Loading page
About this tool
Pull still frames out of a video at evenly spaced or fixed-interval timestamps and download them as images.
The Video Thumbnail Extractor pulls still frames out of a video file and saves them as JPEG, PNG or WebP images, without uploading anything. For evenly spaced thumbnails it cuts the clip into n+1 equal segments and takes a frame at each internal boundary — t = duration × (i+1)/(n+1) — which deliberately avoids the first frame, so common black or fade-in openings are skipped. It is for editors building contact sheets, marketers picking a cover image, and anyone who needs a still from a clip they already have.
Open Video Thumbnail Extractor on AltFTool — it loads instantly in your browser.
Upload or drag in the file you want to work with.
Adjust the settings and preview the result.
Download the finished file to your device.
Even spacing starts one segment in, so the black opening frame is not what you get.
Type HH:MM:SS, MM:SS or plain seconds for a start offset or single frame.
The video is decoded by your browser's own player; no file or frame is sent anywhere.
The clip is divided into one more segment than the number of thumbnails requested, and a frame is taken at each internal boundary. Four thumbnails from a 100-second clip come from 20 s, 40 s, 60 s and 80 s — never 0 s, which is usually black.
Whatever your browser can play, which in practice means MP4/H.264, WebM/VP9 and usually MP4/H.265 on Safari. Files the browser cannot decode, and any DRM-protected stream, cannot be drawn to a canvas and will report an error rather than a blank image.
Up to 120 in a single run. Each frame requires a seek, a decode and a canvas readback, so larger batches are slow and can exhaust the memory of a browser tab.
They are as wide as you choose, up to the source width — the tool never enlarges. The height always follows from the source aspect ratio, so a 1920 × 1080 video at 640 px wide gives 640 × 360 thumbnails.