✳ CODEC COMPATIBILITY
Instagram Reels AV1 in WebM
AV1 in WebM is not in instagram-reels's documented upload list. Convert before uploading.
Quality impact not documented · WebM is not in the Instagram documented upload list.
AV1 inside WebM is the second standard AV1 upload pair. Instagram composer does not list WebM.
Choose a compatible conversion →WebM project (verified 2026-09-18) · Instagram Content Publishing (verified 2026-09-18)
Frequently asked
Does Instagram Reels support AV1 in WebM?
AV1 in WebM is not in instagram-reels's documented upload list. Convert before uploading. Koldflux's compatibility engine reaches this verdict from sourced platform documentation.
Should I convert AV1 in WebM for Instagram Reels?
AV1 inside WEBM is not the recommended upload for instagram-reels; H264 inside MP4 is.
Will Instagram Reels re-encode my file?
WebM is not in the Instagram documented upload list.