Telegram formatting: how to structure a long channel post
A long product explanation needs more structure than a short update. As a photo caption, a long post also hits a length limit. Telegram does not measure how many readers reach the end of a post.
How long a post and a caption can be
Telegram publishes no length limit for a text-only post or message typed in the app. Captions, messages from the Rich Text Editor and bot messages do have documented limits.
| Where the text goes | Limit | What to know |
|---|---|---|
| Caption under a photo or video | 1,024 characters | 4,096 if the sender has Premium; both are default values in Telegram's documentation |
| Message written in the Rich Text Editor | 32,768 characters | Premium only at launch; its use for channel posts is not described |
| Message sent by a bot | 4,096 characters | A bot's rich message with extended formatting can reach 32,768 characters |
A post that fits under a photo on a Premium account can be too long for a colleague without Premium, so check that whoever publishes it has Premium too. If the text does not fit, move it into a separate message.
The Rich Text Editor and what it changes
On 14 July 2026 Telegram added a Rich Text Editor for blogs, articles and long posts. It supports headings, tables, lists, quotes and code blocks, and photos and videos can sit in the middle of the text. Since August 2026 it also takes documents, files and music inside the text. The editor opens from the ⛶ icon that appears after more than three lines in the message field.
Telegram has not said whether channel posts can be written in it or how its messages look to readers without Premium. Outdated apps that cannot show a new feature display a placeholder with a button to update, so some readers may not see a post written in the editor as intended. A test in a spare channel shows whether your account can publish with the editor and what such readers get.
How to make a long post easy to follow and to act on
Every post can use bold, italic and underlined text, links and spoilers. Keep bold for a few key words. Ad review checks the channel an ad leads to, and excessive highlighting in that channel's posts can be a reason for rejection.
Put details into a collapsible quote, available since May 2024: readers can expand it or scroll past it. Write dates with Date formatting, added in March 2026. Readers on a current app see such a date in their own local time and can add it to a calendar or set a reminder.
Links can sit under words instead of a bare address. Telegram apps show an alert with the full address before they open such a link, so readers still see where it leads.
Since 25 August 2026 a channel can show new members a welcome message that only they see, with rich formatting, tables and media inside the text. Use the welcome message to tell a newcomer which post explains the product.
What the statistics show about a long post
Post views are approximate, and Telegram offers no measure of reading to the end or of reading time. It also gives no split of results by post length or format.
If the channel is advertised, one number does not depend on views, forwards or reactions: the cost per subscription adjusted for unsubscribes.
How to compare paid growth between periods in Adstat
A Telegram ad cannot carry the long explanation itself. Its text is limited to 160 characters, without line breaks or lists, so the ad brings people to the channel where the long post is.
Adstat's platform for Telegram Ads works inside an agency or reseller ad account and shows ad results by day, week or month and for each ad separately. Make @adstat_invite_bot an administrator of the channel and switch on Create invite link when you create an ad: each such ad then gets its own link. In the By ads breakdown, our report shows subscriptions, unsubscribes and the cost per subscription adjusted for unsubscribes. The calculation is spend / (subscriptions - unsubscribes), counting only people who subscribed during the selected period.
To compare paid growth across weeks with different kinds of posts, keep your own log of which weeks carried mostly long posts and which mostly short ones. Then compare the cost per subscription adjusted for unsubscribes for the same ads across those weeks. Leave out any week in which subscriptions minus these unsubscribes come to zero or less: the figure has no meaning there.
This compares periods and is not an experiment, so a difference between the weeks does not show an effect of post length. Subscription and unsubscribe data come only from links created in our service, which measures neither post views nor reading to the end.
Questions and answers
Does Markdown work in posts typed in the app?
Telegram does not say. It documents Markdown only for messages that bots send, so format posts typed in the app with the app's own tools.
Can a long article on a website bring readers to the channel?
Yes, if the site has an Instant View template, the set of rules that builds such pages from its articles. When the template holds a link to the channel, the Instant View pages can show a button to join it.
What to do first
- Put the main point and the action in the first lines of the post.
- Keep captions within 1,024 characters unless everyone who publishes has Premium, and move longer text into a separate message.
- Hide details in collapsible quotes.
- Mark dates with Date formatting so readers on a current app see them in their own local time.
- Before you write channel posts in the Rich Text Editor, check in a spare channel whether your account can publish with it. If it can, open the test post on an account without Premium and on an older app to see what those readers get.
- Write a welcome message that tells new members which post explains the product.
- Before the weeks you want to compare, create each ad with Create invite link switched on. Then note in your own log which weeks carried mostly long posts, and compare the cost per subscription adjusted for unsubscribes for the same ads.