3GPP Tools
Browser-based utilities for 5G NR engineers. Everything runs locally in your browser — nothing you paste is uploaded.
NR Explorer
Numerology, NR-ARFCN/GSCN, SSB bursts, CORESET#0 / searchSpaceZero, TDD patterns and BWP RIVs, visualised.
Open →DCI Decoder
Decode or build DCI 0_0 / 0_1 / 1_0 / 1_1 for your RRC config — size alignment, RB/symbol allocation and TBS. Paste an RRCSetup to configure.
Open →MAC PDU Decoder
Split DL-SCH / UL-SCH / RAR PDUs into subPDUs and decode MAC CEs — BSR, PHR, TA command, C-RNTI, CRI, SCell and TCI activation — per TS 38.321.
Open →ASN.1 Decoder
NR / LTE RRC (Rel-18), NGAP, F1AP, E1AP, XnAP, S1AP, X2AP, LPP, NRPPa and 5GS / EPS NAS — nested containers decoded, plus an edit-and-encode mode.
Open →NR Trivia
Over 100 questions on NR — numerology to NAS — with an explanation and spec clause for every answer, plus a daily five.
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