Video Compressor

Free batch video compressor allows you to reduce videos file size online without losing quality.

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1GB Maximum File Size

Unlimited Conversions/Compressions

High Speed Conversion

High Speed Compression

30 Concurrent Conversions

How to compress video?

1

Step 1: Add Video Files

Click Choose Files button to upload video file(s) from your computer or network disk.

2

Step 2: Reduce Video Size Online

Custom video resolution, size, bitrate and output format as needed to compress video, and then click the bottom Compress button.

Pro Tip: Choose More Settings to compress video to a certain size or flexible size without losing quality.

3

Step 3: Save Your Compressed Video(s)

In one click, hit Download option to save the final video(s) locally or to Dropbox or Google Drive.

Compress MP4 | Compress MOV | Compress WEBM | Compress MKV | Compress AVI | Compress WMV | Compress 3GP

Why choose the best video size reducer - Online UniConverter

Privacy Security

Online UniConverter (originally Media.io) is an absolutely secure HTTPS (SSL) connection website, all the uploaded and compressed files are automatically removed from our servers within 24 hours, we promise! You can upload your files without extra safety worries.

Easy to Use & Convenient to Share

You can compress MP4 or other videos of any format online just via a web browser, without any software or app download. That's, Windows/PC, Mac, Linux, iOS, Android are all supported.
Save the compressed video to Dropbox and share on WhatsApp, YouTube, Instagram, Facebook, etc. or for sending via Email.

Any Resolution & Format Supported

You can compress video online free in any resolution including 1080p, 720p, 480p, 360p, 240p, and other non-standard options. Video formats like MP4, WEMB, MOV, AVI, MKV, WMV can be compressed online.

Smart Output Settings

Smart video file size shrinker helps free up your limited space with one click, and further customization like video resolution, output size, and format are also available. It's bound to be a reliable way to reduce video size without losing quality!

No Watermark & No File Limits

Compress video size without any watermark added. You can shrink video file size one by one without quantity limit after signing up.

Fast Compression Speed

This robust video compressor is designed to quickly yet correctly reconstruct your file's original data. Your demand for efficiency is our pursuit!

FAQs about online video compressor

  • 1. How to compress large video files to small size online free?

    You're enabled to compress large MP4 video files with Online UniConverter (Originally Media.io) with 3 easy steps.
    1. Add your MP4 files to the online MP4 compressor by clicking the Choose Files button or uploading from Google Drive/Dropbox.
    2. Choose the target preset like resolution and shrink rate from 30% to 100%, or select More Settings to adjust certain video file size or variable bitrate. Next, click Compress button to start batch video compression.
    3. Download the compressed MP4 file to local computer or Google Drive/Dropbox. If you want to compress MP4 files without internet speed limitation, you can try Wondershare UniConverter desktop version to compress MP4 offline.

  • As for online file compressor, there is no double that Online UniConverter (Originally Media.io) is one of the best video compressors. It can compress video, audio, image files easily without ads and sign-up. Concerning desktop solution, Wondershare UniConverter is the best video compressor without quality loss.

  • You only need to find a right online video compressor like Online UniConverter, a trustworthy video MB reducer, via which you can compress a video file online with hassle-free steps.
    Please be noted that when choosing the best video compressor, it's more than vital to make sure it's an ad-free site without viruses.

  • Technically speaking, a video file size is largely related to video length, frame rate, bitrate, resolution and encoding settings.

    Basically, there are 2 simple ways to make your video smaller with high visual quality.
    1. Cut short the large video.
    2. Utilize a handy online HD video compressor, with which you can smartly setting compression parameters or apply its best default settings, to get the video minimized with original quality.

    Read more: How to make my video shorter with free online video editor?

  • In order to make a video smaller to email, you might be told to Zip it on Windows, shorten the video via iMovie on Mac, or download and install a video converter or compressor app on your Android/iPhone and so forth, to reach your goal. But! Here, good news for you: Online UniConverter Video Compressor is the quickest and easiest way to help you eliminate any inconvenience. The free cross-platform video size reducer can make your large video smaller without altering its quality. Moreover, it includes simple and advanced settings for you to adjust specific parameters of files. It's amazing!
    Here is a simple guide to compress video file to email on Windows/Mac/Android/iPhone:
    Step 1: Visit Online UniConverter Video Compressor and upload your large video.
    Step 2: Choose a compressing mode and certain parameter to reduce size in good quality.
    Step 3: Download the compressed video locally to send email or save to Dropbox/Google Drive and directly copy the link as attachment in Email.