Play HEVC, AV1 and MKV in the browser with WebCodecs (no server transcoding)

📰 Dev.to · Ujjawal Kashyap

Play HEVC, AV1, and MKV videos in browsers without server transcoding using WebCodecs and WebAssembly

intermediate Published 27 Apr 2026
Action Steps
  1. Use WebCodecs to decode video streams in the browser
  2. Implement a WebAssembly demuxer to handle video container formats like MKV
  3. Replace traditional <video> tags with a custom solution that utilizes WebCodecs for playback
  4. Test video playback in various modern browsers to ensure compatibility
  5. Configure the WebAssembly demuxer to support different video codecs like HEVC and AV1
Who Needs to Know This

Developers and engineers working on web-based video applications can benefit from this technology to enhance user experience without relying on server-side transcoding. This can be particularly useful for teams building video streaming services or web applications with video content.

Key Insight

💡 WebCodecs and WebAssembly can be used together to enable playback of various video formats in browsers without the need for server-side transcoding

Share This
📹 Play HEVC, AV1, & MKV in browsers without server transcoding! 🚀

Key Takeaways

Play HEVC, AV1, and MKV videos in browsers without server transcoding using WebCodecs and WebAssembly

Full Article

A drop-in <video> replacement that plays HEVC, AV1, MKV, and 4K HDR in any modern browser using WebCodecs and a WebAssembly demuxer — no server-side FFmpeg or transcoding required.
Read full article → ← Back to Reads

Related Videos

Is Your Website Searchable on Google & Bing? (The Easiest Way to Check)
Is Your Website Searchable on Google & Bing? (The Easiest Way to Check)
Mariah Magazine
Long-Term SEO Results (Over a YEAR Later!) | Behind the Scenes of REAL SEO Results for Business
Long-Term SEO Results (Over a YEAR Later!) | Behind the Scenes of REAL SEO Results for Business
Mariah Magazine
Your Data is Telling a Story: How to Use it for Better Results
Your Data is Telling a Story: How to Use it for Better Results
Mariah Magazine
On-Page SEO Content Optimization: Best Practices Breakdown & a Tool for Making it Easier
On-Page SEO Content Optimization: Best Practices Breakdown & a Tool for Making it Easier
Mariah Magazine
Add Color Outline Borders to Images in Canva: Step by Step Tutorial for Beginners
Add Color Outline Borders to Images in Canva: Step by Step Tutorial for Beginners
Mariah Magazine
Google Video Recorder: How to Use Google Vids to Record Your Screen & Face at the Same Time
Google Video Recorder: How to Use Google Vids to Record Your Screen & Face at the Same Time
Mariah Magazine