Test your packaging before you publish.

Free tools for YouTube titles, thumbnails and CTR. Most run entirely in your browser — nothing is uploaded — and none need an account.

Paste a title, get a Clks Score out of 100 and the one thing helping or hurting it most.

In-browser

See where your title gets cut off on desktop, mobile and in the sidebar — before you publish.

In-browser

Work out impressions click-through rate, see how it compares, and what one extra point would be worth.

In-browser

See your thumbnail at real feed sizes next to your title, and check it against YouTube’s requirements.

In-browser

See what shows before “…more”, and check hashtags, links and chapter timestamps against YouTube’s rules.