Secure Offline HAR Analyzer
Inspect HTTP Archive files, debug load time latency waterfalls, and redact sensitive authentication headers before sharing logs.
Drag and drop your HAR file here
or click to browse local files (supports .har extension)
Why Use an Offline Sanitizer?
Web archives hold live keys that should never be sent to third-party databases.
Absolute Privacy
HAR files are not clean lists; they contain bearer tokens and session keys. Running analysis locally blocks accidental leaked credentials.
Waterfall Timeline
Visually debug network phases (DNS, TTFB, downloading latency) directly in the SVG waterfall grid layout.
Instant Redactor
Our filter strips authorization strings and sensitive keys client-side, downloading a sanitized file copy in seconds.
MIME Type Filters
Toggle rapidly between documents, styling sheets, code scripts, and API payloads for smooth troubleshooting.
Frequently Asked Questions
Why is a local offline HAR viewer safer than online viewers?
HAR (HTTP Archive) files store complete network logs of your browser session, which often contain private session cookies, API tokens, Authorization headers, and personal login data. Online viewers require uploading these files to their servers, posing significant security risks. Our HAR Analyzer parses, searches, and filters logs 100% inside your browser's local memory. No data is ever uploaded.
How does the credential redactor/sanitizer work?
Our redactor traverses the internal HAR log structure in memory. It scans headers, cookie arrays, query parameters, and JSON request bodies for keys containing words like token, key, password, authorization, or cookie. If found, their values are replaced with '[REDACTED_BY_LOCAL_HAR_ANALYZER]', and a clean, safe HAR file is compiled for download entirely client-side.
What types of vehicle or data archives does it support?
It supports standard HTTP Archive (HAR 1.2) log files generated by all major web browsers including Google Chrome, Mozilla Firefox, Microsoft Edge, and Apple Safari.