Automatically Post Reddit to LinkedIn: Complete Guide
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Reddit reaches Young adults interested in niche communities while LinkedIn connects with Professionals and B2B decision-makers, letting you expand to a new audience segment. Your Reddit content format works on LinkedIn, so you can share without creating entirely new content. Whether you want to auto-post everything or filter by hashtag, this guide covers everything about Reddit to LinkedIn automation. Learn how to crosspost from Reddit to LinkedIn or repurpose your content for maximum reach.
Reddit to LinkedIn Content Compatibility
Video
Needs Adaptation
Images
Needs Adaptation
Text/Captions
Truncated
Reddit vs LinkedIn: Platform Specs
| Spec | ||
|---|---|---|
| Caption Limit | 40,000 chars | 3,000 chars |
| Max Video Length | 15min | 10min |
| Preferred Aspect Ratio | 16:9 | 16:9 |
| Max Video File Size | 1GB | 5GB |
| Carousel Support | Up to 20 items | Up to 20 items |
| Hashtag Strategy | Not used | Unlimited |
| Link Support | Yes | Yes |
| Primary Audience | 18-39 | 25-45 |
Why Automate Reddit to LinkedIn?
Repurpose Reddit content for your professional LinkedIn audience to build industry authority
Accompany your Reddit visuals with text-driven posts on LinkedIn for storytelling
Build a consistent brand presence across Reddit and LinkedIn with automated distribution
Manual Posting vs Automated Distribution
Manual Method
- ✗Upload the same video to LinkedIn after posting to Reddit
- ✗Copy and reformat captions for each platform
- ✗Constantly context-switch between apps
- ✗Risk forgetting to post to LinkedIn
- ✗Spend 10-15 minutes per post managing distribution
- ✗Miss peak posting times on LinkedIn
PostOnce Automation
- ✓Post to Reddit like normal—we handle LinkedIn
- ✓Captions automatically adapted for LinkedIn
- ✓Stay in your favorite platform's workflow
- ✓Every Reddit post automatically appears on LinkedIn
- ✓Set up once in under 60 seconds
- ✓Consistent posting schedule maintained automatically
Manual posting might work when you're just starting out, but as your content volume grows, automation becomes essential. The difference isn't just time saved—it's the ability to maintain a consistent multi-platform presence without burning out.
How to Set Up Reddit to LinkedIn Automation
Connect Reddit and LinkedIn
Link both social accounts to PostOnce using secure OAuth authorization.
Reddit uses standard OAuth and LinkedIn requires standard authorization. Both connect in seconds.
Configure your automation rules
Choose to crosspost everything or filter by hashtags, content type, or custom rules.
Since Reddit allows longer captions (40,000 chars) than LinkedIn (3,000 chars), you may want to review caption truncation settings.
Post on Reddit as usual
Create content on Reddit and PostOnce handles LinkedIn distribution.
Both platforms use 16:9 format, so your content transfers seamlessly.
Flexible Automation Options
Control exactly how your Reddit content gets distributed to LinkedIn with powerful automation rules.
Post Everything
Every Reddit post automatically goes to LinkedIn
Filter by Hashtag
Use specific hashtags to control what gets crossposted to LinkedIn
Custom Rules
Set advanced filters based on your Reddit to LinkedIn workflow needs
Most creators use hashtag filtering to maintain control over their crossposting workflow. For instance, you might want all your Reddit tutorials to go to LinkedIn, but keep personal content separate. Simply add a specific hashtag like #autopost to your Reddit caption, and only those posts will be distributed.
If you want to repurpose content from Reddit to LinkedIn, you can also customize how captions, formats, and media are adapted for each platform's unique audience and requirements.
What to Expect
Works Well
- ✓Photos and images work well on both platforms
- ✓Text-based posts work natively on both platforms
- ✓Both platforms prefer 16:9 video, so no reformatting needed
- ✓Links in posts are supported on both platforms
Needs Adaptation
- ~Captions may need shortening (40,000 chars to 3,000 chars)
- ~Videos over 10 minutes need trimming for LinkedIn
- ~Hashtag strategy differs between Reddit and LinkedIn
Doesn't Transfer
- ✗Most content elements transfer successfully
Known Limitations
- ⚠Reddit videos longer than 10 minutes need to be trimmed for LinkedIn
- ⚠Captions over 3,000 characters will be shortened for LinkedIn
Frequently Asked Questions
LinkedIn supports videos up to 10 minutes long, 5GB file size, in 16:9, 1:1, 9:16 aspect ratios. Captions can be up to 3,000 characters. Since Reddit allows up to 15 minutes, longer videos will need trimming.
Yes. PostOnce works with both personal and business accounts on both Reddit and LinkedIn. Connect via OAuth authorization—your credentials are never stored.
Reddit's peak engagement is 6-8 AM, 12-2 PM (US timezones), while LinkedIn's peak is 7-8 AM, 12 PM, 5-6 PM (weekdays). PostOnce can publish to LinkedIn at optimal times regardless of when you post on Reddit.
Hashtags are not used on Reddit. For LinkedIn: 3-5 industry-relevant hashtags recommended for reach. PostOnce lets you customize hashtag handling—keep them, remove them, or set platform-specific hashtag strategies.
PostOnce handles unlimited crossposting within your plan's limits. Every time you post on Reddit, it's automatically shared to LinkedIn—no per-post limits on automation.
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