Connect Instagram to Threads

Before you start

• An Instagram Business or Creator account. Instagram only lets apps read posts from professional accounts. Switching is free in the Instagram app (Settings, then Account type and tools), and your posts and followers stay as they are.
• A Threads account. It does not need to be a professional account.
• A Post Once account. The free plan includes 10 reposts, with no card needed.

How to connect Instagram to Threads

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 Instagram and press Continue.

   

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

4. On Connect your accounts., press Connect on the Instagram row. Instagram’s sign-in page opens. If you have more than one account, choose the one you post on, then allow access.

   

5. Press Connect on the Threads row. Sign in on the Threads page that opens and allow access.

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

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

Already using Post Once?

If Instagram is already the source of your bridge, open Bridge and press Connect next to Threads in the Destinations card, or press Add destination on the dashboard.

If your bridge reads from another account, add a second bridge with Instagram 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 Instagram post becomes on Threads

On Instagram	On Threads
A Reel or video up to 3 minutes, vertical or square	A video post.
A Reel or video over 3 minutes, or a landscape one	Skipped, with “Threads only takes short vertical videos”.
A photo	A photo post.
A carousel (its video slides are left out)	A carousel of up to 20 photos.
A Story	Skipped. Threads does not take Stories.

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

Your Instagram caption goes with each repost.

Threads allows 500 characters. A longer caption on a photo or video is cut at 500, sometimes mid-word, so put what matters first.

Choose what goes to Threads

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

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

Your Instagram row also has Include trial reels. When it is off, the default, a trial reel waits until you share it with your followers, then reposts like a new post. Post Once checks for that every 30 minutes for up to 7 days. Turn it on to repost trial reels right away.

Check that it works

Post something on Instagram as usual. Within a minute or two it shows up under Your posts on the dashboard, then goes to Threads. 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.