Hi All,
Does anyone has 3gpp decoder?
Thanks
3gpp decoder for what?
There are so many of them: RRC, RLC, MAC, NAS, etc.
Also please mention technology.
This one is pretty general:
I tried this but couldn’t install. 
Any alternate web link there?
For 2G and LTE.
What ASN.1 indicates here?
Type of protocol.
Ok, thanks looking for full form of ASN. 
Thanks. I will try (explore it).
I need to convert UE capability from HEX format to TXT format?
(HEX format from HO request)
There are other LTE decoders online. Just “google” for it. 
Hi. Has anyone tried to install it on MacOS?
Quick 2026 update for anyone landing on this thread from Google.
I built an online 3GPP Layer 3 decoder specifically for RRC and NAS:
It covers GSM, UMTS, LTE and 5G NR, with supported structures through Release 18. You can paste a single hex PDU, select the RAT, protocol and logical channel, then inspect the result in a structured tree or raw view. It also expands supported LTE-to-NR nr-SecondaryCellGroupConfig containers.
The free plan includes 20 RRC decodes per day with no signup. NAS, batch decoding and JSON export are available in Pro. Hex frames are processed in memory and are not stored.
The production engine was checked against a bounded corpus of 63,375 cases: 36,904 expected decodes and 26,471 expected safe rejections. This is not a replacement for full-trace correlation in Wireshark, but it is useful when you have one isolated RRC or NAS frame and need a quick readable result.
I would be happy to test difficult real-world frames from QXDM/QCAT, TEMS, Nemo or PCAP exports and improve the supported coverage based on field feedback.
Documentation update: I added a public GitHub repository with a quick start, a byte-level 5GMM example, official 3GPP references, the compatibility scope, and privacy and validation boundaries:
It contains documentation and examples only. The decoding engine remains proprietary.