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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.
Choose a clip with the "Video file" picker (any format your browser can play; the file is decoded locally and never uploaded), then set "Frame selection" to Evenly spaced, Fixed interval or Single frame.
Fill the matching field — "How many thumbnails" up to 120, "Seconds between frames", or "Timecode (HH:MM:SS)" — choose a "Thumbnail width" from 320 to 1920 px and an Image format of JPEG, PNG or WebP, then press "Extract thumbnails".
Each still is named like clip-001-00-00-20-000.jpg and has its own download link; "Download all as ZIP" saves the batch as clip-thumbnails.zip, and "Copy timestamps" copies the frame times.
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.