Does Pinterest support WebM files?
an open, web-native format that produces smaller files at a similar quality, popular for embedding on websites
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.
Recommended upload: MP4 with H264. WEBM is not the platform's documented upload container; export as MP4 with H264 video for the safest upload.
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.
How do I check whether my WebM file will upload cleanly to Pinterest?
Open the Koldflux File Doctor, drop in the file, and pick Pinterest. It reads the container, codec, resolution, duration and file size locally and reports pass / warn / fail against the documented Pinterest constraints.