WebM compression
WebM compressor — compress WebM online free
Screen recorders and browsers often export WebM. Compress WebM to a smaller, shareable MP4 without installing software.
Looking for a WebM compressor? BotMart lets you compress WebM in the browser: upload your recording, process in the cloud, and download a lighter MP4 for YouTube, Discord, email, or WhatsApp.
Why compress WebM?
- Screen recordings get huge — Browser and desktop capture tools often save WebM at high bitrates.
- MP4 is easier to share — Many apps and phones prefer H.264 MP4 over raw WebM.
- Faster uploads — A smaller file finishes sooner on home Wi‑Fi or mobile data.
How to compress WebM online (step by step)
- Sign in with a free account.
- Open the video compressor and upload your .webm file.
- Pick a preset (YouTube, social, or general compression).
- Download the smaller MP4 when the job finishes.
FAQ
What is a WebM compressor?
A WebM compressor shrinks or re-encodes .webm video so the file is smaller or more compatible. BotMart outputs MP4 (H.264 + AAC) for broad device support.
Can I compress WebM without losing all quality?
Compression is lossy—you trade some detail for size. Presets aim for a practical balance for sharing. Keep your original WebM if you need an archive copy.
Do I only need WebM to MP4, not a smaller file?
Use convert to MP4 or the MP4 converter when format compatibility matters more than file size.
How long are files stored?
Uploads and outputs are removed automatically within 24 hours.