Crosspost from Facebook to Reddit Automatically
Auto post Facebook to Reddit instantly — no downloads, no re-uploads, no manual work. Just publish on Facebook and your content appears on Reddit.
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Sharing Facebook content on Reddit: proceed carefully
! Most subreddits prohibit or restrict self-promotional content from Facebook pages
+ ! Reddit's spam filter aggressively flags accounts that post Facebook links repeatedly
+ ! Facebook URLs posted on Reddit don't render as embeds — just plain links
+ ! Reddit communities have specific norms that Facebook-style content often violates
+ ! Reddit's 90/10 rule: only 10% of posts should be self-promotional
↓ There's an easier way
What You Need to Know
How to actually share Facebook content on Reddit
If the Facebook content is a video: download the video, upload it directly to Reddit as a video post.
This performs far better than a Facebook link.
If it's an image: download and repost natively.
If it's a text post: rewrite it for Reddit's tone and post as a text self-post, crediting the original context if needed.
Never just paste a Facebook page link into Reddit and expect traction.
Check each subreddit's rules before posting — many have explicit bans on social media self-promotion or require a minimum account karma to post links.
What Reddit actually responds to from Facebook content
Reddit rewards specificity and authenticity.
A Facebook post that got shares because it was warm and relatable may fall flat on Reddit, which values directness and resists anything that smells like marketing.
Strip the Facebook formatting (emoji bullets, 'like and share!' language) entirely.
Write a Reddit title that matches the subreddit's naming conventions.
If the content is genuinely valuable to a specific community — not just promotional — it will perform.
Niche subreddits with engaged audiences outperform large general ones for any crossposted content.
PostOnce keeps Facebook content moving to Reddit strategically
PostOnce can push new Facebook content to Reddit automatically — with post titles rewritten for Reddit's format and content adapted for subreddit-specific norms.
You define which subreddits to target, and PostOnce handles the posting without the spam risk of manual repetitive posting.
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Features
How PostOnce Handles It
Set up Facebook to Reddit crossposting once. PostOnce automates the rest.
Easy Facebook Crossposting Setup
Connect your Facebook 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 Facebook to Reddit, PostOnce uploads the actual video file — not a link, not a preview.
Your Facebook content appears as a native Reddit post, indistinguishable from content uploaded directly.
Start your free trialCustom Crosspost Rules
Not every Facebook 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 Facebook to Reddit crossposting. Auto post your Facebook content to YouTube Shorts, Facebook, LinkedIn, Threads, and more — all at once.
One post, everywhere. Each platform gets a native upload with adapted formatting.
Start your free trialReal-Time Automation
PostOnce monitors your Facebook account and automatically crossposts new content to Reddit.
No scheduling, no batching. Publish on Facebook and it appears on Reddit within minutes — fully automated Facebook to Reddit posting.
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Facebook vs Reddit at a Glance
| Spec | ||
|---|---|---|
| Caption Limit | 63,206 chars | 40,000 chars |
| Max Video Length | 4h | 15min |
| Preferred Aspect Ratio | 16:9 | 16:9 |
| Max Video File Size | 10GB | 1GB |
| Carousel Support | Up to 10 items | Up to 20 items |
| Hashtag Strategy | Unlimited | Not used |
| Link Support | Yes | Yes |
| Primary Audience | 25-54 | 18-39 |
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Frequently Asked Questions
Under 60 seconds. Connect both your Facebook and Reddit accounts, choose your filter rules, and you're done. New Facebook posts will automatically appear on Reddit.
Yes, both platforms use 16:9 as their preferred format, so your videos transfer without any reformatting.
Yes. Use hashtag filters to control which posts crosspost. For example, add #crosspost to Facebook captions and only those posts will go to Reddit. Or exclude specific hashtags to skip certain content.
PostOnce intelligently adapts your captions from Facebook's 63,206 character limit to fit Reddit's 40,000 character limit, preserving your key message.
Start Crossposting Facebook to Reddit
Connect your Facebook and Reddit accounts and start crossposting in minutes. No technical setup required.
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