Feature
Edit any thumbnail just by asking
No layers, masks or design software. Drag a thumbnail into the chat, say what to change, and ThumbSpark creates a new version with only that part changed.
Edits that keep what already works
When you ask for a change, the current thumbnail is sent as the starting point, so only the part you mention changes. Your layout, character and colours stay put.
Every edit is saved as a new variation next to the original. Compare versions, keep the best one, and never worry about overwriting a design you liked.
Things you can ask for
- “Make the text bigger and move it to the left.”
- “Swap the background for a night-time city.”
- “Change my expression to excited.”
- “Add our logo small in the top-right corner.”
- “Use the colours from this reference instead.”
- “Make a version without any text for A/B testing.”
Tip: Making variations for an A/B test? Change one thing at a time — the text, the face or the background — so you know what made the difference. See how to A/B test thumbnails.
Bring your own images
Add logos, product shots or backgrounds to a reference library and mention them by name — “place @logo_white in the corner”. The image is sent to the model with your request.
Frequently asked questions
Does editing replace my original thumbnail?
No. Each edit creates a new version and the original stays in your project.
Does an edit cost the same as a new thumbnail?
Edits use credits like any generation, based on the model’s real cost. See pricing.
Can I edit a thumbnail I made somewhere else?
Yes — upload it to a project and ask for the change you want.
Make your next thumbnail in minutes
Tell the AI agent what your video is about — it proposes a thumbnail, you approve it, and you can tweak it by asking.
Keep exploring
AI thumbnail generator
Describe your video in plain words and get a ready-to-upload YouTube thumbnail.
Learn more →A/B test thumbnails
How to run thumbnail tests that teach you something — with YouTube’s Test & compare.
Learn more →Reference library
Keep logos, products and backgrounds in buckets and @mention them in any project.
Learn more →