Schedule Facebook page posts. Including the first comment, which Facebook users forget exists.
Facebook has by far the most generous character budget of any platform here, takes up to ten media items, and supports a first comment — which almost nobody uses, even though it is the same link-in-comments trick that works everywhere else.
Pages, with official OAuth.
The most room, and the least reason to use it
Facebook's caption limit is enormous — orders of magnitude larger than X or Bluesky. That is a fact about the platform, not advice. A 60,000-character Facebook post is not a good Facebook post.
What the headroom is genuinely useful for is not having to think about length when a post is a few paragraphs, and not having a multi-platform post fail here because it was written for LinkedIn.
First comments on Facebook
This one is underused. Facebook supports a first comment, and the same logic applies as everywhere else: a link in the body competes with the platform's preference for keeping people on Facebook, and a link one comment down does not.
Postonus schedules the comment with the post, so it is a field you fill in while writing rather than a task for later.
Pages, not profiles
Facebook's publishing API covers pages. Personal profiles cannot be published to programmatically by any tool, so if you are scheduling for yourself rather than a brand, a page is the route.
Facebook and Instagram are separate connections here even though Meta owns both, because they are separate grants with separate permissions. One expiring does not affect the other.
In a multi-platform post
Because Facebook accepts long text and a lot of media, it is usually the channel that needs no override in a multi-platform post — the shared body fits. The overrides tend to be needed in the other direction, for the platforms with tight budgets. See multi-platform publishing.
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Limits
What Facebook allows in one post. The composer enforces these while you type.
- Characters per post
- 63,206
- Media per post
- 10
- Media types
- image, gif, video
- First comment
- Supported — up to 8,000 characters
Read from the same rules the composer and the publish workers use, so this table cannot drift from what actually publishes.
Questions
Frequently asked questions Everything the first evaluation usually needs.
- Can I schedule to a Facebook page?
Yes, through Facebook’s official authorisation. You grant permission to publish on behalf of the page, and Postonus never sees your password.
- Can I schedule the first comment on a Facebook post?
Yes. Facebook supports it and Postonus queues the comment with the post. It is the natural place for a link you do not want in the body.
- How many images can one post carry?
See the table above — it is generated from the rules the publisher enforces. Facebook is at the generous end for both media count and caption length.
- Do I need a page, or will a personal profile work?
A page. Facebook’s publishing API works with pages, not personal profiles, which is a platform restriction that applies to every scheduling tool.
- What happens if the page permission is revoked?
The channel shows as expired with a reconnect button, and queued posts are held rather than failed. Reconnecting resumes all of them at once.
Keep reading
- Instagram schedulerSchedule Instagram posts, carousels, and Reels with a first comment queued alongside, plus free tools for splitting grids and carousel panoramas.Read
- First commentQueue the first comment with the post itself, so links and hashtags land in the comments instead of the caption — on the platforms that support it.Read
- Multi-platform publishingWrite once and publish to 16 platforms, with per-channel overrides where the platforms differ. Limits are enforced as you type, from the rules workers use.Read