Shrink WebM videos in seconds, right in your browser — no upload, no signup.
WebM Compressor shrinks the file size of .webm videos — the free, open format built for the web and used by YouTube and most browsers' built-in video playback — while keeping it a WebM file. A quality slider lets you trade a bit of sharpness for a smaller file, so you decide how far to push it. Everything happens right here in your browser — your device does the work instead of a server, so your footage is never uploaded anywhere.
Drag and drop your .webm files, or click to browse. You can add several at once.
Use the slider or a quick preset, then click Compress. A progress bar shows you how it's going — everything happens on your device, so it can take a few minutes for a longer clip.
Save each file individually, or download every compressed file at once as a .zip.
Your videos are processed locally and never leave your device.
Works straight in your browser — no software, no account, no email.
WebM's format was designed to compress harder than most at the same visual quality, so files often end up smaller than an equivalent MP4.
Compress as many videos as you like, with no limits or hidden fees.
Shrink MP4 videos in seconds, right in your browser — no upload, no signup.
Shrink MOV videos in seconds, right in your browser — no upload, no signup.
Shrink AVI videos in seconds, right in your browser — no upload, no signup.
Shrink MKV videos in seconds, right in your browser — no upload, no signup.
Shrink MP4, MOV, WebM, AVI and MKV videos in your browser — no upload, no signup.