Paste the contents of /config/bigip.license, the full file or any fragment, and get a plain-language reading of what the license actually says. The parser runs entirely in your browser: nothing is uploaded, and key or signature values are never displayed, only their presence and length.
What it reads
The explainer decodes the whole observable structure of the file. It identifies the management flavor: a BIG-IQ Product License File header together with license_manager_key or pool_license_information fields marks a license managed by BIG-IQ License Manager, while a BIG-IP System License Key File header marks one licensed directly on the system. It reads the identity block (Auth vers, Usage, Vendor), the licensing dates (Licensed date and Service check date, both in the file's compact yyyymmdd form), the Registration Key (checked against the published 5-5-5-5-7 shape from F5 K7752 and K3782), the Licensed version, and the Platform ID with a conservative decode (Z100-family means BIG-IP Virtual Edition, per F5 K02011230; unmapped IDs point you to F5 K9476).
Modules are read from their real grammar: each active module line is pipe-separated into the module name, that module's own 7-7 key, and its feature list, and a file can carry several such lines with distinct keys. optional module lines list features that are licensable but dormant until licensed. Repeatable Exclusive_version lines (the permitted software range, per F5 K42091606), Deny_version lines, and Exclusive_Platform lines are collected into constraint lists, and every remaining feature or limit token (perf_VE_throughput_Mbps, mod_ltm, asm_apps, and the rest) is shown with its value normalized: the file uses both enabled and enable, and both UNLIMITED and unlimited.
The K7727 verdict
The Service check date is judged against F5's License Check Date table (K7727) using the same vendored table the F5 service check date tool uses, so both tools always agree: you see the newest version this license can boot and the nearest branch that would require a reactivation first.
Using it
Paste and read; the Example button loads a masked, structure-faithful sample. Treat the file as sensitive: it carries your registration key, per-module keys, and the Dossier and Authorization signatures. This tool never displays those values, and because field meanings are vendor documentation rather than a fixed standard, confirm licensing decisions against F5's own documentation or support.