AI Alt Text Generator

Alt text exists for the person who cannot see the image: a screen reader reaches the picture and reads your sentence out loud instead. That single job settles most of the questions people argue about. Do not begin with "image of" or "photo of" — the screen reader has already announced that it is an image, so those three words are a tax on every listener. Describe what is shown, in one plain sentence, in the order that matters: the subject first, then what it is doing, then only the context that changes the meaning. Keep it short — roughly a sentence, and under about 125 characters, which is where several screen readers break the text up anyway. Do not stuff it with keywords; search engines have read alt attributes for two decades and treat a keyword list as exactly what it is. Two special cases are worth knowing: an image that is purely decorative should have an empty alt (alt="") so the reader skips it entirely, and an image that carries real information — a chart, a diagram, a screenshot with text in it — needs more than a sentence, which is what the Long description mode here is for. The same sentence does double duty for search: it is the only text a crawler has for the image itself, which is why alt text and image metadata are the two things worth getting right before you publish.

Pick the mode that matches the job, because the mode is the instruction the model is given. Alt text asks for one plain sentence for a screen reader. Long description asks for the subject, the setting, the colours and the action — use it for charts, diagrams, screenshots and product shots, where the image carries information the page text does not. Caption asks for the line a person would actually post with the photo. What a vision model sees is what is visible: it will describe two people at a table, but it does not know they are your co-founders, and it cannot read a name that is not in the frame. So treat the output as a first draft — correct the names, drop a detail that does not matter, and it is done in seconds instead of minutes. Where it earns its keep is volume: a product catalogue, an image-heavy archive, a blog with two hundred old posts whose images have no alt at all. Run each image, keep the sentence, move on. If you are working through a batch, the Image Compressor and the Image Resizer handle the other half of publishing an image well. Every run here is free to preview; credits only unlock the full text, and the pricing page shows what a credit costs.