↓
Reduce large files
Lower bitrate, resolution or frame rate to make videos easier to store, upload and share.
Fast browser-based video compression
Compress Video Online Without Complicated Software
Reduce video file size directly in your browser with practical quality, resolution, frame-rate and audio controls. Your selected video is processed locally by the browser.
VIDEO
SIZE ↓
WEBM
↑
Drop your video here
or click to choose a video from your device
MP4, WebM, MOV and other browser-supported video formatsBuilt for practical compression
Simple controls, meaningful size reduction
Choose a preset when you want speed, or tune the output when file size matters more.
◇
Keep the aspect ratio
When a smaller resolution is selected, the compressor scales the video proportionally instead of stretching it.
◎
Process in your browser
The tool uses the browser's MediaRecorder pipeline for supported video playback and encoding, without sending the selected file to a conversion server.
How it works
Compress a video in three steps
No desktop editor or complicated export workflow is needed.
01 · UPLOAD
Select a video
Drop a video into the converter or choose one from your device. The browser reads the file locally.
02 · ADJUST
Pick compression settings
Use a preset or control resolution, frame rate, audio bitrate and video bitrate.
03 · DOWNLOAD
Save the smaller file
After encoding finishes, preview the result and download the compressed WebM file.
Common uses
When a video compressor helps
Email and messaging
Make short recordings smaller when the original file is too large for an attachment or chat upload.
Faster uploads
Reducing resolution or bitrate can shorten transfer times when bandwidth is limited.
Storage cleanup
Create smaller copies of recordings when full-resolution originals are not necessary for everyday viewing.
Free online video compressor
Video compression reduces the amount of data required to store or transmit a video. The biggest factors are usually resolution, frame rate, codec efficiency and bitrate. This Video Compressor gives you direct control over several of those factors instead of hiding everything behind a single compression button.
The default balanced preset is designed as a practical starting point. If the file still feels too large, lowering the resolution or frame rate usually produces a bigger reduction than making tiny changes to audio. If preserving detail is more important, use the quality preset and keep the original resolution where possible.
What happens during compression?
This page uses the browser's native video playback and MediaRecorder APIs. The selected video is decoded by the browser and re-encoded into a browser-supported WebM stream. Because encoding happens on the device, processing speed depends on the video, browser, hardware and selected settings.
Why does the output use WebM?
Browser MediaRecorder support varies by operating system and browser. WebM with VP9 or VP8 is widely supported for browser-side recording and provides a practical client-side output path without requiring a large server-side conversion system. The tool checks supported MIME types before starting and selects the requested WebM profile when the browser supports it.
Compression versus quality
There is no universal setting that makes every video smaller without any visible change. A high-resolution screen recording, a fast action clip and a talking-head video can respond differently to the same bitrate. For a quick reduction, start with Best balance. For a smaller result, try Smallest file or lower the resolution. For higher fidelity, use Best quality.
Privacy-conscious browser processing
The conversion workflow is designed to keep the selected source video in the browser. No upload endpoint is used by this page for the compression operation. Your browser still creates temporary local object URLs for preview and download, which are released when you replace or remove the file.
FAQ
Video Compressor questions
Clear answers about formats, quality, privacy and browser support.
What does a video compressor do?
It re-encodes a video with settings that require less data, such as a lower bitrate, smaller resolution or lower frame rate. The result is a smaller video file.
Will compression always reduce video quality?
Not necessarily in an obvious way, but stronger compression usually involves some quality trade-off. The amount depends on the source video and the selected bitrate, resolution and frame rate.
Which setting should I use first?
Best balance is a sensible starting point. If the result is still too large, try Smallest file or reduce the output resolution. If detail matters more, try Best quality.
Why is my output a WebM file?
This browser-based version uses MediaRecorder for local encoding. WebM with VP9 or VP8 provides a practical browser-native output format without requiring a server-side conversion service.
Can I compress an MP4 video?
If your browser can play the MP4 and exposes a supported MediaRecorder WebM encoder, the tool can use that video as its source and create a compressed WebM copy.
Can I remove the audio track?
Yes. Select Remove audio before starting compression. This can reduce the output size further for clips where sound is not needed.
Does lowering resolution reduce file size?
Usually, yes. Fewer pixels mean less video data needs to be encoded. The resolution control keeps the original aspect ratio while scaling down when necessary.
Can I compress a video on a phone?
Yes, on browsers that support the required video playback and MediaRecorder features. Mobile devices may take longer to encode large or high-resolution videos.
Are my videos uploaded to a server?
This page's compression workflow is browser-based and does not send the selected video to a conversion endpoint. The browser processes the file locally and creates the downloadable result on the device.
Why might a video fail to compress?
The browser may not support the source codec, the requested recording format, or the device may run out of memory for a very large video. Try a common MP4/H.264 source, Chrome or Edge, and a smaller resolution if the file is unusually large.
Make your video easier to share
Reduce file size with browser-based controls for quality, resolution, frame rate and audio.
Compress a video