SDP Transform

sdp-transform is a robust JavaScript library designed for parsing and writing Session Description Protocol (SDP) strings, following the grammar defined by RFC4566, RFC5245, and other relevant standards. The current stable version is 3.0.0, published in late 2025. It differentiates itself by rigorously adhering to RFC specifications, automatically coercing numerical values to integers during parsing while keeping other values as strings. The library is built to be easily extendable for custom grammar, making it suitable for a wide range of WebRTC and multimedia signaling applications. It provides core functionalities to convert SDP strings into a structured JavaScript object and vice-versa, facilitating manipulation and generation of SDP messages. While there isn't an explicit release cadence, the project shows active maintenance with regular updates prior to the v3 release.