YouTube Thumbnail & Title Checker
Upload your thumbnail and paste your planned title. Get a score /100, recommendations, up to 5 improved titles and up to 5 thumbnail text ideas — in seconds.
3 free analyses per day · No signup required · Signed out, your image is never stored
Tested before we asked you to trust it
On 321 pairs of real videos, each pair from one channel, the score ranked the video that beat its channel's baseline higher in 59.5% of pairs (95% confidence interval 53.9% to 64.9%). A modest effect, measured against a plan fixed before the test.
Frequently Asked Questions
- How does the YouTube thumbnail checker work?
- You upload your thumbnail image and enter your planned title. Our AI analyzes the visual impact, text readability, emotional appeal, and title strength — then returns a score out of 100 along with actionable recommendations.
- Is ThumbSignal free to use?
- Yes — you get 3 free analyses per day with no account required. A free account gives you 15 a month, at most 5 in one day, and keeps your history.
- What makes a good YouTube thumbnail?
- One a viewer can take in at a glance: one focal point, text short and heavy enough to read even when the thumbnail is shrunk to 168 pixels wide, and a thumbnail and title that each say something the other does not, with a promise the video keeps. Those are the readability, coherence and promise clarity factors of the score; the worked examples show two thumbnails scored before and after a fix.
- Does ThumbSignal store my image?
- Only if you are signed in. Your thumbnail is sent to our AI for analysis; signed out, the image is not kept — only the AI's written analysis is cached, for up to 90 days and without your IP address or account. When signed in, a small preview image (about 200 px wide), your score, and your title are saved to your private history and deleted after 30 days.