Video Thumbnail Generator
Extract frames from any video. Single thumbnail or grid for previews.
100% private
Videos never leave your browser
PNG / JPG
High-quality output
Grid mode
Multiple frames at once
Thumbnail Settings
Drop video here
or click to browse
The thumbnail generator decodes your video in the browser and extracts still frames at the timestamps you specify. You can pull a single thumbnail at a given second, or generate a grid of evenly-spaced stills to use as a preview strip. Outputs are PNG by default, so there is no quality loss beyond what the video codec itself introduces.
Common use cases include generating poster images for a website, building preview galleries for a CMS, creating cover art for a podcast video, or extracting a key frame for a social media post. Because every frame is decoded locally, thumbnails can be produced at full source resolution — no platform-imposed downscaling.
Your video is not uploaded. Decoding happens via the browser's video element plus WebCodecs, and the thumbnails are rendered to a canvas that stays on your device until you download them.
Video Thumbnail Generator — Frequently Asked Questions
How do I get a thumbnail from a video?
Drop your clip, scrub to the timestamp you want (or type it in the input), and Capture. The frame is extracted at the video's native resolution and saved as a PNG. For multiple thumbnails, switch to Grid mode and pick how many you want across the clip.
Can I generate multiple thumbnails at once?
Yes. Pick the grid layout (4, 8, 16 thumbnails) and the tool extracts evenly-spaced stills across the full duration. Great for building a preview strip for a video player or a contact sheet for archival.
What resolution are the thumbnails?
Each thumbnail is extracted at the video's native resolution — no platform-imposed downscaling. If your source is 4K, your thumbnails are 4K. Use the image resizer afterwards if you need smaller previews.
What image format are thumbnails saved in?
PNG by default, so there's no lossy re-encoding. Switch to JPG for smaller files (useful when you're generating a grid and want each thumbnail under a kilobyte).
What video formats does the thumbnail generator support?
Any format your browser can decode — MP4, WebM, MOV, and MKV are all well supported. AV1 in modern Chrome/Firefox, HEVC where hardware decode is available. Drag-and-drop to try.
Does the video get uploaded somewhere?
No. Decoding and thumbnail extraction run entirely in your browser. The video file never leaves your device.
How do I get a thumbnail from a video?
Drop your clip, scrub to the timestamp you want (or type it in the input), and Capture. The frame is extracted at the video's native resolution and saved as a PNG. For multiple thumbnails, switch to Grid mode and pick how many you want across the clip.
Can I generate multiple thumbnails at once?
Yes. Pick the grid layout (4, 8, 16 thumbnails) and the tool extracts evenly-spaced stills across the full duration. Great for building a preview strip for a video player or a contact sheet for archival.
What resolution are the thumbnails?
Each thumbnail is extracted at the video's native resolution — no platform-imposed downscaling. If your source is 4K, your thumbnails are 4K. Use the image resizer afterwards if you need smaller previews.
What image format are thumbnails saved in?
PNG by default, so there's no lossy re-encoding. Switch to JPG for smaller files (useful when you're generating a grid and want each thumbnail under a kilobyte).
What video formats does the thumbnail generator support?
Any format your browser can decode — MP4, WebM, MOV, and MKV are all well supported. AV1 in modern Chrome/Firefox, HEVC where hardware decode is available. Drag-and-drop to try.
Does the video get uploaded somewhere?
No. Decoding and thumbnail extraction run entirely in your browser. The video file never leaves your device.