Fitness Thumbnail Maker

1280 x 720 pixels, 16:9, under 2MB, in JPG, PNG, GIF or WEBP. That is the same for every niche. Design at that size from the first click rather than resizing at the end, because resizing a finished design moves text you placed carefully.

More important than people expect. Even in a category about bodies, a visible face with a readable expression lifts click-through, because it gives the viewer someone to identify with rather than a physique to measure themselves against.

Strong contrast between subject and ground. Keep text off the body, because the subject is the message and text laid across a torso competes with the thing the viewer is assessing.

Use your own footage. Stock transformation imagery is heavily reused across fitness channels and audiences recognise it immediately, which undermines the claim you are making at exactly the moment you need to be believed. It also creates a compliance risk, because implying a result you did not produce falls under misleading content rules.

Yes, and this catches channels out. YouTube's advertiser-friendly guidelines treat content focused on the body in a sexually suggestive way as limited or no ads, and the thumbnail is part of what gets assessed. Show the movement and the effort rather than framing for the body itself.

Three to five at most. The thumbnail is seen at around 168 pixels wide on a phone, and longer text at that size becomes a grey smudge. If the words repeat what the image already shows, delete them and let the picture work.

The AI generators sit on the Pro plan, which includes 1,000 credits a month, and Magic Edit and erase draw on the same credits. The free plan is permanent rather than a trial and never asks for a card, and it covers outlier search and three tracked channels, so you can see what already worked in fitness before deciding whether to pay for the generator.

Feed in a reference image or a face and the generator holds your likeness and style across generations. Consistency matters most where the audience is subscribing to you rather than to the topic, which is true of most fitness channels.