Free tool
Free Instagram Reels Thumbnail Maker with AI
Describe it, pick a style, get a Reels cover in seconds.
One free thumbnail a day. Sign up free to generate from your actual video, without a watermark, with variants.
How to use it
Describe it
Type what the cover should show and the aesthetic you want.
Pick a style
Choose the look that fits your feed.
Generate
Get a 1080×1920 cover in seconds. Sign up free to remove the watermark and make covers from your Reel.
Covers that keep your grid consistent
A Reel's cover is what sits on your profile grid forever, so it shapes how your whole feed looks and whether people tap. This makes a 1080×1920 cover from a description with the same AI behind Thumbn's studio.
No design app, no template hunting. Describe it, choose a style, and go.
Free to try, powerful when you sign up
One free cover a day, watermarked, so you can judge the quality.
Create a free account to generate covers from your actual Reels with no watermark, multiple concepts, and chat-based refinement.
Frequently asked questions
- Is the Reels cover maker free?
- Yes — one watermarked cover a day with no account, unlimited and watermark-free when you sign up free.
- What size are Reels covers?
- Vertical 1080×1920 (9:16), which matches Instagram Reels.
- Do I need design skills?
- No. Describe the cover and pick a style — the AI does the rest.
- Can it use my Reel?
- Sign up free and the studio builds covers from your uploaded Reel or link.
- Why the watermark?
- The free preview is watermarked; a free account removes it.
Need the thumbnail, not just the tool?
Thumbn watches your video, finds the frame worth using, writes the concept and renders it at every platform size — then grades its own work and redoes it until it clears the bar.