Video Compressor
Shrink videos online (H.264/AAC) – quality via CRF slider, optionally reduce resolution, without uploading
Compression runs entirely locally in your browser (ffmpeg.wasm) – the video never leaves your device. Large files take time and memory accordingly.
Local Video Compression in Your Browser
Our video compressor uses advanced ffmpeg.wasm technology to process your files directly within your web browser. This means your videos are never uploaded to a remote server, ensuring maximum privacy and security. By handling the compression locally, we eliminate data transfer risks while providing high-quality H.264 and AAC encoding. You can shrink large video files quickly without worrying about where your personal content is stored or processed during the optimization process.
Custom Quality and Resolution Settings
Take full control over your output with our intuitive compression tools. Use the CRF slider to balance file size against visual quality, ranging from high-quality preservation to aggressive compression for smaller sizes. Additionally, you can choose to reduce the video resolution to further decrease the footprint. These options allow you to tailor every video for specific platforms or storage needs while maintaining the best possible visual clarity using standard H.264 and AAC formats.
Frequently asked questions
Is my video uploaded to a server?
No, your video is never uploaded. The compression happens entirely within your browser using ffmpeg.wasm technology. This ensures that your private data remains on your local device at all times, providing a secure way to shrink files without compromising your privacy or needing an internet connection for the actual processing.
What does the CRF slider do?
The CRF (Constant Rate Factor) slider allows you to choose the balance between quality and file size. A lower value maintains higher visual quality but results in a larger file, while a higher value provides stronger compression for much smaller files. It gives you precise control over the final output quality.
Why does it take time to compress large videos?
Since the processing happens locally on your device rather than on a powerful remote server, the speed depends on your computer's hardware and memory. Large files require more resources and time to encode using ffmpeg.wasm, so we recommend ensuring you have enough system memory available for smooth performance during the compression process.