FREE · PRIVATE · NO SIGNUP
Free online video compressor
Reduce video file size directly in your browser. Your video stays on your device and is never uploaded to our servers.
- 100% private, on-device processing
- No account required
- MP4 output
How to compress a video online
Compressing a video with Yuelu Tools takes four simple steps:
1. Click "Select Video" or drag your video file directly into the upload area. The tool accepts MP4, MOV, AVI, MKV, WebM, and FLV files.
2. Choose a quality preset. Medium balances file size and quality for most videos. Use High when preserving fine details matters most, or Low when you need the smallest possible file size or want to reduce resolution to 720p.
3. Click "Compress Video" and wait for processing to complete. The compression runs entirely on your device using your browser, so processing speed depends on your video length and computer performance.
4. Preview the compressed video to check quality, then click "Download" to save the MP4 file. The original file remains on your device and is never uploaded to any server.
Private, browser-based video compression
Yuelu Tools compresses your video directly on your device, without sending the source file to a remote conversion server. Private recordings and work files stay under your control.
The compressor converts the result to a broadly compatible MP4 file using H.264 video and AAC audio. Compression time depends on the video duration, resolution, and the speed of your device.
Choose the right quality level
Medium is the best starting point for most videos. High preserves more detail but produces a larger file, while Low reduces the resolution to 720p and favors a smaller result.
Video compression is a tradeoff between quality, file size, and processing time. Keep the original file until you have reviewed the compressed result.
Common video compression use cases
Compress video for email attachments: Email providers typically limit attachments to 25MB. Use the Low preset to achieve maximum compression while maintaining acceptable quality for most viewing scenarios.
Compress video for WhatsApp and messaging apps: The Medium preset produces files typically between 3-8MB per minute of video, perfect for quick sharing while preserving quality on mobile screens.
Reduce screen recording file size: Screen recordings often have unnecessarily high bitrates. The High preset preserves text readability while reducing file size by 60-70%, ideal for tutorial videos and bug reports.
Optimize videos for website hosting: Smaller video files improve page load speed and user experience. Use Medium for feature videos or Low for background videos where detail is less critical.
Supported video files
The compressor accepts MP4, MOV, AVI, MKV, WebM, and FLV input files. The downloaded result is an MP4 file designed for common browsers, messaging apps, and media players.
Frequently asked questions
Are my videos uploaded?
No. Compression runs in your browser, and the selected video remains on your device.
Which quality setting should I use?
Start with Medium. Choose High when detail matters most, or Low when reducing file size is the priority.
What format will I download?
The compressed download is an MP4 file using H.264 video and AAC audio for broad compatibility.
What video formats can I compress?
The video compressor supports MP4, MOV, AVI, MKV, WebM, FLV, and most common video formats. The output is always an MP4 file with H.264 video codec and AAC audio codec for maximum compatibility with browsers, phones, and media players.
How much can I reduce video file size?
Typical compression reduces file size by 50-70% while maintaining good visual quality. Results vary based on the original video codec, bitrate, and the quality preset you choose. The Medium preset balances file size and quality for most use cases.
Does video compression reduce quality?
Yes, compression involves some quality loss, but the Medium and High presets preserve visual quality well for most videos. The compressor uses efficient H.264 encoding to minimize quality loss while significantly reducing file size. Always keep your original file until you review the compressed result.
How long does video compression take?
Compression time depends on video duration, resolution, and your device speed. A typical 2-minute 1080p video takes 1-3 minutes on a modern laptop. Longer videos or 4K resolution will take proportionally longer. All processing happens on your device.
Can I compress 4K videos?
Yes, but 4K video compression requires more memory and processing time. For very large 4K files, your browser may run out of memory. Consider using the Low preset to reduce resolution to 1080p for better compatibility and smaller file size.
What is the best compression setting for WhatsApp?
Use the Medium preset for WhatsApp videos. This produces MP4 files typically under 15MB that maintain good quality on mobile screens. WhatsApp accepts H.264/AAC MP4 format, which is exactly what this compressor outputs.
What is the best compression setting for email?
Use the Low or Medium preset for email attachments. Most email providers limit attachments to 25MB. The Low preset reduces resolution to 720p and uses higher compression, making files small enough for email while remaining watchable.