Compress videos for free with no sign-in or credits required. Processing runs privately on your device and exports a ready-to-use MP4 without uploading the file.
or click to browse · Max 2 GB
MP4 · MOV · WebM · MKV · AVI and more▣Your video stays on your device — nothing is uploaded to AirMore or any processing server.
Instead of sending a large private video to a remote processing queue, AirMore reads, decodes and re-encodes it inside the current browser tab.
When you specify a file size, AirMore works backward from that target. It calculates a suitable bitrate from the video duration, reserves room for audio and may reduce resolution when a very small target would otherwise look poor.
Your video stays on your device — nothing is uploaded to AirMore or any processing server.
Both choices use the same private, on-device processing path. Pick the result you care about instead of dealing with a generic Auto or Manual mode.
Best when a message, email or website has a file-size limit.
Best when resolution, motion smoothness or sound quality matters more than an exact size.
The video is decoded, resized, encoded, and packaged as MP4 on your device.
File data stays inside your browser and is never sent to a processing API.
WebCodecs uses the video capabilities available on your device for faster encoding.
Choose a practical file size or enter an exact target without calculating bitrate yourself.
Shrink one video at a time before sending, publishing or archiving it.
Fit clips under attachment limits for chat apps and community platforms.
Reduce a presentation, update or recorded explanation before attaching it.
Create a lighter MP4 for a landing page, article or content-management system.
Save storage space for clips where full source quality is no longer necessary.
Compression removes information. The useful result is not always the smallest file, but the smallest file that still looks and sounds right for its destination.
Target mode calculates bitrate before encoding. Complex motion can make the result land slightly above or below the selected size.
A 1080p video with too little bitrate may look worse than a clean 720p version. For aggressive compression, reducing resolution often helps.
Video length, resolution, browser support and available CPU/GPU resources determine processing time.
Choose a local video, set the output goal and download the MP4 when processing finishes.
Select a local video or drag it into the upload area.
Use a size preset or set resolution, bitrate, frame rate, and audio quality manually.
Preview the result and save the compressed video to your device.
Practical answers about privacy, formats, output size and browser support.
No. Compression runs locally in your browser. Only the compressor code is downloaded; the selected video is not sent to AirMore or a processing server.
MP4, MOV, WebM, MKV, AVI, M4V and other common containers can work. Actual support depends on the audio and video codecs available in your browser.
Target-size mode calculates an encoding bitrate from duration and audio allowance. Video complexity and browser encoder behavior can make the final file slightly larger or smaller.
The preferred WebCodecs path starts quickly. If your browser or source codec needs compatibility mode, the browser downloads and initializes ffmpeg.wasm once.
Yes on modern mobile browsers, but long or high-resolution videos may exceed available memory. Closing other tabs and choosing 720p can help.
Usually yes, because a smaller file stores less video information. Moderate bitrate or resolution reductions are often hard to notice, while aggressive targets may show softness or block artifacts.
Choose a file and compress it privately in this browser tab.
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