# Telegram link preview checker

> Telegram shows og:site_name as a coloured header, then the title, description and image.

Check a URL: https://sharelint.pages.dev/?url=<your-url>, or as Markdown: https://sharelint.pages.dev/api/preview?format=md&url=<your-url>

## Tags Telegram reads (fallback order)

- Site name: `og:site_name`
- Title: `og:title` -> `twitter:title` -> `<title>`
- Description: `og:description` -> `twitter:description`
- Image: `og:image` -> `twitter:image`

## Image requirements

- Recommended: 1200×630
- Minimum: 100×100
- Maximum weight: 5 MB
- Formats: JPEG, PNG, WebP

## Card layout

Wide images, or pages that set twitter:card to summary_large_image, get a large photo. Other images show as a small thumbnail on the right.

## Refreshing the cache

Send the URL to @WebpageBot in Telegram to clear its cached preview.

## Common problems

- A stale preview is cached server-side. Refresh it with @WebpageBot.

Rule confidence: observed.