Free online video toolbox that runs entirely in your browser.
Compress, convert, trim, transcribe and retouch video — 90 tools, no upload, no watermark, no sign-up. Files never leave your device.
Compress Video
Compress & Optimize
Compress to Target Size
Compress & Optimize
Compress GIF
Compress & Optimize
MOV to MP4
Convert Formats
MKV to MP4
Convert Formats
WebM to MP4
Convert Formats
AVI to MP4
Convert Formats
Video to GIF
Convert Formats
Video Screenshot
Convert Formats
Video to Frames
Convert Formats
Images to GIF
Convert Formats
Images to Video
Convert Formats
Compress Image
Image Tools
Resize Image
Image Tools
Crop Image
Image Tools
PNG to JPG
Image Tools
JPG to PNG
Image Tools
Image to WebP
Image Tools
MP4 to MP3
Audio Tools
Extract Audio
Audio Tools
Trim Audio
Audio Tools
Compress Audio
Audio Tools
Merge Audio
Audio Tools
Change Audio Volume
Audio Tools
Trim Video
Video Editing
Merge Videos
Video Editing
Split Video
Video Editing
Resize Video
Video Editing
Crop Video
Video Editing
Rotate Video
Video Editing
Mute Video
Video Editing
Add Watermark
Video Editing
Add Subtitles
Video Editing
Add Music to Video
Video Editing
Files processed locally: 9
About ZMQ Tools
ZMQ Tools is a free online video toolkit with 75+ tools for compressing, converting, extracting audio and editing subtitles. Everything runs on WebAssembly and in-browser AI models on your own device — files never leave your browser. No sign-up, no watermark.
Are my files uploaded to a server?
No. Every tool runs on WebAssembly inside your browser tab. Your files are processed locally and never leave your device — that is the whole point of this site.
Is it really free, without watermarks?
Yes. All tools are free with no watermarks and no sign-up.
Which browsers are supported?
Any modern browser with WebAssembly: Chrome, Edge, Firefox and Safari. With SharedArrayBuffer enabled, multi-threaded mode kicks in automatically for faster processing.
How large can my files be?
Because processing happens in your browser memory, files up to roughly 1.5 GB work on desktop. Larger files are better handled with the compress tools first.