Online Video Compressor

Create stunning videos and audio with ease! Convert, trim, merge, and more—100% free and effortless!

Drop or choose your video files

The assistant opens with your files and does the rest.

Choose Files

How to Compress Video Online for Free

Drop Your Video

Drag and drop your video onto the box above, or click Choose Files. It takes MP4, MOV, MKV, WebM, AVI and FLV videos.

Say How Small

The request asks for a smaller file. For precise control, say the size or settings you need, for example “Compress this under 25 MB” or “Compress this to 720p”. The AI assistant shows its plan (target size, resolution, frame rate) before it starts.

Save the Compressed Video

Click Start compression and wait for the process to finish. Once done, click Save to keep your high-quality, reduced-size video file.

Why Use Our Online Video Compressor?

Reducing video file size shouldn't mean sacrificing visual quality. Our online video compressor uses advanced algorithms to ensure your videos remain crisp and clear while becoming much easier to share via email, social media, or messaging apps.

Whether you need to compress MP4 files for YouTube or reduce video file size for WhatsApp, our tool provides a fast and secure solution. All processing happens directly in your browser, meaning your private videos never leave your computer.

Privacy First: Browser-based processing keeps your data safe.
No Upload Limits: nothing is uploaded, so 4K files up to about 2 GB each are fine; that is the in-browser engine's memory ceiling. An AVI or FLV compressed to WebM by the AI assistant can be up to 512 MB.
Format Support: Works with MP4, MKV, AVI, MOV, WEBM, and more.
Totally Free: No hidden costs, watermarks, or registrations required.

Frequently Asked Questions

Will I lose quality when I compress my video?

Our compressor uses smart encoding technology to minimize quality loss. While reducing file size always involves some compression, our tool is optimized to keep the visual quality as high as possible.

What is the best format for video compression?

MP4 with H.264 is the most widely compatible choice for a small, good-looking file. H.265 (HEVC) compresses further, but not every device plays it. The AI assistant compresses MP4, MOV and MKV to H.264, and WebM to VP9.

How long does it take to compress a video?

The speed depends on your computer's performance and the video size, as all processing happens locally in your browser. Typically, a few minutes of video takes only seconds to compress.

Is it safe to compress my private videos here?

Absolutely. Unlike other online converters that upload your files to their servers, our tool processes everything locally on your device. Your files are never uploaded, ensuring 100% privacy.

How do I compress a video for email?

Most email providers have a 25MB attachment limit. Ask the assistant to “compress this under 25 MB”, or, in the classic compressor, pick a smaller profile under 'Recommended Settings' or lower the 'Bitrate' under 'Custom Settings'.

Can I compress multiple videos at once?

Yes. Open the classic compressor on this page to upload multiple video files and compress them in one batch. This saves you time when dealing with many videos.

Does compressing a video reduce its resolution?

Not necessarily. You can choose to keep the original resolution while reducing the bitrate, or you can lower the resolution (e.g., from 1080p to 720p) to achieve even greater size reduction.

Which video formats are best for compression?

MP4 (H.264) is the most compatible format, while HEVC (H.265) compresses better but plays on fewer devices. The AI assistant compresses MP4, MOV and MKV to H.264, and WebM to VP9.