1. Upload your WEBM file
Start by dragging and dropping your WEBM file into the upload area, or click to browse your device and select the file you want to compress.
Online WEBM Compressor
Compress and reduce WEBM file size in seconds — right from your browser. No installs. No watermarks. 100% free.
Rated 4.5 out of 5 on Trustpilot
Why compress WEBM with HappyScribe?
Smaller Files, Same Quality
Our smart compression algorithms reduce your WEBM file size by up to 90% while preserving the quality you need. You control the balance between size and fidelity.
No Signup, No Cost
Compress as many WEBM files as you want — completely free. No account required, no watermarks, no limits on the number of files.
Private & Encrypted
Your files never leave your browser unprotected. All transfers use 256-bit SSL encryption and files are automatically deleted after processing.
Works Everywhere
Nothing to install. Compress WEBM files straight from Chrome, Safari, or Firefox — on desktop, tablet, or phone.
How to compress a WEBM file?
2. Choose your compression settings
Select your preferred compression level. Choose between maximum compression for the smallest file size, or balanced compression to preserve more quality. When you're ready, hit the Compress button.
3. Download your compressed WEBM
Once the compression is complete, you'll get a download link right away. Just click to save the smaller file to your device. It's fast, easy, and doesn't require any software installation.
What is a WEBM file?
WebM is a royalty‑free container designed by Google for the open web. It packages the Matroska profile with VP8/VP9/AV1 video and Vorbis/Opus audio, optimised for low overhead and HTML5 streaming. Announced at Google I/O 2010, WebM combined Matroska’s flexibility with On2’s newly open‑sourced VP8 codec. YouTube began offering WebM downloads the same year. Support grew as browsers added VP9 hardware decoding and will expand again with AV1.
When should you compress WEBM files?
Compressing WEBM files is useful when you need to share them via email, upload them to platforms with file size limits, save storage space, or speed up transfers. Compression reduces the file size while keeping the content usable.
Free Online WEBM Compressor
Need to reduce the size of a WEBM file? You're in the right place. HappyScribe's WEBM compressor lets you shrink your files in just a few clicks — no downloads, no complicated software, and no hidden costs. Upload your WEBM file, choose your compression settings, and hit Compress. That's it.
Why compress WEBM files?
Large WEBM files can be a headache. They eat up storage space, take forever to upload, and often hit file size limits on email and messaging platforms. Compressing your WEBM files solves all of that — you get a smaller file that's easier to share, faster to transfer, and takes up less room on your device or cloud storage.
When to use a WEBM compressor
Our online WEBM compressor is perfect for a range of everyday situations:
Email attachments — Most email providers cap attachments at 25 MB. Compress your WEBM file to fit within the limit without splitting it across multiple emails.
Social media and web uploads — Platforms like WhatsApp, Discord, and Slack have strict file size limits. A compressed WEBM file uploads faster and stays within the cap.
Saving storage space — Running low on disk space or cloud storage? Batch-compress your WEBM library and free up gigabytes without deleting anything.
Faster transfers — Smaller files mean quicker uploads and downloads, especially on slower internet connections or mobile data.
How WEBM compression works
When you compress a WEBM file, our tool analyzes the data and removes redundancies — reducing the overall file size while preserving as much quality as possible. You can choose between maximum compression (smallest file, some quality trade-off) or balanced compression (best quality-to-size ratio). Either way, the process takes just seconds and happens entirely in the cloud — no software to install.
More than just a WEBM compressor
HappyScribe isn't just a compression tool — it's a full video toolkit. After compressing your WEBM file, you can convert it to another format, transcribe video to text, or trim your video — all from the same browser window. No account needed for any of it.
Frequently Asked Questions
How much can I reduce a WEBM file?
Depending on the original file and your settings, you can typically reduce a WEBM file by 40% to 90% of its original size. The exact result depends on the content and the compression level you choose.
Does compressing WEBM reduce quality?
Our compressor uses smart algorithms to minimize quality loss. At balanced settings, most people can't tell the difference between the original and the compressed file. You can also choose a lighter compression for maximum quality preservation.
Is there a file size limit?
We support files up to 4 GB each in the free version.
Are my WEBM files secure?
Absolutely. All transfers are secured with TLS 1.3, and your files are automatically deleted from our servers after processing. We never store, share, or access your content.
Can I compress WEBM files on mobile?
Yes — our WEBM compressor works directly in your browser on any device. No app required. It runs smoothly on iOS Safari and Android Chrome.
How do I compress a WEBM file for email?
Upload your WEBM file to our compressor, select maximum compression to get the smallest file size, and click Compress. Most email providers accept attachments up to 25 MB — our tool can typically get your file well under that limit.
Can I compress multiple WEBM files at once?
Yes. You can upload and compress several WEBM files in one session. Simply add all the files you want to compress and process them together — no need to repeat the steps for each file.
How to open a WEBM file?
Chrome, Firefox, Edge, and Android open WebM natively. Safari plays WebM starting macOS 14 with AV1 hardware decoders. Older editors may require transcoding to ProRes or H.264 MP4.
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