Are my videos uploaded to a remote server for compression?

No. All compression happens locally on your computer or phone using the browser's native WebCodecs API. Your videos never leave your device.

Will compressing my video make it look blurry or pixelated?

No. The compressor uses smart bitrate allocation and hardware-accelerated encoding to remove unnecessary data while keeping the video sharp and clear to the human eye.

Can I compress multiple videos simultaneously?

Yes. You can select multiple videos at once, apply your target quality setting, and batch download the compressed results as a single ZIP archive.

Which video formats does the compressor support?

You can compress MP4, WebM, MOV, and AVI files, and export them as highly compatible MP4 or WebM formats.

Video Compressor

Compress MP4 and WebM videos online for free. Reduce video file size by up to 80% locally in your browser using GPU acceleration, with zero server uploads.

Select your file here to get started

or drop your file here.

.mp4.webm.mov.avi

Max 2000MB. 100% Private. Files never leave your device.

What to expect

Experience fast, secure, and completely private processing directly inside your web browser.

Massive Size Reduction

Cut video file sizes by up to 80% while retaining smooth playback and visual clarity.

GPU-Accelerated Speed

Leverages your device's hardware encoder for blazing-fast compression without draining your CPU.

Strict Data Protection

Your personal videos, screen recordings, and confidential footage stay 100% on your device.

How it works

Simply upload your content, adjust your settings, and download the result instantly.

Add Your Videos

Drag and drop one or multiple MP4, WebM, MOV, or AVI files into the browser.

Choose Compression Level

Pick a quality preset or specify an exact target file size in KB or MB.

Download Optimized Videos

Save your smaller videos individually or download all files together in a ZIP archive.

Frequently Asked Questions

Get quick answers about supported formats, data privacy, and using this tool.

Video Compressor - Compress MP4 and WebM videos online for free. Reduce video file size by up to 80% locally in your browser using GPU acceleration, with zero server uploads.

About This Tool

Shrink large video files without sacrificing visual quality. Whether you need to meet strict upload limits for Discord, WhatsApp, email, or web portals, this client-side video compressor reduces MP4 and WebM file sizes by up to 80%. Traditional online video compressors force you to upload massive files to remote servers, wasting hours on upload/download times and exposing your private videos to privacy risks. Our compressor runs entirely in your browser, utilizing your device's built-in GPU (via the WebCodecs API) to re-encode videos at lightning speed. Your files never leave your device. Set specific target file sizes in kilobytes or megabytes, or select smart compression presets. Batch-process multiple videos simultaneously and download the optimized files individually or packaged in a ZIP archive.

video compressorreduce video sizemp4 compressorwebm compressorvideo tools

100% Open Source & Trustworthy

Every tool on PrivateTools is fully open source and runs entirely in your browser. No server uploads. No tracking. No hidden code. You can verify the source code yourself on GitHub at any time.

Open Source Code

Full source code available on GitHub — inspect, fork, or contribute.

Verify & Audit

Read every line of code. Nothing is hidden. Total transparency.

Browser-Local Processing

Files never leave your device. Zero server uploads. 100% private.

Community & Support

PrivateTools is built by the community, for the community. Found a bug? Have a tool idea? Want to report an issue? We'd love to hear from you. Every contribution makes these tools better for everyone.