Compress Video Online Free – Reduce Video File Size

How to use the Video Compressor

Phone videos are big: a one-minute clip filmed in 4K can be several hundred megabytes, which is too large for most email attachments, chat apps and upload forms. This video compressor re-encodes your video with the efficient H.264 codec, which every phone, computer and website can play.

Choose a video and pick a quality. Balanced suits most clips; Small file and Smallest file save more space with some softness. Lowering the maximum resolution (for example from 4K or 1080p to 720p) gives the biggest saving, and 720p still looks sharp on a phone screen. You can also remove the sound if you do not need it.

Press Compress video. The first time, your browser downloads the free FFmpeg engine (about 31 MB) and caches it. The work then happens on your own device, so speed depends on how fast it is: a short phone clip usually takes under a minute, while long or 4K videos can take several minutes. When it finishes you can play the result, see the before and after file size and download the MP4.

Which settings should I use?

For WhatsApp, choose Small file and 720p; WhatsApp compresses videos again anyway, so starting smaller saves your data. For email, most services cap attachments at around 20 to 25 MB, so pick Small file and 480p or 720p for longer clips. For Discord, check the upload limit shown in the app for your account, then pick a setting that brings the file under it. For keeping a good-quality archive copy, choose High quality and Keep original resolution.

If the result is still too big, the quickest extra saving is to cut away parts you do not need with the Video Trimmer before compressing. Removing the sound with Mute Video also helps if the audio is not important.

How video compression works

A video file is mostly made of the picture data. The compressor decodes every frame and encodes it again with H.264 at a quality level called CRF: a lower number keeps more detail, a higher number throws away detail your eyes are less likely to notice, such as fine noise in dark areas. Scaling down the resolution reduces the number of pixels in every frame, which is why it saves so much space.

Because the video is re-encoded, compression cannot add quality that was not there. If your video was already compressed by a messaging app, the saving may be small. In that case the tool will tell you the before and after size so you can decide whether to keep it.

Tips for the best result

Close other heavy tabs and apps while compressing a long video, especially on a phone, because the work uses your device’s memory and processor. Keep the screen on until it finishes. Very long videos (over about 10 minutes) are better split into parts with the trimmer.

VSH take: most online compressors make you upload your private videos to a server, wait in a queue and then add a watermark or a size limit. This one runs entirely in your browser, so your family videos and work clips stay on your device. Use these tools only on videos you made or have permission to edit.

More free video tools

• Video Trimmer
• Video to GIF
• Video to MP3
• Resize Video for Reels
• Video Speed Changer
• Mute Video
• Rotate & Flip Video
• Add Text to Video
• Video Frame Grabber
• Blur Part of a Video
• Add Watermark to Video

Need words instead of pictures? Audio to Text turns the speech in a video into text, and the Screen Recorder captures your screen to video. Read how to transcribe audio to text free.