AI Poster Generator Make a poster from text — artwork and typography together

Here is something we found out by testing rather than by guessing, and it explains most of the disappointing results people get from AI poster tools.

If you hand an image model your poster copy the way you would hand it to a designer — headline, subheading, body line, "make it a poster" — what comes back is usually a cream rectangle with your words set on it in a competent sans-serif. The spelling is perfect. There is no artwork. It is a text slide, and it is technically exactly what you asked for: you described words, so you got words. We ran that experiment three times and got the same thing three times.

The fix is not a better model, it is a better instruction — and it is the half of the instruction that a person who wants a poster does not know to write. A poster needs to be asked for as a printed object: a composition, an illustration filling the frame, colour blocking, type integrated into the artwork rather than sitting on it. When we wrapped the identical copy in that framing, the same model on the same tier returned finished screen-printed, mid-century, vintage-travel and Swiss pieces, four out of four, with every line of type correct.

That scaffold is what the style buttons on this page are. You write the words; the style supplies the composition language. It is also why the results here look different from typing the same sentence into a general image tool — not because the model is different, but because the request is.

The practical rule that falls out of the same testing: three lines. A headline of two to four words, one supporting line, one line of details. Push past that and the type shrinks to fit, crowding rises and mistakes start to appear. A poster is read from across a room, so the constraint is a design truth as much as a model limitation — but it is a hard limit here either way.

Both comparisons show up in the related searches for this term, so both deserve an answer rather than a shrug.

Canva is the incumbent and it is genuinely good at this. Templates, your own photos, your brand font, your exact hex, precise control over every element — and you do the layout. That is the right tool when the poster has to match a brand, include a specific image, or be edited again next month. It is a slow tool when you have three lines of copy, no photo, no brand kit, and an event on Friday.

ChatGPT will make you a poster image and, in our experience, will make you a text slide for exactly the reason described above unless you already know how to ask. You can get there — describe the composition, the palette, the illustration style, the placement of each line — but at that point you are writing the scaffold by hand every single time, and you still have no repeatable style you can pick again next week.

This page is the narrow one. Six styles, three lines of copy, fifteen seconds, six free runs, portrait output ready to print. What it will not do is put your photo in the design, match a brand font, or hit an exact colour — all three are real limitations rather than things we are being modest about. If any of those matter, generate the artwork here and finish it in a design tool, or work on the Images surface where reference images and stronger models are available.