Ad specs / ChatGPT
ChatGPT ad size
A ChatGPT ad image is square, 1:1, a PNG or JPG no larger than 1200 × 1200 pixels when you upload in bulk; through the ads API it takes JPEG, PNG or WebP of at least 640 × 640. The title should be 16–24 characters, 50 at most, and the ad copy 32–48, 100 at most.
| Format | A single-image ad below a ChatGPT response, showing the advertiser name, favicon, title, copy, landing page and image (ChatGPT's ads basics page) |
|---|---|
| Aspect ratio | 1:1, square (ChatGPT's launch campaigns page) |
| Image size | No larger than 1200 × 1200 pixels in a bulk upload (ChatGPT's launch campaigns page); at least 640 × 640 through the ads API (ChatGPT's ads API guide) |
| File type | PNG or JPG in a bulk upload (ChatGPT's launch campaigns page); JPEG, PNG or WebP through the ads API (ChatGPT's ads API guide) |
| Maximum file size | Not stated on ChatGPT's ads help or ads API pages |
| Title | 16–24 characters recommended; 50 characters maximum (ChatGPT's launch campaigns page) |
| Ad copy | 32–48 characters recommended; 100 characters maximum (ChatGPT's launch campaigns page) |
| Landing page URL | One destination per ad, up to 2,048 characters through the ads API (ChatGPT's ads API reference); the page must be reachable and must not block the OAI-AdsBot and OAI-SearchBot crawlers (ChatGPT's page on creating ads) |
| Brand name | Set once for the ad account, not per ad: "The public name shown alongside your ads in ChatGPT" (ChatGPT's account setup page) |
| Multiple images | An open beta since 26 October 2026: 4–6 square images, each 1:1, all linking to one URL, with Learn more as the only call to action (ChatGPT's page on creating ads) |
| Video | No video format; the ad formats are single image and multiple images (ChatGPT's page on creating ads) |
| Who sees ads | Not users on Plus, Pro or any Business plan, nor accounts identified as belonging to users under 18 (ChatGPT's ads basics page); personalized ads are not initially available in the EEA or Switzerland (ChatGPT's page on ads in ChatGPT) |
What the other guides get wrong
Some guides give a 256 × 256 minimum, and others say no image specs are published. ChatGPT's ads help gives 1200 × 1200 as the bulk-upload maximum, and its ads API guide asks for at least 640 × 640.
Source: ChatGPT Ads help — Launch campaigns, as of . Each row names the ChatGPT page it quotes. Platforms revise specs without notice; check the source before you build a template on it.
Related reading
Terrads makes square image ads at 1080 × 1080, a size ChatGPT takes.