Feature
Turn your video into a thumbnail that matches it
Paste a YouTube link and import the transcript. The agent reads what the video actually says, finds the moment worth clicking for and builds the thumbnail around it.
Why start from the transcript
The best thumbnail promises something the video delivers. When you describe a video from memory, the strongest hook is often buried — a surprising result at minute eight, a number, a moment of conflict.
Importing the transcript gives the agent the full picture. It can pull out the most clickable idea, suggest short thumbnail text, and propose a design that sets up the payoff without spoiling it.
How it works
- 1
Paste the YouTube link
Import the transcript of any public video from the project’s side panel — your upload, a draft you’ve published as unlisted, or a video you’re responding to.
- 2
Send it with one message
Tick “Transcript” under the chat box. It’s sent with that message only, so long transcripts don’t keep using credits.
- 3
Ask for hooks and text
Ask for thumbnail text options or the strongest angle. You get 5–10 short options with the agent’s pick.
- 4
Generate the thumbnail
Approve the direction you like and the agent proposes the image.
Frequently asked questions
Which videos can I import?
Public and unlisted YouTube videos that have captions or auto-generated transcripts.
Is transcript import included in every plan?
It’s available on subscription plans. The import uses a small amount of credits based on its real cost.
Will it write my YouTube title too?
ThumbSpark focuses on the image and the short text on it. The thumbnail text is designed to work alongside your title, not repeat it.
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
Thumbnail text ideas
Get 5–10 short, punchy text options for your thumbnail — never a wall of words.
Learn more →AI thumbnail generator
Describe your video in plain words and get a ready-to-upload YouTube thumbnail.
Learn more →Thumbnail text tips
How to write 2–5 words that add curiosity instead of clutter.
Learn more →