PrivConvert

Media tool

Compress Video

Shrink a short video with quality presets, resolution limits, and automatic size fallback.

Input
Choose a MP4, WebM, MOV, or MKV file
Output
MP4 files
Limits
1 file · 100 MB max · 180 sec max

Processing runs on your device when supported. Network requests may load the app and supporting assets. Privacy details

Add your input

Your file stays in this browser.

Settings

Good to know1 file · 100 MB max · 180 sec max
Choose a MP4, WebM, MOV, or MKV fileResult: MP4 files
  • Your media file stays in this browser while the tool runs.
  • Short clips work best. Large or complex files may take longer or fail.
  • Compression outputs H.264/AAC MP4 for broad playback compatibility.
  • Balanced, Strong, and Smallest reduce oversized video resolution as well as codec quality.
  • Only the first video and optional first audio track are kept; subtitles, data tracks, chapters, and metadata are removed.
  • The original video is returned by default when the encoded MP4 is not smaller.

Next tools

Keep working with this file

Resize VideoResize a short video to a target width and height.TrimCut a short video clip by start time and duration.Burn subtitlesBurn SRT/VTT text subtitles into a short video.Audio to MP3Convert a short audio file to MP3.

How it works

How to use Compress Video online

  1. Choose a supported video up to the published 100 MB and 180-second limits.
  2. Choose a compression level, audio bitrate, and whether to retain the audio track.
  3. Run compression in your browser, compare the result, and download the new video.

Overview

Compress short videos with practical size presets

Reduce a short video's size by combining H.264 quality settings with a maximum resolution and an appropriate audio bitrate. The output is a broadly compatible MP4, and the original is kept automatically when re-encoding would make it larger.

Input

Choose a MP4, WebM, MOV, or MKV file

Output

MP4 files

Limits

1 file · 100 MB max · 180 sec max

Best for

Compress Video use cases

  • Reduce a short clip before attaching or sharing it.
  • Downscale a high-resolution clip while choosing an audio quality level.
  • Re-encode a browser-supported clip without an account-based upload history.

Processing

What happens in your browser

PrivConvert uses ffmpeg.wasm for this workflow. 4 adjustable settings. This tool checks for wasm support before running

Your media file stays in this browser while the tool runs.

Related tools

Resize VideoTrim VideoAdd Subtitles to VideoAudio to MP3Extract Audio from VideoMute Video

FAQ

Compress Video questions

See how privacy works

Is Compress Video free to use?

Yes. This tool is free to use in your browser and does not require an account.

Is processing local?

Compress Video uses ffmpeg.wasm in the browser. Selected input is processed on your device when the required browser features are available. Application, library, model, security, and limited analytics requests may use the network.

What limits should I know about?

1 file · 100 MB max · 180 sec max. Short clips work best. Large or complex files may take longer or fail.

How do the compression levels differ?

High quality keeps up to 1080p, Balanced limits width to 1280 pixels, Strong uses 960 pixels, and Smallest uses 720 pixels with progressively stronger codec compression.

Will every compressed video be smaller?

Not always. Already-efficient videos may not shrink. With the default fallback enabled, the original file is returned instead of a larger encoded copy.