Convert your .webm files to .mp4 format online for free. No software to install. Fast, secure, and easy.
Pro account required for audio & video
Drag and drop your .webm file or click to browse.
Select MP4 as your output format.
Click Convert and download your .mp4 file.
Converting WebM to MP4 maximizes playback compatibility across all devices and platforms. WebM (Web Media) and MP4 (MPEG-4 Part 14) use different container structures with different strengths.
WebM (Web Media, introduced in 2010) uses proprietary compression. MP4 (MPEG-4 Part 14, introduced in 2001) uses proprietary compression. WebM browser support: All modern browsers (Chrome, Firefox, Edge; Safari with AV1 only). MP4 browser support: Universal.
The quality impact depends on the specific settings used during conversion. MP4 uses compression that may affect quality depending on the chosen settings.
Typical WebM file size: A 1-minute 1080p VP9 video: ~10-20 MB. Typical MP4 file size: A 1-minute 1080p H.264 video: ~15-30 MB; 4K: ~50-100 MB.
For maximum compatibility, use H.264 Main Profile with AAC audio. For smaller files on modern devices, H.265 offers roughly 50% better compression. Use two-pass encoding for the best quality at a given file size target.
Convert WebM to MP4 with 3 free conversions per day. No hidden fees.
Create a free account in 10 seconds and start converting immediately. No credit card required.
Files are encrypted during transfer, processed on secure servers, and deleted immediately after conversion.
Convert files from any device — desktop, tablet, or phone. No software to install, works in any modern browser.
SquishConvert supports over 358 file conversion combinations across images, documents, audio, and video.
Your converted .mp4 file maintains the best possible quality. No unnecessary compression or quality loss.
Video conversion requires a Pro account. See pricing — starting at $4.99/month
You get 3 free conversions per day. Video conversions require a Pro account.
Most files convert in under 10 seconds. Larger files may take a bit longer depending on size.
Yes. Files are encrypted during transfer, processed on secure servers, and deleted immediately after conversion. We never store your files.
Currently, SquishConvert converts one file at a time. Batch conversion is coming soon — stay tuned!
Free users can convert files up to 10 MB. Pro users can convert files up to 500 MB.