Free social media tools

Preview posts, count characters, write captions with AI, and create threads — all free, no signup required.

Tools tagged “thumbnail”

Check if your images meet YouTube's size requirements.

Check if your image meets the TikTok thumbnail size requirement (1080x1920).

Drop in one picture and get every YouTube size back, cropped to fit.

Grab the thumbnail from any YouTube video in every available resolution, up to 1280x720.

See your thumbnail at the sizes viewers actually meet it: the 360px search result, the 168px sidebar and the mobile feed.