PostEaseGuidesPublished Updated
Caption character limits, by platform
X cuts off at 280, YouTube allows 5,000. Every limit the composer's character check measures against, in one table.
where this happens in the app
Caption
Three blues, one kiln. Left to right: cobalt over white, a celadon that went greener than planned, and the one I will make again. Which would you pick?
- Instagram · Carousel, 4 photosTue 18:00
- TikTok · Photo postTue 18:00
- YouTube · Short, with coverTue 18:30
- LinkedIn · Morning slotWed 08:30
- X · Shortened to 280Tue 18:00
- Bluesky · Shortened to 300Tue 18:00
Every limit, in one table
Write one caption for several channels and the tightest limit is the one that decides what fits.
| Platform | Caption limit |
|---|---|
| X | 280 characters |
| Bluesky | 300 characters |
| Threads | 500 characters |
| 800 characters | |
| 2,200 characters | |
| TikTok | 2,200 characters |
| 3,000 characters | |
| YouTube | 5,000 characters |
| 63,206 characters | |
| WordPress | No fixed limit |
Checked while you type, not after you schedule
Pick the channels and the count below the caption follows your selection. Nothing is truncated in the composer, and typing is never blocked. Going over a channel's limit is a warning, not a hard stop: you can still schedule to it. Better to fix it first than to find out from a failed publish.
On YouTube, the caption is the description and the title is its own field
The caption goes out as the video's description, up to YouTube's 5,000 bytes. The title is a separate field in the composer, up to 100 characters. Leave it blank and the caption's opening is used, cut at 100 characters.
Questions
Which limit applies when one caption goes to several channels?
The tightest one. X cuts off at 280 characters and YouTube allows 5,000, so a caption written for both has to fit X. The composer’s count follows the channels you pick.
Does PostEase cut off a caption that is too long?
No. The composer warns when a caption runs over a channel’s limit but never truncates it or blocks typing. You can still schedule; fixing it first avoids a failed publish.
How long can a YouTube title be?
Up to 100 characters, in its own field in the composer. The caption goes out as the video’s description, up to YouTube’s 5,000 bytes, and a blank title uses the caption’s opening, cut at 100 characters.
Keep reading
- Adding alt text to the images you schedule
One composer field, sent with the image to Instagram, X, LinkedIn, Pinterest and Bluesky. Why the cap is 500 characters, and why video is left out.
- Saving a draft vs. scheduling a post
A draft needs a caption and a channel. Scheduling adds one rule: the time has to be at least five minutes from now.
- Can I navigate away while a video is uploading?
Yes. The upload keeps going in the background, with its progress in the sidebar on every screen, and a failure stays in the bell until you read it.
- How to schedule YouTube videos in advance
Connect a channel once, pick a time with its own timezone, and the video uploads then. Making it Public is still a manual step in YouTube Studio today.
- How to write social media captions that get engagement
- The multi-platform publishing playbook
- What is a hashtag?
Write one caption, checked against every channel you picked.
Every channel you have, included. Adding another does not change the price.