ThumbForge is a focused Windows app that turns a clip into a looping micro-preview — the kind of hover-thumbnail that pulls a click. Drag in a video, pick a length, export to GIF, WebP, MP4, WebM, or APNG. No cloud round-trip, no watermark, no nonsense.
Single seat. One year of free updates. Email support from the maker.
Try the live demo first ↓Per output. Dial it in for the loop length you need — short and snappy, or long enough to tell a story.
Every format ships with sensible encoder presets and a 'tune-it-yourself' advanced panel.
Frame seeking runs on a custom decoder pipeline. A 4K source loops in under a second on most machines.
This is the actual extraction + loop pipeline that ships in the desktop app, recompiled to run on this page. Drop a clip in — nothing leaves your machine.
Auto-skip black frames, repeated content, and credits. Pick by even intervals, by motion peaks, or by your own keyframes — whatever serves the loop.
Export the same source as 16:9 for YouTube, 1:1 for socials, 9:16 for shorts — in one pass, with a per-aspect crop frame you place once.
Five presets per format, tuned for the platforms creators actually ship to. Override anything — quality, palette size, dithering — without leaving the panel.
Point ThumbForge at a folder; it watches for new clips and renders the loop on save. The faster path between 'shot it' and 'thumbnail uploaded'.
No accounts, no upload, no telemetry. Your footage stays on your disk. The license is keyed to your email, not your machine.
thumbforge in.mp4 --frames 8 --out loop.webp — drop the same engine into your CI pipeline. Included with every license.
Pay once. Use it on as many of your own machines as you like. Get a year of updates included. After that, optional paid upgrades — never required, never nagged.