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HAR Analyzer

Free, no signup. Drop in a browser network capture to inspect failures, redirects, transfer weight, timings, caching, third parties, and tag evidence. The raw HAR never leaves this tab.

Built by Patrick Stox

Local cap: 50 MiB and 5,000 entries. Request/response bodies, cookies, sensitive header values, and query values are never included in the report.

Runs entirely in your browser — nothing you paste is uploaded or stored. The HAR and its analyzed contents are not uploaded. Close the tab to discard the imported capture. Anonymous run-level outcome counters may be used for aggregate research; URLs, domains, IPs, and identifiers are never included, and no statistic is released below 100 runs.

Feedback
Report a bug

Found something broken in Har Analyzer? Let us know what happened — this goes straight to a private triage queue, not a public list.

What will be sent 
 No tool inputs, uploads, pasted source, complete results, query parameters, or URL fragments are attached automatically. You can edit or remove the selected passage above. Browser and anti-abuse metadata is processed for spam prevention. 
  
 
  
 
 
  
 
 
  
 
How to use it
  1. Export a HAR with content from your browser’s Network panel.
  2. Select the file and analyze it locally.
  3. Review failed requests, redirects, third parties, resource weight, cache evidence, and detected tag requests.
  4. Download the sanitized JSON report when you need to share evidence. Never share the original HAR without reviewing it separately.
 
     
 Local data 
Saved targets, named lists, and recent check summaries remain only in this browser.
 
   
 
      
Sample report
A typical report groups requests by resource type, lists third-party hosts, and surfaces failed requests, redirectsA redirect sends browsers and crawlers from a requested URL to a different one. An HTTP redirect specifically is a 3xx status code paired with a Location header; meta refresh and JavaScript redirects achieve a similar navigation without being a 3xx response themselves. Permanent redirects (301/308) are Google's signal the target should be canonical; temporary ones (302/303/307) aren't., and explicit cache missesCaching stores a copy of a page or resource — in a browser, a CDN edge node, or a search crawler's own cache — so it can be served again without regenerating or re-downloading it. It isn't a direct ranking factor, but it feeds page speed and crawl efficiency. for review. The values always come from the selected HAR; this sample description is not a benchmark.
How it works
The browser reads the HAR locally, validates its shape and limits, removes sensitive URL and header values, then classifies the bounded request entries. No request or response bodies are included in the displayed or exported report.
What the report can show
  • Failed requests and redirect responses.
  • Transfer bytes and summed request duration as HAR-recorded evidence, not a page-load score.
  • First-party versus third-party hosts based on the first valid request host.
  • Cache hit, miss, and revalidation evidence from recorded response status and headers.
  • Tag-manager, analytics, advertising, and consent loader/request patterns.
Privacy and interpretation boundaries
HAR files are sensitive source material. Analysis is local, but the original file remains your responsibility. The sanitized export contains redacted URLs and header names only—not header values, bodies, post data, or cookies. Timings can overlap, browser HAR exporters differ, and a network request does not prove a vendor processed it.
Frequently asked questions
Is my HAR uploaded?
No. The selected file is parsed and analyzed by JavaScript in this browser tab. The analyzer does not send or persist the raw HAR or its contents.
Can HAR files contain secrets?
Yes. HAR files can contain cookies, authorization headers, query values, and request bodies. This tool omits bodies, cookies, sensitive headers, and all query values from its results and exports, but you should still protect the original file.
What are the analysis limits?
Files are capped at 50 MiB and analysis at 5,000 entries. If more entries exist, the report clearly states how many were not checked.
Does tag evidence prove tracking fired?
No. A matched request or loader is evidence only. It does not prove data was accepted, attributed, or sent with valid consent.
 
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Feature requests for Har Analyzer
 

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Tentang alat
Permintaan waterfall Chronological permintaan timing dari HAR. Phase widths come dari dicatat timing fields; overlapping baris adalah diharapkan. Permintaan oleh sumber daya jenis Third-party domain Unduh sanitized JSON Unduh sanitized permintaan CSV Tag dan consent vendor bukti Permintaan needing tinjau # Status Jenis Host / URL Transfer Duration Cache
Apa adalah analysis batasan?
Adalah my HAR diunggah?
Fitur
  • Tidak. dipilih berkas adalah parsed dan analyzed oleh JavaScript di browser tab. analyzer tidak kirim atau persist mentah HAR atau contents-nya.
  • Melakukan tag bukti buktikan pelacakan fired?
  • Berkas adalah capped di 50 MiB dan analysis di 5,000 entri. Jika lebih banyak entri exist, laporan dengan jelas keadaan bagaimana banyak tidak diperiksa.
  • Bagaimana untuk gunakan ini Ekspor HAR dengan konten dari Anda browser’s Jaringan panel. Pilih berkas dan analyze ini secara lokal. Tinjau gagal permintaan, pengalihan, third parties, sumber daya weight, cache bukti, dan detected tag permintaan. Unduh sanitized JSON laporan ketika Anda perlu untuk share bukti. Tidak pernah share original HAR tanpa meninjau ini secara terpisah.
  • Ya. HAR berkas dapat contain cookies, authorization header, kueri nilai, dan permintaan bodies. alat menghilangkan bodies, cookies, sensitive header, dan semua kueri nilai dari hasil-nya dan ekspor, tetapi Anda seharusnya masih protect original berkas.
Cara kerja
Tidak. cocok permintaan atau loader adalah bukti hanya. Ini tidak membuktikan data adalah accepted, attributed, atau dikirim dengan valid consent. Gratis, tanpa pendaftaran. Drop di browser jaringan tangkap untuk periksa kegagalan, pengalihan, transfer weight, timings, caching, third parties, dan tag bukti. mentah HAR tidak pernah menyisakan ini tab. HAR Analyzer
Batasan
  • Dapat HAR berkas contain secrets?
  • Pilih HAR 1.2 berkas Analyze HAR Lokal cap: 50 MiB dan 5,000 entri. Permintaan/response bodies, cookies, sensitive header nilai, dan kueri nilai tidak pernah disertakan di laporan.
  • Analyze HAR berkas secara lokal untuk kegagalan, pengalihan, transfer weight, timings, cache bukti, third parties, dan tag permintaan tanpa uploading tangkap.
  • Home › Alat › HAR Analyzer
Pertanyaan umum
Ya. HAR berkas dapat contain cookies, authorization header, kueri nilai, dan permintaan bodies. alat menghilangkan bodies, cookies, sensitive header, dan semua kueri nilai dari hasil-nya dan ekspor, tetapi Anda seharusnya masih protect original berkas.
Dapat HAR berkas contain secrets?
Pilih HAR 1.2 berkas Analyze HAR Lokal cap: 50 MiB dan 5,000 entri. Permintaan/response bodies, cookies, sensitive header nilai, dan kueri nilai tidak pernah disertakan di laporan.
Analyze HAR berkas secara lokal untuk kegagalan, pengalihan, transfer weight, timings, cache bukti, third parties, dan tag permintaan tanpa uploading tangkap.
Home › Alat › HAR Analyzer
Tidak. cocok permintaan atau loader adalah bukti hanya. Ini tidak membuktikan data adalah accepted, attributed, atau dikirim dengan valid consent.
Gratis, tanpa pendaftaran. Drop di browser jaringan tangkap untuk periksa kegagalan, pengalihan, transfer weight, timings, caching, third parties, dan tag bukti. mentah HAR tidak pernah menyisakan ini tab.
HAR Analyzer