Convert SWF to WebM — Free Online Converter

SWF (Shockwave Flash) is Adobe's discontinued multimedia format. WebM is Google's open, royalty-free video format designed for the web, using VP8/VP9 video codecs and Vorbis/Opus audio codecs in a Matroska-based container. Converting SWF to WebM transforms legacy Flash content into the modern open web video standard supported by Chrome, Firefox, Edge, and Opera, as well as Android devices.

WebM was explicitly designed as a web-first video format — lightweight, efficient, and free of patent licensing fees. For Flash content that will be published on the web, embedded in HTML5 pages, or served from CDNs, WebM provides an excellent modern replacement that aligns with the open web principles that ultimately replaced Flash.

WebM is the open-source alternative to MP4 for web video. Chrome, Firefox, Edge, and Opera support WebM natively through the HTML5 video element. For websites and web applications that serve video and prefer open-source codecs, WebM is the standard format. Flash content converted to WebM can be embedded directly in web pages using the same HTML5 video element that replaced Flash Player.

VP9 (WebM's modern video codec) provides compression efficiency competitive with H.264, often achieving smaller file sizes at equivalent quality. For web delivery where bandwidth matters, WebM with VP9 can reduce video serving costs compared to H.264/MP4.