Reduce video file size instantly in your browser - no upload needed
Reduce the file size of MP4, MOV, WebM and other videos directly in your browser. Your files stay on your device - nothing is uploaded. Pick a target size for email, WhatsApp or Slack and VidShift handles the rest. Works offline, no signup required.
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🔒 Your files never leave your device - 100% private & secure
VidShift compresses video by re-encoding at a lower bitrate while keeping the resolution you choose. To minimise visible quality loss, select the largest target size that meets your needs. Downscaling resolution - for example, from 4K to 1080p - often gives a bigger size reduction than lowering bitrate alone, and the result still looks sharp on most screens. Because processing runs locally in your browser, you can experiment with different settings without waiting for uploads.
There is no hard limit. The practical limit depends on your device's available memory. Most modern computers handle files up to several gigabytes. For very large files, try lowering the resolution to reduce memory usage during compression.
Select the Email preset (25 MB target) after loading your video. VidShift will automatically calculate the right bitrate to fit your video within the 25 MB limit. For shorter videos, the quality will be higher. For longer videos, you may want to also lower the resolution for best results.
Select the WhatsApp preset (16 MB target). WhatsApp has a 16 MB file size limit for video messages. VidShift will calculate the optimal bitrate to fit within that limit. For longer videos, trimming to just the part you need with the video trimmer is another effective way to reduce file size before compressing.
Some quality reduction is expected whenever you compress a video - that is how compression works. VidShift calculates the best bitrate for your chosen target size and video duration, so shorter clips keep more detail. To get the best balance of size and quality, pick the largest preset that fits your needs and consider lowering the resolution one step rather than accepting a very low bitrate. All processing happens on your device, so you can try multiple settings quickly.
It depends on your device and the video's length and resolution. Short clips typically compress in seconds; longer or higher-resolution videos may take a few minutes. A progress bar and estimated time remaining are shown throughout. Because VidShift runs entirely in your browser using WebAssembly, performance scales with your hardware - modern laptops and desktops handle most files quickly, and hardware acceleration is used when available.
Yes. Your video never leaves your device. VidShift has no backend servers that receive or store your files. All compression runs locally in your browser using WebAssembly, ensuring complete privacy. The tool even works offline after your first visit.
VidShift supports all common video formats: MP4, MOV, MKV, WebM, OGV, M4V, and MPEG-TS. The compressed output is always saved as MP4 for maximum compatibility across devices and platforms.
Yes. VidShift works in any modern mobile browser - Chrome, Safari, Edge or Firefox. Open this page in your mobile browser, select your video and choose a target size. The compression runs on your phone's processor and your video file isn’t uploaded or processed on our servers. For large or high-resolution files, a recent phone will give the best experience.
Completely free, with no hidden limits. There is no file size cap, no watermark, no daily quota and no account required. VidShift processes your videos directly in your browser, so your files are never uploaded and we don't pay for server-side media processing or storage. This keeps our costs low and lets us offer the tool for free. You can compress as many videos as you like.
Trim your video first with our Video Trimmer
Extract audio only with our MP4 to MP3 Converter
Remove audio before compressing with our Mute Video tool
Grab a still image with our Frame Extractor