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HAR analyzer

HAR file analyzer

See what failed and what’s secret in a HAR file, then download a copy with the secrets redacted. Nothing leaves your browser.

Drop a HAR file hereCheck a HAR file

It’s read in this tab and never uploaded.

Or capture this automatically. Snags attaches the failed requests to every comment.

See how

What it checks. And what it changes in the copy.

Secrets become REDACTED and their names stay, so the copy still opens in any HAR viewer.

Cookies and auth headers, values redacted, names kept.

Tokens in URLs and bodies, JWTs and API keys included.

Every failed request, in the order they happened.

Questions, answered.

No. Your browser reads it, and nothing in it is sent anywhere. Once the page has loaded, it even works offline.

Guides

All guides
HAR filesWhat is a HAR file? How to make, read and share one safelyConsole and dev toolsWhat is a stack trace? How to read one in JavaScriptConsole and dev toolsWhat is a source map? How browsers find them and when to ship them