Video Thumbnail Extractor
One-click keyframe extraction from videos to generate high-quality thumbnails — customize count, format, and size
Smart Extraction
Automatically extracts evenly distributed keyframes to generate representative thumbnails
Flexible Customization
Customize the number of thumbnails, image format, and output size
Local processing, privacy-safe
Everything is processed locally in your browser — videos are never uploaded to a server
Drag and drop video files here
or
Supports MP4, WebM, MOV, MKV, AVI, and more
Why extract video thumbnails?
Video Cover Creation
Quickly generate multiple cover candidates and pick the most eye-catching frame as your video cover
Quick Preview
Batch-extract thumbnails to quickly understand video content without having to play it
Asset Collection
Pull key frames from long videos to use as design or creative assets
Video Index
Build a visual index of your video content for quickly locating specific scenes
Use Cases
- Content creators: design eye-catching covers for your videos to boost click-through rates
- Educators: extract key frames from lessons to build course indexes and outlines
- Designers: pull assets from videos for design and creative work
- Individuals: organize your video footage and quickly preview content
How to Use
- 1Upload a video file or drag it into the upload area
- 2Set the number of thumbnails, image format, and output size
- 3Click "Extract Thumbnails" and wait for processing to complete
- 4Preview the images, pick the ones you need, then download or copy them to the clipboard
Frequently Asked Questions
How many thumbnails can I extract?
You can extract 1-20 thumbnails. The system automatically distributes keyframe extraction evenly throughout the video so the entire content is covered.
Which image formats are supported?
PNG, JPEG, and WebP are supported. PNG is best for transparent backgrounds or lossless quality; JPEG produces smaller files for easy sharing; WebP strikes the best balance between quality and size.
Can I customize the output size?
Yes. You can choose presets like original size, 1080p, 720p, 480p, or set a custom width and height — the system will automatically preserve the aspect ratio.
How long does extraction take?
Processing speed depends on video size, length, and the number of thumbnails. Extracting 10 thumbnails from a 1-2 minute video typically takes just a few seconds. Everything runs locally — fast and secure.
How do I download the extracted thumbnails?
Once extraction is done, you can download each image individually or select multiple and batch-download them as a ZIP file. You can also copy images to the clipboard in one click for instant pasting.
Will my video file be uploaded to a server?
No. Everything runs locally in your browser using WebCodecs API technology. Your video files never leave your device, keeping your privacy fully protected.