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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

6832 fingerprints
179 curated
6653 seen live
4010 browsers
202 API clients
915 scanners

Showing all 6832 fingerprints. Page 59 of 69. JSON

Fingerprint Type Tier Class Identified as
t12i1504h2_8daaf6152771_4ac01172dfcf JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1504h2_8daaf6152771_66e0d15328ae JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1504h2_8daaf6152771_6973c90d71ea JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1504h2_8daaf6152771_853aec97cc49 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1504h2_8daaf6152771_85cf7a6ef633 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1504h2_8daaf6152771_c245bb1ab1fe JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1504h2_8daaf6152771_d5ca406f6f55 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1504h2_8daaf6152771_dc67962036b3 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1504h2_8daaf6152771_e8048a751f68 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_05cfb8aa73db JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_0f2ec705819d JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_26378f68b707 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_2a184be5a224 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_2d364ae6fb80 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_317cb200ce28 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_459efd5d1d9e JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_48fdfab7270c JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_53c5b1838b96 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_697ffc8436c8 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_79a046205eef JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_79d0dc772631 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_7c90efbf5543 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_a3e81914eb93 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_aaa1bb268050 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_afda78a8b431 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_aff3deea7f12 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_bf91c976a911 JA4 seen live1× Unclassified Presented a User-Agent we cannot attribute to a known client.
t12i1505h2_8daaf6152771_c2097553ab4a JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_d2e3de365767 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_d672f3539fb4 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_e452696aae62 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_e73a38c48156 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1505h2_8daaf6152771_efdcf0f9a773 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h1_8daaf6152771_8e3b5f026003 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_01543ff06477 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_057b4e4d2b3d JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_0965147a6f52 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_317b1abd98bf JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_41da1b532f1d JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_43f8afbbfab7 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_4df255c676f9 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_5424759ae979 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_5b06854c7af9 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_6336c6cb1417 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_7387b6029475 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_745ca75e536c JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_74759dd3ab6e JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_7acd2815969f JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_7b8aa45a1046 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_810c6ce444a8 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_86cadf1492a6 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_8e5c9cc2af63 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_b0d3698e5096 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_b649636998cb JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_c1ec3f343e73 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_ce23fb417aac JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_d4db3e0c010c JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_e793300d7d47 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_ea204d78966a JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1506h2_8daaf6152771_ec24e4ee1cf2 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h1_8daaf6152771_05766404738f JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_0eb7788d75df JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_10ed277f9ef1 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_1566c837be95 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_1facd8e38c97 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_1fcf7b400206 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_2de458f6e166 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_31d6346cb81e JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_3dc138390035 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_49f193ed448b JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_4a2ceb0da223 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_59b96b53af19 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_6463f7700619 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_7494fdb763c3 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_75145a50a9bd JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_7e9f881eb132 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_9f989d55f075 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_a555bcbf2bc9 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_ae689d3866d6 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_afbcb77db765 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_b0b3c68bfe92 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_b1a4f2c78826 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_bff5e00562ca JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_c6b7a2ed985f JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_de3a2e9504f9 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_e0b201ca86c8 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_f043f2ccc561 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1507h2_8daaf6152771_fce8a138ad83 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1508h1_8daaf6152771_a2460445d57c JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1508h2_8daaf6152771_08a792c65da1 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1508h2_8daaf6152771_1b1ce02dbc99 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1508h2_8daaf6152771_3225aaed9dfe JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1508h2_8daaf6152771_3819f89efd29 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1508h2_8daaf6152771_3aad94f89760 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1508h2_8daaf6152771_3bd5cb5172ba JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1508h2_8daaf6152771_41ed70721b56 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1508h2_8daaf6152771_47f19204c909 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1508h2_8daaf6152771_4b53028a2715 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1508h2_8daaf6152771_541eb61b3ab1 JA4 seen live1× Unclassified Completed a TLS handshake but never an HTTP request, so no User-Agent was ever presented.
t12i1508h2_8daaf6152771_54460493fae5 JA4 seen live1× 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 2026-10-07T16:50:03+00:00. Want to know your own? The Handshake Mirror reports it, along with the rest of your connection.