Use the free Video Thumbnail Strip Maker below: get 6 still frames from across any video, each as its own JPG or PNG download. Your file never leaves your device.
What a thumbnail strip shows you
A thumbnail strip is a row of still pictures taken from one video, spread out from the start to the end. This tool takes 6 frames at even points across your video and shows them together, so you can see the whole video at a glance without watching it from start to finish. Each frame comes with its own time stamp, and each one downloads on its own as a JPG or PNG file.
That is different from scrubbing through a timeline, which shows one moment at a time. A strip puts the beginning, the middle and the end side by side, so a dull stretch, a sudden scene change, or a great shot near the end becomes visible in seconds.
How to use the strip maker
First, choose a video file from your device. MP4 and WebM work in most browsers, and MOV works if your browser can play it. The tool shows the video length and size, then the button becomes active. Press it and wait a few seconds while the tool grabs each frame.
The 6 frames appear in a grid, in time order, each labelled with its time. Frame 1 sits near the start and frame 6 near the end. Under each frame are two download links: JPG for a small, easy-to-share file, and PNG for a sharper file. Press the download-all button and the 6 JPGs download one after another.
Everything happens in your browser. Your video is never uploaded to a server or stored anywhere. There is no account to create and no queue to wait in.
Worked example: a 6-second test video
To check the tool, I ran a plain 6-second test video through it, 320 pixels wide and 180 tall. The tool read the length as 6.0 seconds and then captured 6 frames. The frame times were 0.5, 1.5, 2.5, 3.5, 4.5 and 5.5 seconds. Those are the middle points of six equal slices of the video, so no frame comes from the very first or very last instant, where a video is often black or faded.
Each frame downloaded as its own file, named after the video with the frame number added, for example fixture-frame1.jpg through fixture-frame6.jpg. The JPGs came out at about 8.5 to 8.9 kilobytes each. All 6 frames were visibly different, which confirmed the tool really stepped through the video instead of copying one frame six times.
The same test shows what the strip is for. Even with a short clip, the six pictures together told the story of the whole clip faster than playing it. With a two-minute walkthrough, the same six pictures would show the opening shot, the middle scenes and the ending in one view.
Good uses for a frame strip
Creators use strips to pick a cover image. Instead of guessing which second looks best, they look at six candidates and download the strongest one. Teachers use strips to check a recording quickly: six frames show whether the slides changed and whether the ending was recorded at all.
Video editors use strips to find a scene. If the good take is somewhere in the middle, the strip narrows it to one slice of the video before anyone scrubs frame by frame. Families use strips the same way, to check a long phone video before sending it: the strip shows whether the candles, the goal, or the first steps actually made it into the clip.
Strips also work as simple contact sheets: six frames in a document give a one-page summary of a video for someone who will not watch it.
Honest limitations
Frame times are evenly spaced, not chosen by content. The tool does not detect scene changes or the best-looking shot. It gives six honest samples across the video, and picking the best one is still your job. If your video is very short, the six frames will look almost identical, because there is little change between them.
Seeking in a browser is also approximate on some videos. A browser often lands on the nearest keyframe rather than the exact second you asked for, so a frame may sit a fraction of a second away from its label. For picking a cover image, that gap does not matter. For exact frame work, use a desktop editor instead.
Frames keep the video's own width, up to 1280 pixels. The tool can only read videos your browser can play. A damaged file, or an unsupported format, will not load, and the tool will say so rather than produce blank frames.
Frequently asked questions
Does my video get uploaded anywhere?
No. The video stays on your device and the frames are drawn in your browser. Nothing is sent to a server, and closing the page removes everything.
Why 6 frames, and can I change the number?
Six frames cover a video well without flooding the page. The number is fixed at six, so the strip stays simple and fast.
Which format should I download, JPG or PNG?
JPG for sharing and documents, because the files are much smaller. PNG when you plan to edit the frame, because it keeps every pixel sharp.
Why does a frame look slightly different from the exact second shown?
Browsers seek to the nearest keyframe on some videos, so the picture can sit a fraction of a second away from the label.
Spanish version: Tira de Miniaturas de Video Online.
Want one designed cover image instead of six frames? Try the Video Thumbnail Maker.