Free tool · no sign-up · runs in your browser
Video to Thumbnail
Open a video from your device, scrub or step to the frame you want, and save it as a JPG or PNG thumbnail at 1280×720, 1920×1080 or the video's own size. Frames that aren't 16:9 can be cropped to fill or padded with black bars, and "Pick 6 frames" grabs evenly spaced frames to choose from. The video is played and captured in your browser; it is never uploaded.
How to use it
- Step 1Open your videoDrop in an MP4, WebM or MOV file. It plays from your device; nothing is uploaded.
- Step 2Find the frameScrub with the slider, step one frame (about 1/30 s) or one second at a time, or click "Pick 6 frames" to grab evenly spaced frames.
- Step 3Capture and exportCapture the frame, choose 1280×720, 1920×1080 or the original size, JPG or PNG, and download it. Or send it to the Thumbnail Tester to preview it with your title.
Turn your thumbnail idea into a short video
Animate the frame you picked with Kensa's Image to Video, or describe a new scene for Text to Video, to make a teaser, a Short or an intro. Video generation uses credits; each clip takes a few minutes.
Frequently asked questions
Is my video uploaded?
No. The video is opened from your device and played in your browser. Frames are captured and exported with your browser's own canvas, so nothing is sent to Kensa or anyone else. Closing the page clears everything.
Which video formats work?
Any format your browser can play. MP4 with H.264 video and WebM work in all major browsers. Some MOV files recorded as HEVC (common on iPhones) only play in Safari; if a file won't open, convert it to MP4 first.
What size will my thumbnail be?
You choose: 1280×720, 1920×1080 or the video's own size. If the video isn't 16:9 (a vertical phone video, for example), pick crop to fill or black bars. Exporting larger than the video's resolution doesn't add detail.
Is frame stepping exact?
Close, but not guaranteed. The step buttons move about 1/30 of a second, and browsers land on the nearest frame they can decode, which can differ slightly between browsers. Capture a few nearby frames and keep the sharpest.
Can I add text to the thumbnail?
Not in this tool. Export the frame, add text in your image editor, then check the result in the YouTube Thumbnail Tester.
Is it free?
Yes. There is no sign-up, no watermark and no limit on how many frames you capture.