"Can I use" provides up-to-date browser support tables for support of front-end web technologies on desktop and mobile web browsers.

webcodecs property shows High browser compatibility on Safari browsers. High browser compatibility means the webcodecs property is Fully Supported by a majority of Safari browser versions.

January 13, 2023 - Too bad the release cycle for Safari is shit, it'll be at least 2 years before end users see support. Reply · reply · Some_Assistance_323 · • · Added experimental WebCodecs AV1 support · Does that mean we can play av1 files in browser? Reply · reply ·

WebCodecs API on Safari is fully supported on 26.1-26.2, partially supported on 16.6-26, and not supported on 3.2-16 Safari versions.

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November 8, 2022 - Added support for WebCodecs Validate VideoFrameInit algorithm (255786@main)

The WebCodecs API allows web applications to encode and decode audio and video.

1 month ago - As of May 2025, all major browsers ... is supported in Safari Technology Preview, meaning that soon, all major browsers will support WebCodecs fully....

May 7, 2023 - Curious if you ever solved this. I'm running into the same -- perhaps Safari does not yet support HEVC with WebCodecs?

March 28, 2023 - Interesting that they still don't support Media Source Extensions on iOS but are adding WebCodecs support. I keep hoping Safari will add MSE, as I'd like to support both live and historical content with one API on all browsers. WebRTC doesn't seem suitable for historical.

November 3, 2025 - The WebCodecs API provides access to codecs that are already in the browser.

June 16, 2025 - Safari 26 beta expands support for WebCodecs API by adding AudioEncoder and AudioDecoder. WebCodecs gives developers low-level access to the individual frames of a video stream and chunks of audio.

June 30, 2025 - Chrome 138 also adds rotation: int and flip: bool values to various video related interfaces in WebCodecs so that developers can work with frame sources that have orientation. Beta browser versions give you a preview of things that will be in the next stable version of the browser. It's a great time to test new features, or removals, that could impact your site before the world gets that release. New betas are Firefox 141, Safari 26, and Chrome 139.

Preview the latest web technology updates including: Web Inspector, CSS, Rendering, JavaScript, WebCodecs, Web API, Media, Web Animations, HTML, Accessibility, Security, Privacy, and Safari Web Extensions.

January 14, 2026 - Primary Use Case: Determining real-world WebCodecs API codec support across browsers and platforms. Key Findings: Best universal support: H.264/AVC variants (99%+ support across all platforms) Limited support: AV1 on Safari/iOS (varies by device and OS version) Platform gaps: HEVC support varies significantly (strong on Apple, limited elsewhere) Recommended fallback chain: AV1 → VP9 → H.264 (for video encoding) Common Questions Answered: Q: “Does Safari support AV1?” → A: Limited; see Safari browser-specific data ·

February 17, 2023 - Nope. Goto Safari settings then Experimental WebKit Features and you’ll see this.

June 23, 2023 - まだまだ、Audio無し ▪ Safariで使うなら、H.264が無難 • MediaStreamTrack Insertable Media Processing using Streams ◦ 仕様がまた整理されていない、使うに まだ早い ▪ Chromeで 実験 、もう始められる 個人 見解 • WebCodecsが普及する まだまだ先（5年以上） • し らく WebRTCで行く が吉

2 weeks ago - Fixed an issue where video playback using the WebGPU renderer in WebCodecs could display a black screen. (158442539) Fixed an issue where WebGPU video textures failed to load in Three.js panoramas. (159918934) Fixed getUserMedia() on iOS incorrectly firing devicechange events when there was no actual change to available microphones or default devices. (157693528) Original source Report a problem ... Safari 26.0 arrives with broad accessibility fixes, new CSS and rendering features, expanded Web APIs, and improved performance across iOS, macOS, visionOS, and more.