Does Pinterest support WebM files?
No - WebM isn't in Pinterest's accepted list on either the app or the web.
Pinterest's Pin specification names MP4, MOV and M4V as the accepted video formats depending on surface. WebM isn't among them on the app or on pinterest.com - convert to MP4 first.
Convert WebM to MP4 →Source: Pinterest: Review Pin specs. Organic Pins; app and web formats differ from ad specifications. Checked 2026-09-12.
Frequently asked
Does Pinterest support WebM?
No - WebM isn't in Pinterest's accepted list on either the app or the web. Pinterest's Pin specification names MP4, MOV and M4V as the accepted video formats depending on surface. WebM isn't among them on the app or on pinterest.com - convert to MP4 first.
What format should I convert WebM to for Pinterest?
MP4 - a widely supported video container; acceptance also depends on the video and audio codecs inside it. Converting WebM to MP4 runs entirely in your browser with the converter linked below.
Koldflux exports every clip in the format each platform actually wants - no compatibility guesswork, no manual conversion step.
Automate this in Koldflux