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Compress Multiple Videos in Your Browser

Shrink a folder of videos in one pass, typically several times smaller, with little visible quality loss.

  • Compress many videos at once with one set of settings
  • Quality presets balance file size against detail; pick the higher preset when fidelity matters
  • Optional width cap is the fastest way to shrink huge files
  • Optional audio removal trims further size when you do not need the soundtrack
  • Download individually or as a ZIP

Overview

The most common reason to compress video is also the most boring: the file is too big to email, upload, or attach. The fix is rarely complicated. Drop the bitrate, optionally cap the width, and the file shrinks dramatically with little visible difference at typical viewing distances.

This tool runs the same recipe over a whole folder. Pick a quality preset (which controls target bitrate), optionally set a maximum width, and every clip in the queue compresses against the same settings. A 1-minute 4K iPhone clip can shrink several times over at the balanced preset. Already-compressed downloads shrink less. Ratios vary with content.

All of this happens in your browser. There is no upload, no per-file size limit, and no concurrent-job limit beyond what your device can handle.

Technical notes

Quality presets

The higher preset retains more detail at a larger file size. Balanced is a good default for sharing. Smaller is for previews and quick reviews. Match source caps the bitrate around the source for format-only conversions. Higher resolutions need more bitrate to look the same; lower resolutions need less.

Width is the biggest lever

Halving the width (1920 to 960) cuts the pixel count to roughly a quarter and shrinks the file along with it at the same quality preset. It is usually the most effective compression knob.

Expected reductions

iPhone 4K source: often shrinks dramatically at the balanced preset. Screen recordings: often shrink moderately. Already-compressed YouTube downloads: shrink only a little. Heavy motion shrinks less than mostly-static content.

Good to know

Already-compressed downloads shrink less

Files that have already been through a service-side encoder (YouTube downloads, social re-encodes) start near the efficient end of the curve. Expect modest reductions on those, not dramatic ones.

Quality is perceptual

High-motion content (sports, action, fast pans) reveals compression artifacts sooner than static content. Use the higher preset and keep the original width if archive quality matters.

Width drives most of the savings

If a file refuses to shrink at the balanced preset, dropping the width usually has more impact than dropping the quality preset further.

How to compress many videos at once

Reduce the size of a batch of video files locally in your browser.

01

Add your videos

Drag and drop the videos you want to compress into the queue.

02

Pick a quality preset

Balanced is a good default for sharing. Smaller is fine for previews and quick reviews.

03

Optionally cap the width

Setting width to 1280 or 720 is the fastest way to shrink huge 4K source files.

04

Convert and download

Start the batch and download files individually or as a ZIP when they are ready.

Frequently Asked Questions

Are my files uploaded anywhere?

No. Compression runs in your browser via WebCodecs and the file stays on your device.

How much smaller will my files be?

Typically much smaller for original phone or screen-recording footage; less for already-compressed downloads. Ratios depend on the source content and chosen settings.

Will compression hurt quality visibly?

At the higher preset on the original width, generally no. The balanced preset is a good call for sharing and looks essentially identical on phone and laptop screens for most content. The smaller preset is for quick previews.

What is the fastest way to shrink a huge 4K file?

Cap the width at 1280 or even 960. Width is the dominant lever; quality preset is a secondary adjustment after that.

Which browsers does this work in?

Conversion uses the WebCodecs API. Fully supported: desktop Chrome 94+, Edge 94+, Opera 80+, Firefox 130+, and Safari 26+. Safari 16.4 to 25 work for most files but some may fail because their WebCodecs implementation is partial. Browsers without WebCodecs (Chrome/Edge <94, Firefox <130, Safari ≤16.3, Internet Explorer) cannot run the converter at all. Mobile browser support is improving but inconsistent, so a desktop or laptop is recommended for batch work.

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