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PostOnce works with Facebook Pages. It can’t post to personal Facebook profiles, because Facebook doesn’t allow apps to.

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Connect your Pages

The Facebook row on the Accounts page with the hint Facebook Pages only, not personal profiles
  1. On Accounts, click Connect Facebook.
  2. When Facebook asks, select every Page you want in PostOnce, including Pages you connected before.
  3. If you manage several Pages, PostOnce shows Choose Facebook Pages. Tick the Pages to connect and click Connect. Each Page counts as one account on your plan.
Facebook replaces your previous selection each time you connect. A Page you leave unticked loses access in PostOnce.
If no Page appears, make sure your Facebook profile has full control or admin access to the Page, then connect again. Missing a Page in the picker? Reconnect Facebook and allow that Page.

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Facebook as a source

  • PostOnce copies the Page’s posts, including shared posts. Page Stories are copied only if you turn on Stories in the workflow.
  • PostOnce checks Facebook for new posts every 10 minutes.

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Publishing to a Page

Facebook Reels must be vertical, at least 540 × 960 pixels, 3 to 90 seconds long and 24 to 60 frames per second. PostOnce adds bars to videos that are much taller or wider than Facebook allows, so they aren’t rejected. Links go in the post text.

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Facebook errors

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Still stuck?

Search this help center with ⌘ K, or email support@postonce.to from the address you use for PostOnce. Include the platform, the approximate time, and the exact message you saw. Never send passwords, access tokens, API keys, or card details. Something missing from PostOnce? Request a feature or check the roadmap.
Last modified on October 7, 2026