Pinterest field limits and posting rules
Last reviewed: 29 August 2026
No single post cap: a title holds 100 characters, a description 500 and alt text 500. That is three fields, not one limit. A carousel Pin holds at most 5 images.
What are Pinterest's limits at a glance?
The table gives the figure Postey applies for Pinterest, the field it applies to, the unit it is counted in, and whether Pinterest enforces it when a post is published.
| Field | Maximum | Counted in | Enforced at publish? |
|---|---|---|---|
| description | 500 | Code points | Field maximum only |
| title | 100 | Code points | Field maximum only |
| description | 500 | Code points | Field maximum only |
| alt text | 500 | Code points | Field maximum only |
How long can a Pinterest description be?
Pinterest has no single description cap. 500 is the description field maximum in the API model, not a publish-time check, so Postey does not present it as a post limit.
How does Pinterest count a character?
Pinterest counts code points, which is the unit Python’s len() returns on Postey’s backend, so the count you see in Postey is the count Pinterest applies.
What are Pinterest’s field limits?
Pinterest limits three fields: title to 100 characters, description to 500 characters and alt text to 500 characters. That is three separate maxima, not one post limit.
What media rules apply to a Pinterest description?
Pinterest applies two media rules Postey enforces before it publishes.
A carousel Pin holds at most 5 images.
Every Pin needs a board, and every video Pin needs a cover image.
What happens to a Pinterest draft that is over the limit?
Postey flags the draft against the 500-character field maximum and says on the spot that this is a field maximum rather than a publish-time check. Pinterest does not thread.
How does Pinterest compare with the other platforms?
Postey publishes the same draft to every platform below, reshaping it against each one's own limit rather than against Pinterest's.
| Platform | Field | Limit | Counted in | Enforced at publish? |
|---|---|---|---|---|
| X | post | 280 characters | Weighted (link 23, emoji 2) | Yes, at publish time |
| post | 3,000 characters | Code points | Yes, at publish time | |
| Threads | post | 500 characters | Code points | Yes, at publish time |
| Bluesky | post | 300 graphemes | Graphemes | Yes, by the protocol |
| caption | 2,200 characters | Code points | Yes, at publish time | |
| TikTok | caption | 2,200 characters | Code points | Yes, at publish time |
| YouTube | description | 5,000 characters | Code points | Field maximum only |
| post | 63,206 characters | Code points | Yes, at publish time |
Read the full reference for every platform Postey publishes to.