Book a callSign inSign up
FeaturesWorkflowPlatformsFree toolsChangelogTeams and agenciesDevelopersUse casesDocsGuidesCompareAlternativesGlossaryDataPricingFAQBook a callSign inStart a trial
Glossary

Caption: what it means

A caption is the text that goes with an image or video in a post. Its limit varies: Instagram allows 2,200 characters, Telegram 1,024 for a caption and TikTok 2,200. A caption can hold hashtags, mentions and a call to action, and the first lines are what readers see before they tap to expand.

Also:Social media posting glossary

Updated 2026-10-23

Put the point in the first line, since many apps cut the caption after a few lines.

Networks differ on whether links in a caption are clickable.

Try it

Start a trial

7-day trial for $1. Connect your accounts and schedule a week of posts in one sitting.

Start a trial
Free in your browser

Free tools

Count characters the way each network does, split threads and preview posts. No account needed.

Open the tools
For builders

API and MCP

Post to every network from your own code or assistant with one key, signed webhooks and idempotent requests.

See the API

Questions

Is a caption different from alt text?

Yes. A caption is for everyone to read; alt text describes the image for people who cannot see it.

Schedule Pinterest posts: formats, limits, setupPinterest specs and limits: text, media, daily capFree image resizer and cropper for social postsHow to schedule Pinterest Pins in 1Post1Post vs Later: price, networks, APISocial media posting limits by network, dated
Social media posting glossary: terms explained

Get this week’s posts scheduled

Connect your accounts, write once and let 1Post publish on time while you get on with the rest of your day.

Start a 7-day trial for $1See pricing