| Image size | 1200x630px |
| Aspect ratio | 1.9:1 |
| Max file size | 5 MB |
| Formats | image/jpeg, image/png, image/webp, image/gif |
| User-Agent | TelegramBot (like TwitterBot) |
Telegram generates link previews by fetching Open Graph tags server-side through its TelegramBot crawler. It supports both standard OG tags and Twitter Card tags, with the twitter:card value controlling whether a preview shows a large image or a small thumbnail.
This guide covers how TelegramBot crawls your pages, which tags it reads, image sizing and format requirements, how to clear cached previews with @WebpageBot, and the most common issues that prevent previews from appearing.
Understanding TelegramBot and how it fetches your link previews
Which meta tags Telegram reads and how they affect your preview
Image sizes, formats, and display behavior for Telegram link previews
How Telegram caches link preview data and how to force a refresh
Troubleshooting the most frequent Telegram link preview problems
Enter your site's URL to see how it looks on Telegram.