24 stars · MIT · v4.0.0 (2026-05-14)
Tiny template-based desktop thumbnail composer — 1280x720 grids, signed Mac build, opens and closes in two minutes.
▶Repo detailsthe review · specs · pros & cons · install
What it is
A small desktop application that composes 1280×720 YouTube thumbnails from a grid of one to six images with text laid over them. Version 4, from May 2026, added a properly signed macOS build.
Why it matters
This is the cheapest item on the page and it touches the most important number on your channel. Thumbnail click-through decides whether YouTube shows a video to anyone who is not already subscribed — it outranks the title, the description and the tags combined. Right now every thumbnail you make is bespoke work in SnagIt, which is exactly why you make one per video instead of three. A template-driven composer makes the second and third variant nearly free, and that is the whole game: not a better thumbnail, but the habit of making three and keeping the one that earns clicks. Satori from Edition 1 is the programmatic version of this for when you want a hundred; this is the version you open on a Tuesday afternoon. Do not let the star count decide for you — a 24-star local image tool carries almost none of the risk a 24-star server would.
- Opens, does one job, closes. No install ceremony, no account, no subscription
- MIT, and v4.0.0 shipped in May 2026 with a signed Mac build — this is maintained, not abandoned
- Template-driven, so an English and a Russian variant of the same thumbnail take a minute each
- Twenty-four stars and one maintainer. If he stops, it stops — plan on it being a tool you use, not one you depend on
- Grid layouts only. It is not a design tool and will not replace SnagIt for anything elaborate
- Electron, so the download is heavier than a 24-star utility sounds like it should be
Right now every thumbnail you make is bespoke work in SnagIt, which is exactly why you make one per video instead of three.
Standalone desktop application on your Mac.
