Video Cover Generator Online — Create a Thumbnail
Create a video thumbnail online from a selected frame, crop it to a common aspect ratio and add an optional title locally.
Files are processed locally in your browser and are not uploaded.
About this tool
The cover generator turns a chosen video moment into a ready-to-use thumbnail. It can center-crop the frame for landscape, square, portrait or classic presentation ratios and overlay a readable title before export.
How to use
- Choose a supported local file or enter the required values.
- Review the available settings and run the tool.
- Check the result, then download or copy it before closing the page.
Features
- 16:9, 1:1, 9:16, 4:3 and source-ratio layouts.
- Optional centered title overlay.
- JPG or PNG download generated in the browser.
Common use cases
- Create a YouTube-style landscape cover.
- Prepare a square social-media preview.
- Make a vertical cover for short-form video.
Common issues and tips
- Center cropping can remove subjects close to the frame edges.
- Long titles are scaled but may still feel crowded on portrait covers.
Privacy
Your video, image or subtitle data is processed locally in your browser and is not uploaded to Tools12345.
Frequently asked questions
Can I keep the original aspect ratio?
Yes. Select the source-ratio option.
Is the title required?
No. Leave it empty to export only the selected frame.
Does it upload the video?
No, frame selection and cover rendering happen locally.