Pick the stronger thumbnail variant.

Compare two YouTube thumbnail images for free. Review brightness, contrast, face, color, and readability scores.

Compare two thumbnails using technical image checks such as brightness, contrast, face, color, and readability. The result is a technical comparison, not a measurement or prediction of CTR or actual viewer preference.

Use it as one input when reviewing two cover options.

How to use

  1. Select video or Shorts, then upload the two images you want to compare.
  2. Hit the compare button.
  3. Review the brightness, contrast, face, color, and readability scores.
  4. Review the technical scores and suggested comparison; they do not predict which thumbnail will get more clicks.
  5. Use the technical comparison as one input, then choose with your video and audience in mind.

How to use the result

Compares measurements from the two supplied images. The comparison does not estimate CTR.

  1. Compare both covers at the same display size.
  2. Check the selected format for both images.
  3. Use impression and click counts for a measured comparison.

Frequently Asked Questions

What does free thumbnail A/B compare?

The free version compares 7 technical image signals: brightness, contrast, saturation, face count, resolution, aspect ratio, and a text-density proxy. It does not measure or predict CTR, and it does not call a vision model.

Does the comparison predict which thumbnail will perform better?

No. It compares technical image features, not real viewer response or CTR. Use the scores as one input when reviewing the two thumbnails.