Reels post as Threads videos
Reels go to Threads as videos, up to 5 minutes. Longer ones don't post.
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Auto post from Instagram to Threads
To share an Instagram post to Threads, switch on Share to Threads on Instagram's post screen as you publish. To skip that step on every post, PostOnce sends each new Reel, photo and carousel to Threads automatically, with the caption fitted to 500 characters.
- No credit card
- 3 min setup
Reel on Instagram
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How to automatically share Instagram posts to Threads
Of the Instagram posts PostOnce sent to Threads right away in the last 30 days, half were live within 5 minutes.
Connect Instagram
Instagram needs a Business or Creator account.
Connect Threads
Sign in to the Threads profile that should post.
Turn on the workflow
Reels, photos and carousels go to Threads on their own.
Instagram's Threads toggle vs PostOnce
With Instagram's option
- Share to Threads from Instagram as you publish.
- Fit the caption to Threads yourself.
- Posts from before stay where they are.
With PostOnce, once
- Every new Reel, photo and carousel goes.
- Captions fitted to 500, or rewritten by AI.
- Hashtag filters, older posts and more destinations.
Cross-post to Threads, Reels and carousels included
Carousels, photos and videos mixed
Carousels post as Threads carousels of up to 10 items, photos and videos mixed. A longer carousel posts its first 10.
Captions fit 500 characters
Instagram allows 2,200 characters and Threads 500. Long captions are cut at a paragraph or word break, or Rewrite caption with AI writes a conversational post with one hashtag.
Pick your length
Set each Threads account to 500, 280 or 160 characters.
Stories and Trial Reels stay off
Feed posts and Reels go by default. Turn on Stories or Trial Reels if you want them on Threads too.
Instagram to Threads crossposting questions
Does Instagram automatically post to Threads?
Instagram can share a post to Threads as you publish it. To send every new post without thinking about it, PostOnce posts your Reels, photos and carousels to Threads within minutes.
Can you crosspost Reels from Instagram to Threads?
Yes. PostOnce posts Reels as Threads videos, up to Threads' 5-minute limit.
How do I stop Instagram from sharing to Threads?
Switch off the Threads option when you share on Instagram. With PostOnce, pause the workflow, or use a hashtag filter to skip single posts.
What happens to long Instagram captions?
PostOnce cuts them to fit Threads' 500 characters, at a paragraph or word break. Turn on Rewrite caption with AI for a shorter post written for Threads; it drops hashtag blocks and "link in bio".
What happens to carousels with more than 10 items?
Threads takes up to 10, so PostOnce posts the first 10.
Do I need an Instagram Business or Creator account?
Yes. Personal Instagram accounts can't connect, so switch to a Business or Creator account first.
Can I post my older Instagram posts to Threads?
Yes. Turn on existing posts, on paid plans and the free trial.
More ways to crosspost Instagram and Threads
Start posting Instagram to Threads
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