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⟨ QUANTUM ERROR PORTAL ⟩

Navigate the Error Dimensions

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JA4 Fingerprint Directory

What this edge classifies traffic against, plus what it actually sees — decoded and named, not just listed

6833 fingerprints
179 curated
6654 seen live
4011 browsers
202 API clients
915 scanners

Showing all 6833 fingerprints. Page 58 of 69. JSON

Fingerprint Type Tier Class Identified as
t12d161000_bac3852d4616_71776a6e6e2b JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d170600_5b57614c22b0_047df114b631 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d1710h2_5d45335196f8_5302501154e5 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d1711h1_5b57614c22b0_d51f866a7e11 JA4 seen live3× Unclassified Presented a User-Agent we cannot attribute to a known client.
t12d180800_4b22cbed5bed_62f610611f10 JA4 seen live16× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d1809h1_5d04281c6031_08de9d6ffbb8 JA4 seen live1× Unclassified Presented a User-Agent we cannot attribute to a known client.
t12d1809h2_4da576aed5c1_6dadff81672f JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d1809h2_ca1ff0992a9f_a9efee95875b JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d1810h2_b1064e464c5c_e173790c61ff JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d190600_826a7383a64d_66cfc59077e0 JA4 seen live36× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d190700_724f0b7e6496_dead13803058 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d190700_d83cc789557e_8e03bb9b6084 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d190800_d83cc789557e_62f610611f10 JA4 seen live168× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d1909h2_04cf00e2c016_1ca79865cae6 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d1910h2_d83cc789557e_396e29a8f06b JA4 seen live2× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d1910h2_e23e2c49fe80_9cf6fd8da9d8 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d200600_19d7ba6ed342_617aa96a424f JA4 seen live5× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d200700_c903b3b6e441_6a6462463895 JA4 seen live2× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d2007h2_a8b3e4156f07_2eb009e832fe JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d210400_89c2427e67e4_b648b7f3bc8e JA4 seen live18× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d210800_76e208dd3e22_465a47a21f65 JA4 seen live12× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d220800_560f53e7a786_b80abeb657b1 JA4 seen live12× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d220800_fe100e50004f_b80abeb657b1 JA4 seen live11× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d2210h2_560f53e7a786_befba1ae359c JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d230800_31bea9ec6298_b80abeb657b1 JA4 seen live43× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d2310h2_f91c41aead95_5466d6a1e075 JA4 seen live3× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d240600_9295eb73ea51_7a3643a9f024 JA4 seen live9× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d260400_c69ecbaecc6c_16266c2fce5b JA4 seen live20× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d270800_a2460661a67a_5d316f34096e JA4 seen live7471× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d280700_b75078996b15_b85b7b870361 JA4 seen live3× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d280700_bbd4f008d9b2_122ea0d3d2f7 JA4 seen live68× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d280700_d943125447b4_b1069b7c31f3 JA4 seen live18× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d280800_d943125447b4_699838c0e161 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d281000_0df5e5c63df4_dc2a3e31388b JA4 seen live19× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d290700_fc2078a0b8c0_98c48c6649d0 JA4 seen live26× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d300600_a9ca94f90404_935ee41de825 JA4 seen live22× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d310600_f3b328a90fc1_25552ceac63b JA4 seen live7× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d310800_1d947a95fc68_834abc1a9a7d JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d320400_992cb694dc73_bacfa8fa5626 JA4 seen live57× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d320800_b415a99ff5d8_3ebdebe9c84d JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d330600_5172cef6ed69_334f0aaed909 JA4 seen live147× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d340200_280581216cf5_e4b0759bffdd JA4 seen live57× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d340600_498eeac4deb3_25552ceac63b JA4 seen live7× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d370400_3fce34ec6c8f_5d941312bb9a JA4 seen live24× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d380500_10ed599f3404_654fe63324b3 JA4 seen live79× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d3805ht_10ed599f3404_4f2194e778ad JA4 seen live25× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d3806ht_10ed599f3404_ac7f9eb85633 JA4 seen live7× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d400600_44c89e5422f1_a6ad5fe9ef24 JA4 seen live79× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d430500_1ce71f0edbb1_0b643df80691 JA4 seen live2× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d430700_1ce71f0edbb1_85fd39bfcaa8 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d460500_0b5b145d87b5_7447efa29e2f JA4 seen live5× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d490600_730fb1b0ac6a_25552ceac63b JA4 seen live218× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d4906ht_730fb1b0ac6a_d27d9be533b8 JA4 seen live56× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d490700_ed211f7843e6_b84f7053a7d6 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d4907ht_730fb1b0ac6a_20308a74e42f JA4 seen live61× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d520500_26e41e4f9c7e_d44182472191 JA4 seen live13× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d520600_7554301188de_a6ad5fe9ef24 JA4 seen live7× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d520700_3874cc0afe49_d4749a06ddf8 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d520800_9e42dd384d95_3ebdebe9c84d JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d560700_8aab05645947_b84f7053a7d6 JA4 seen live30× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d560700_99d8c53049f3_577401a16f57 JA4 seen live2× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d590600_7bd0586cbef7_6956cdc5de3d JA4 seen live2× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d5908h1_7bd0586cbef7_cf46fd089bfb JA4 seen live13× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d610700_8a10cb45a794_b84f7053a7d6 JA4 seen live253× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d620500_f293919562b9_654fe63324b3 JA4 seen live12× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d620700_106a9de34958_89e5d97212f3 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d640400_1715b94e3896_326c0be892b4 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d640400_1e98fdfb27e9_326c0be892b4 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d640400_a3acda31d846_326c0be892b4 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d640400_e31a90cd0803_326c0be892b4 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d640400_e7b476f9520b_326c0be892b4 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d640400_f559eb9565fd_326c0be892b4 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d640800_60fcec5a41cb_3ebdebe9c84d JA4 seen live5× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d650600_77b304177063_25552ceac63b JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d650600_77b304177063_6956cdc5de3d JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d650700_0dd215169a35_b84f7053a7d6 JA4 seen live38× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d670600_3d07528e3801_25552ceac63b JA4 seen live18× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d6912hq_ea0618708e31_39577bfd1595 JA4 seen live2585× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d6912ht_ea0618708e31_39577bfd1595 JA4 seen live2607× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d720800_1b75dbf8ecb1_bccd9a762ad0 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d8007h2_9cedc1f1428b_20308a74e42f JA4 seen live29× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d830800_f2e3c83f4807_02830a49146e JA4 seen live194× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d860600_e18388e7f3a3_25552ceac63b JA4 seen live279× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d860700_e18388e7f3a3_b84f7053a7d6 JA4 seen live3× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d880500_9d74d59be4ce_7562623a49ec JA4 seen live29× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d990500_039a0bf59e5c_7562623a49ec JA4 seen live29× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d990500_41a9ebd02c1f_7562623a49ec JA4 seen live233× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d990500_87ce778b49c2_8ce18dd517a1 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d990500_e91dfaae0f87_7562623a49ec JA4 seen live29× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d990500_ecf6b0aa1042_7562623a49ec JA4 seen live29× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d990700_9839e1f8b32d_91c50624ef9b JA4 seen live10× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d990700_a40d17a72bcb_b84f7053a7d6 JA4 seen live8× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d990700_ffeaddab04ac_b84f7053a7d6 JA4 seen live4× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12d990801_9839e1f8b32d_8bd0e887432c JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i0808h2_c9d1e06f98c4_ac6a06c2a0bd JA4 seen live104× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i0808ht_c9d1e06f98c4_ac6a06c2a0bd JA4 seen live105× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i0809h2_c9d1e06f98c4_199b71c7db97 JA4 seen live105× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1503h2_8daaf6152771_7ca2e5979b2a JA4 seen live3× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1503h2_8daaf6152771_a439cba1f1e7 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1503h2_8daaf6152771_c97aa4dd9f5a JA4 seen live2× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.

