data to Exemplar’s servers?›
By default, conversion and formatting run entirely in your browser. Nothing is uploaded to Exemplar for normal paste-and-transform workflows. Tools that deliberately open an external service (for example, a third-party speed test) are called out on the page.
Do I need an account or install anything?›
No account is required. Everything runs in the browser—there is nothing to install for these utilities. They complement the Exemplar platform but work standalone.
Are these utilities open-source or the same as other sites?›
These pages are built for Exemplar’s audience (developers working with APIs, config, and ops data). Behavior may differ slightly from other online tools; always verify critical output in your own environment.
Are there size or performance limits?›
Very large inputs can slow down or crash the tab—especially for images, huge JSON, or multi‑MB HAR files. For production-scale data, prefer local CLI tools, streaming parsers, or your own pipelines.
Can I use output in production?›
Yes, when you have validated it. Parsers and formatters here aim to be helpful for everyday tasks but are not a substitute for tests, schema validation, or security review where it matters.
Where can I read more about privacy?›
See our Privacy policy at /privacy for how exemplar.dev handles site analytics and general data practices.