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Best Online Video Compressors

動画編集と圧縮作業をするデスク

Online video compressors reduce video file size without installing desktop software. They are useful when a file is too large for email, chat, a form upload, a website, or social media. If you are optimizing images rather than videos, see the online image compression tools guide.

This guide compares online video compressors by use case, with screenshots and official links adjusted for English-speaking users.

Table of Contents

  1. How to Choose an Online Video Compressor
    1. Check the File Size Limit
    2. Check How Quality and File Size Are Controlled
    3. Be Careful with Private Videos
  2. Recommended Online Video Compressors
    1. FreeConvert Video Compressor
    2. Clideo Video Compressor
    3. VEED Video Compressor
    4. Compress2Go
  3. Best Choice by Use Case
  4. Things to Check Before Compressing a Video
  5. Summary

How to Choose an Online Video Compressor

Check the File Size Limit

Free upload limits vary widely between services. A short social clip may be small enough for most tools, but phone videos and screen recordings can easily exceed hundreds of megabytes.

Check the file size limit before uploading. If a tool rejects the file after upload, you lose time twice: once for the upload and once for finding another service.

Check How Quality and File Size Are Controlled

There are three common ways to reduce video file size.

  • Lower the bitrate
  • Lower the resolution
  • Change the codec or format

If you only need a smaller file, an automatic compressor is fine. If quality matters, choose a service that lets you adjust resolution, target size, or quality settings.

Be Careful with Private Videos

Many online compressors upload your video to a server for processing. That is convenient for casual clips, but it may not be appropriate for client files, internal training videos, school recordings, medical content, or anything with personal information.

For sensitive videos, use trusted local software instead of a browser upload tool.

Recommended Online Video Compressors

FreeConvert Video Compressor

FreeConvert Video Compressor official website screenshot

https://www.freeconvert.com/video-compressor

FreeConvert Video Compressor is useful when you want more control over output size and quality. It supports many formats and offers settings such as compression target, quality, and resolution.

It is a good first choice for larger files and users who want to adjust more than one setting. Beginners can start with the default settings, then reduce resolution or target size if the file is still too large.

Clideo Video Compressor

Clideo Video Compressor official website screenshot

https://clideo.com/compress-video

Clideo Video Compressor is a simple browser tool for quick compression. It is better for one-off jobs than for detailed encoding control.

Clideo also offers other online video tools, so it is convenient if you want to trim, convert, or edit after compression.

VEED Video Compressor

VEED Video Compressor official website screenshot

https://www.veed.io/tools/video-compressor

VEED Video Compressor is useful when compression is part of a broader editing workflow. You can compress a video and then continue with trimming, subtitles, or social video edits.

It can feel heavier than necessary for a single quick file, but it is practical for creators who already need editing tools.

Compress2Go

Compress2Go Video Compressor official website screenshot

https://www.compress2go.com/compress-video

Compress2Go is a straightforward upload-compress-download tool. It is useful when you want to reduce file size without opening a full editor.

It is a good option for casual files, but as with any online compressor, avoid uploading sensitive videos unless you have checked the service terms and privacy expectations.

Best Choice by Use Case

Use CaseRecommended Tool
More compression settingsFreeConvert
Simple one-off compressionClideo
Compression plus editingVEED
Straightforward file reductionCompress2Go

Things to Check Before Compressing a Video

Before uploading, check the original file size, resolution, and length. If the video is too long, trimming unnecessary parts first can reduce size more naturally than heavy compression.

After compression, play the exported file before sharing it. Check audio, subtitles, text readability, and whether the file opens on the device where it will be used.

Summary

Use FreeConvert when you want settings and format control, Clideo for quick one-off compression, VEED when compression is part of editing, and Compress2Go for a simple browser-based workflow. For sensitive videos, keep the work local.