Connect Threads to Facebook

Before you start

• A Threads account. It does not need to be a professional account.
• A Facebook Page you manage. Facebook only lets apps post to Pages, not personal profiles.
• A Post Once account. The free plan includes 10 reposts, with no card needed.

How to connect Threads to Facebook

1. Create a free account at app.postonce.com. After two short intro screens, Post Once asks where you post.

2. Under Where do you post first?, pick Threads and press Continue.

   

3. Under Where else should it land?, pick Facebook. Add any other apps, or a backup, then press Continue.

4. On Connect your accounts., press Connect on the Threads row. Sign in on the Threads page that opens and allow access.

   

5. Press Connect on the Facebook row. Sign in with Facebook. In the permissions dialog, make sure the Page you want is selected. Back in Post Once, pick it in the Post to Page list on the Facebook row. With only one Page, it is picked for you. Nothing is posted to Facebook until a Page is picked.

6. When both rows say Connected, press Go to dashboard.

From then on, keep posting on Threads as usual. Post Once checks it about every five minutes and reposts each new post to Facebook.

Already using Post Once?

If Threads is already the source of your bridge, open Bridge and press Connect next to Facebook in the Destinations card, or press Add destination on the dashboard. Then pick the Page in the Post to Page list.

If your bridge reads from another account, add a second bridge with Threads as its source from the bridge switcher. Free and Solo include 1 bridge, Studio 3 and Agency as many as you need. See bridges.

What each Threads post becomes on Facebook

On Threads	On Facebook
A video up to 3 minutes, vertical or square	A Reel if it runs up to 90 seconds, otherwise a Page video.
A video over 3 minutes, or a landscape one	A Page video, up to 2 hours, titled with the first line of your caption.
A photo	A photo post.
A carousel (its video slides are left out)	One photo post with up to 10 photos.
A text post	A Page post with the same text.

A skipped post shows the reason on your dashboard and still goes to your other destinations. See long videos for how Post Once tells short from long.

How your caption carries over

The post text goes with each repost. When a text post has a link preview, the link’s address is added to the text. Quotes, polls and GIF posts are not reposted.

Facebook gets the caption up to 2,200 characters. A long video is titled with the first line of the caption.

Choose what goes to Facebook

On the Bridge page, the Facebook row has two settings.

• What to post has a switch for Videos, Photos and Text posts. Switch a kind off and those posts skip Facebook, though you can still send one there by hand. Switching every kind off pauses Facebook.
• Rewrite caption changes the caption for Facebook only: Remove comment, DM and link in bio prompts, Remove hashtags and mentions, Rewrite with AI to suit Facebook, and Add your own text at the start or end. Each one is off until you turn it on.

Check that it works

Post something on Threads as usual. Within about five minutes it shows up under Your posts on the dashboard (press Check now to look straight away), then goes to Facebook. Each post shows where it went, what was skipped and why.

If a repost fails, Post Once tries again up to 5 times over about half an hour. If it still fails, you get an email, and Retry sends it again to just the accounts it missed. See a post did not repost.

Only posts published after you connect are reposted on their own. Older ones are listed in Your posts, where you can send any of them by hand.