Crosspost from Threads to Reddit Automatically
Auto post Threads to Reddit instantly — no downloads, no re-uploads, no manual work. Just publish on Threads and your content appears on Reddit.
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Why Threads content does not automatically work on Reddit
! Reddit has strict anti-self-promotion rules; sharing your Threads content there risks removal
+ ! Threads requires an Instagram account; Reddit is completely independent
+ ! Both are text-first but with completely different community structures
+ ! Reddit's crosspost feature only works within Reddit, not from Threads
↓ There's an easier way
What You Need to Know
How creators adapt Threads content for Reddit communities
The approach that works: use your Threads post as the raw material for a proper Reddit text post.
Take the core idea, expand it significantly (Reddit rewards detailed posts), and frame it as a contribution to a specific subreddit's community — not as personal content promotion.
If your Threads post was a question or an opinion, turn it into a discussion thread on Reddit.
If it was a tip or insight, write a proper writeup with sources and context.
Check the subreddit's rules for self-promotion limits before posting.
The 10% rule applies broadly.
Writing for Reddit after posting on Threads
Reddit communities expect posts that serve the community, not the poster.
Strip all personal brand language and Meta/Instagram references.
Reddit formatting helps: use line breaks generously, bold key points, and use bullet lists for advice posts.
Your Threads take should become a Reddit proposition — something the community can upvote, debate, or add to.
The best Threads-to-Reddit crosspost is one where the Reddit audience never needs to know it started on Threads.
PostOnce automates Threads-to-Reddit crossposting
PostOnce connects Threads and Reddit so your content flows between platforms automatically.
Post on Threads and PostOnce handles the Reddit distribution — targeting the right subreddits based on your setup.
No manual reformatting, no missed communities.
Post once, reach both audiences.
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Features
How PostOnce Handles It
Set up Threads to Reddit crossposting once. PostOnce automates the rest.
Easy Threads Crossposting Setup
Connect your Threads and Reddit accounts, choose your crosspost rules, and you're done.
Setup takes under 60 seconds. After that, everything runs automatically in the background.
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Native Video Upload to Reddit
When you crosspost Threads to Reddit, PostOnce uploads the actual video file — not a link, not a preview.
Your Threads content appears as a native Reddit post, indistinguishable from content uploaded directly.
Start your free trialCustom Crosspost Rules
Not every Threads post belongs on Reddit. Set hashtag filters, content type rules, or account-level controls to choose what gets crossposted.
Only the content you want on Reddit ends up there.
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Auto Post to Multiple Platforms
Don't stop at Threads to Reddit crossposting. Auto post your Threads content to YouTube Shorts, Facebook, LinkedIn, Threads, and more — all at once.
One post, everywhere. Each platform gets a native upload with adapted formatting.
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Real-Time Automation
PostOnce monitors your Threads account and automatically crossposts new content to Reddit.
No scheduling, no batching. Publish on Threads and it appears on Reddit within minutes — fully automated Threads to Reddit posting.
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Threads vs Reddit at a Glance
| Spec | Threads | |
|---|---|---|
| Caption Limit | 500 chars | 40,000 chars |
| Max Video Length | 5min | 15min |
| Preferred Aspect Ratio | 9:16 | 16:9 |
| Max Video File Size | 1GB | 1GB |
| Carousel Support | Up to 20 items | Up to 20 items |
| Hashtag Strategy | Up to 1 | Not used |
| Link Support | Yes | Yes |
| Primary Audience | 18-34 | 18-39 |
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Under 60 seconds. Connect both your Threads and Reddit accounts, choose your filter rules, and you're done. New Threads posts will automatically appear on Reddit.
PostOnce automatically adapts your 9:16 Threads videos to Reddit's preferred 16:9 format, ensuring they look native.
Yes. Use hashtag filters to control which posts crosspost. For example, add #crosspost to Threads captions and only those posts will go to Reddit. Or exclude specific hashtags to skip certain content.
Your captions transfer in full since Reddit supports up to 40,000 characters, which accommodates Threads's 500 character limit.
Start Crossposting Threads to Reddit
Connect your Threads and Reddit accounts and start crossposting in minutes. No technical setup required.
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