JA3 and JA4, and why the difference matters here

A TLS fingerprint identifies a client by how it is built, not by anything it claims. The cipher suites it offers, the extensions it sends, the order they appear in — all of that is decided by the TLS library and its configuration, and none of it is affected by changing a User-Agent string.

JA3 hashes the whole ClientHello into one MD5. It works, but it throws away every bit of structure: two fingerprints that differ by one cipher look no more related than two from unrelated software.

JA4 keeps the structure. The first component is plain text you can read without a lookup table — transport, TLS version, whether a server name was sent, how many ciphers and extensions, which ALPN. The second and third hash the ciphers and the extensions separately. That separation is what lets this directory group a scanner's twelve fingerprints into one family, because they share an extension hash while their cipher hashes differ.

How this database is used

It is not a reference list. The proxy loads it at startup and consults it on every TLS handshake, matching JA4 first and falling back to JA3, and the classification it returns feeds blocking, rate limiting and per-route allowlists. Two further checks run alongside it:

Replay detection flags one fingerprint appearing from many addresses inside a window — a single client build spread across a botnet. Drift detection flags a fingerprint whose cipher or extension composition changes while its hash stays put, which is the signature of something trying to wear another client's identity.

Directory generated 2026-10-07T17:20:03+00:00. Want to know your own? The Handshake Mirror reports it, along with the rest of your connection.