ThumbGen
ThumbGen is a web tool for creating YouTube thumbnails from a written prompt, with optional reference images.
What ThumbGen is
ThumbGen is a web tool for creating YouTube thumbnails from a written prompt, with optional reference images. It offers FAST 1K images and PRO output at 2K or 4K, formatted for YouTube’s 16:9 aspect ratio. Users can upload up to eight reference images, and each one uses a credit. The service can create multiple thumbnail variations at once; its site says most generations take 10–30 seconds, depending on complexity and resolution. FAST 1K costs eight credits per image, while PRO output costs 30 credits at 2K or 55 credits at 4K. Credits reset each billing cycle and unused credits do not roll over. Subscribers can cancel at any time, with access continuing through the billing period, but payments and unused credits are nonrefundable unless required by law. ThumbGen offers Google sign-in and directs users to a contact form for support and privacy requests.
Good
- Creates thumbnails from prompts and reference images.
- Offers output up to 4K.
- Can create multiple variations at once.
- Free plan includes 150 credits.
Watch out
- Reference images cost one credit each.
- Unused credits do not roll over.
- Subscription payments and unused credits are nonrefundable, except where law requires.
Who it suits
ThumbGen suits people who need YouTube thumbnails from prompts and want to guide the output with reference images. It offers both a free plan and paid monthly plans.
Verdict
ThumbGen offers prompt-based thumbnail generation with several resolution and credit options. Check the per-image credit cost and rollover terms when choosing a plan.
Plans and prices
From ThumbGen's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | 150 credits · up to 18 thumbnails · up to 4K · reference images · $0 one-time |
| Starter | $9.99 a month | 1,000 credits/month · up to 125 thumbnails/month · up to 4K · reference images · priority generation · $9.99 per month |
| Creator | $24.99 a month | 2,700 credits/month · up to 337 thumbnails/month · up to 4K · reference images · priority generation · $24.99 per month |
The facts
Each one read from ThumbGen's own pages, with the date it was checked.
What it does
- Batch generation
- The site says users can create multiple thumbnail variations at once.checked 4 Oct 2026
- Cancellation and refunds
- Subscriptions can be canceled anytime with access through the billing period; subscription payments and unused credits are nonrefundable unless required by law.checked 4 Oct 2026
- Credit expiry
- Credits reset each billing cycle, and unused credits do not roll over.checked 4 Oct 2026
- Data deletion
- The privacy policy says users can request data access or deletion by contacting ThumbGen.checked 4 Oct 2026
- Generation time
- The site says most thumbnails generate in 10–30 seconds, depending on complexity and resolution.checked 4 Oct 2026
- Image resolutions
- It offers FAST 1K output and PRO 2K or 4K output, with images optimized for YouTube’s 16:9 aspect ratio.checked 4 Oct 2026
- Integration
- The sign-in page offers Google sign-in.checked 4 Oct 2026
- Privacy and data
- The privacy policy says it collects account details, billing information handled by its payment processor, usage data, and support messages; it shares data with service providers for hosting, analytics, and payments.checked 4 Oct 2026
- Purpose
- ThumbGen generates AI-powered YouTube thumbnails from a written prompt and optional reference images.checked 4 Oct 2026
- Reference images
- Users can upload up to 8 reference images, and each reference image costs 1 credit.checked 4 Oct 2026
- Security and compliance
- The privacy policy says service providers process data on ThumbGen’s behalf under appropriate safeguards; it does not name a security certification or compliance standard.checked 4 Oct 2026
- Support
- The site directs users to a contact form for support and privacy requests.checked 4 Oct 2026
Money
- Credit costs
- FAST 1K costs 8 credits per image; PRO costs 30 credits at 2K or 55 credits at 4K.checked 4 Oct 2026
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