Convert video to WEB

Free online conversion of 3GP, AVI, FLV, GIF, MKV, MOV, MP4, MPG, WMV to WEB

Local-first

Drop files here

or click to select files. Supports MP4, AVI, MPG, MOV, FLV, 3GP, WEBM, MKV, WMV, GIF.

This online video format converter supports a variety of video formats including MP4, AVI, MPG, MOV, FLV, 3GP, MKV, WMV, GIF, etc., making it easy for you to convert to highly compatible WEBM formats. Multi-format compatibility: Supports a wide range of video formats, such as MP4, AVI, MPG, MOV, FLV, 3GP, MKV, WMV, GIF, etc., to meet your processing needs for different video files. WEBM conversion: Convert videos to WEBM format quickly and easily, ensuring optimized browser and device compatibility and improving viewing experience.

Convert any video to WEBM online

WEBM is an open, royalty-free format built for the web, using the efficient VP8/VP9 codecs. This free tool converts MP4, AVI, MOV, MKV, FLV, WMV, 3GP and MPG to WEBM in your browser — perfect for HTML5 video, fast-loading backgrounds and small clips that stream smoothly on any site.

Small files, great for the web

VP9 compresses video efficiently, so a WEBM is often noticeably smaller than the same clip as MP4 at similar quality. That makes WEBM ideal for website hero videos, animations and anywhere page weight and load speed matter, while staying fully open and license-free.

Runs in your browser, files stay private

Conversion uses WebAssembly (ffmpeg.wasm) entirely on your device — nothing is uploaded. No sign-up, no watermark and no file limit, and you can adjust bitrate and resolution to balance WEBM quality against file size.

Frequently asked questions

How do I convert a video to WEBM?

Open the tool, drop in your MP4, AVI, MOV, MKV, FLV, WMV, 3GP or MPG file, keep WEBM as the output and click convert. The WEBM is produced in your browser and downloads immediately.

Why convert to WEBM?

WEBM is open, royalty-free and highly compressed with VP9, which makes it the best choice for HTML5 video on websites — smaller files that load fast and play natively in modern browsers.

Is the video to WEBM converter free?

Yes, completely free with no sign-up, no watermark and no limit on the number or size of files you convert.

What is the difference between WEBM and MP4?

WEBM uses the open VP8/VP9 codecs and is usually smaller, ideal for the web, while MP4 (H.264) has broader device and editor support. For websites WEBM is often the lighter choice.

Are my videos uploaded to a server?

No. All processing runs locally in your browser through WebAssembly, so your videos never leave your device.