A good event poster answers three questions at a glance: what is happening, when and where, and why someone should come. If a passerby cannot answer those three in a few seconds, the poster is not doing its job. This guide shows how to design a poster with Thumbero’s Poster Generator, a free tool that draws your title, subtitle, and date or venue line on a portrait canvas in your browser and lets you download it as a PNG.
What the Poster Generator is for
The tool builds a portrait poster from your own words. You type a title, a subtitle, and a detail line for the date or venue, pick a size, a color style, and a font, and optionally add a photo behind the text. The result is a finished poster image you can print, share on social media, or put on a notice board. It does not generate a photograph from a sentence, and it does not use an AI image service. Everything it draws comes from the text and choices you enter.
Who should use it
It suits organizers of concerts, fairs, workshops, and school events, small shops announcing a sale or a launch, clubs and teams promoting a match or a meetup, and anyone who needs a tidy poster without hiring a designer or learning a design program.
How it works, step by step
- Open the Poster Generator.
- Type your poster title. Short titles work best, ideally two to five words, because the title is the largest text on the poster.
- Write a subtitle that says what the event is in one line, for example what kind of music, food, or activity visitors can expect.
- Put the date and venue in the detail line, so nobody has to guess when or where to show up.
- Pick a size. Use 1080 x 1350 for a social post, 1080 x 1920 for a story or a phone screen, or 1200 x 1800 for a printed poster shape.
- Choose a style and colors, and add a photo if you have one. Raise the darken slider until the title reads clearly over the photo.
- When the preview looks right, click Download poster as PNG and save the file.
Practical tips
- Give the date and venue the same care as the title. A beautiful poster that hides the details will not fill seats.
- Use one photo, not a collage. A single clear image behind the title looks calmer and more professional.
- Leave empty space around the title. Crowded posters are harder to read from a distance.
- Check the poster at phone size before you share it, since most people will first see it on a small screen.
- If you also need a wide image for a video, make a matching one with the Thumbnail Generator using the same title and colors.
Honest limits
The tool draws text and shapes only. It cannot create a photo, design a logo, or lay out a multi-page flyer. For a photo with a plain background removed for use on the poster, try the Background Remover. Your title, photo, and choices stay in your browser and are not uploaded to Thumbero.