- Settings
- Processing
- Result
Convert MP4 to WebM Online — Free MP4 to WebM Converter
Convert MP4 to WebM for web embedding. Smaller file sizes optimized for HTML5 video players.
Your file is kept — processing resumes automatically.
This limit resets tomorrow. Go Pro to never hit it again, on every tool.
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We'll take it from here
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MP4, MOV, AVI, MKV, WebM
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Conversion Complete!
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Translation Complete!
Preview below. Download your file whenever you like. Timecodes are preserved.
Platform
Duration
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Your Video Script
Quota is based on full video duration. Queued and running tasks are included; the exact balance is checked before transfer.
COMPATIBLE PLATFORMS
The language is detected automatically — nothing to select. Over 100 languages are recognised (Wolof is not supported yet).
Helps the AI spell rare names or brands correctly.
Identify speakers
Detects who speaks when (ideal for interviews and podcasts)
Number of speakers
About 1–3 minutes. Face tracking keeps the subject in frame.
Keep this tab open, processing continues.
Klipa is preparing your preview
Your best clip is being cut and auto-reframed (face tracking). This preparation happens only once — about 30 seconds.
Upgrade to generate your clips with this style, or continue free with the Minimal style.
Burning in the captions…
Klipa is burning your captions into this clip, in the style you chose — identical to the preview. This takes a moment, keep the page open.
The burn failed — nothing was lost, you can retry.
File expired
For your privacy, files are deleted automatically after a while. Re-run the compression to get a new link.
Before
After
Quality preserved: your video stays sharp and plays everywhere, with no watermark.
Compress heavier files, as many times as you want
What's next?
What's next?
Your reframed video is ready
Free download stays available — your video will carry the logo.
Unlock often? See ProWhat's next?
The free version carries the Klipa logo in the center and bottom of the video.
One-time payment, this video only.
Or Pro: all your videos logo-free, unlimited →What's next?
Longer videos and larger files with Pro.
Your original video is still available. Try another tool:
Convert MP4 to WebM for Web-Optimized Video
WebM is the web's native video format — royalty-free, lightweight, and designed specifically for HTML5 video players. Converting your MP4 to WebM with VP9 encoding delivers smaller file sizes at comparable quality, which means faster page loads and lower bandwidth costs for your website.
Not sure which format to use? Our video converter supports every major format. After creating your WebM, consider adding AI-generated subtitles in VTT format for accessible web video playback.
How to Convert MP4 to WebM
Upload Your MP4 File
Drag and drop your MP4 file — up to 500 MB without an account, 1 GB with a free account, 5 GB on Pro (20 GB on Studio). We accept all MP4 variants including H.264, H.265, and MPEG-4 encoded files.
VP9 Encoding for the Web
Our server encodes your video using the VP9 codec inside a WebM container. VP9 delivers excellent quality at lower bitrates than H.264, making it ideal for web embedding. The process takes 1-3 minutes depending on file length.
Download Your WebM File
Embed the WebM directly in your website using the HTML5 video tag. For maximum browser compatibility, keep your MP4 as a fallback. Need subtitles on your web video? Generate VTT captions with our AI tool.
Why Convert MP4 to WebM?
Web Optimized
WebM is designed for the web. Smaller files that stream faster in HTML5 players.
Open Format
WebM is royalty-free. No licensing costs for web deployment.
VP9 Encoding
Modern VP9 codec delivers excellent quality at lower bitrates.
HTML5 Ready
Drop the WebM file directly into your website's video player.
OPTIMIZED FOR THE WEB
Website Background Videos
Background videos on landing pages must load fast. WebM files are significantly smaller than MP4 at the same quality, reducing page load times. Use our compressor on the source MP4 first, then convert to WebM for the smallest possible file.
E-Learning Platforms
Online courses stream hundreds of hours of video. WebM's efficient VP9 encoding reduces bandwidth costs while maintaining clarity for educational content. Add AI subtitles in VTT format for accessible learning.
Open-Source and Royalty-Free Projects
WebM is completely royalty-free, making it the ideal choice for open-source projects, public domain content, and platforms that want to avoid codec licensing fees. Use alongside our converter for any other format needs.
Related Tools
MP4 to WebM — FAQ
What Creators Say
WebM: Lighter, Faster, Royalty-Free
Give your website the performance boost it deserves. Klipa's MP4 to WebM converter delivers VP9-encoded video files that stream faster and cost less bandwidth — all royalty-free. Combine it with our compressor, AI subtitles, and subtitle converter for a complete web video toolkit.
