AI Thumbnail Editor

A reference image tells an AI model what to keep. Upload a few photos of yourself and the editor can place you in a new scene with a new expression while keeping your likeness. Upload two or three of your past thumbnails and it can follow your channel's colours and framing.

Good references are sharp, well lit and varied in angle. One blurry selfie produces a blurry likeness, and a single past thumbnail makes the model copy it too literally.

Today you can add your own photo as the main subject or background in the free maker.

Background editing removes clutter behind the subject, extends a scene to fill 16:9, or replaces it entirely with something that supports the story: a stage for a reveal, a skyline for a city video, a dark gradient for a serious topic.

The goal is separation. A clean, darker or blurred background makes the subject and headline pop at small sizes, which is usually worth more than a detailed scene nobody can see.

Today the maker offers eleven background scenes and a darkening slider for photo backgrounds.

Thumbnail text needs weight, contrast and space. Heavy condensed typefaces fit more letters into less width, outlines and shadows separate text from busy images, and a second colour highlights the word that carries the hook.

Thumio renders text as real typography instead of asking an image model to draw letters, which keeps every word correctly spelled and razor sharp at any export size.

Available now in the maker: outlines, shadows, accent colours, auto-fit sizing and a size slider.

Variations answer the most useful question in packaging: what if we tried it another way? Changing only one element at a time, such as the layout, the palette or the subject, shows which change actually helps.

AI-generated variations will add new scenes and styles. Until then, every template can be restyled in one click.

Available now: swap layout, palette, scene, subject and mirroring instantly in the maker.

Useful feedback is specific: the headline is too long to read at sidebar size, the subject blends into the background, the duration badge covers the key detail. Thumio's planned feedback will describe issues like these in plain language.

We will not invent click-through predictions or scores that cannot be verified. Real performance data comes from your own YouTube Analytics and from testing.

Today the preview tool runs grayscale and squint tests and checks size, format and file weight.