Automatically Post Bluesky to Threads: Complete Guide
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Bluesky reaches Tech enthusiasts and early adopters while Threads connects with Instagram users looking for text-based discussion, letting you expand to a new audience segment. Your Bluesky content format works on Threads, 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 Bluesky to Threads automation. Learn how to crosspost from Bluesky to Threads or repurpose your content for maximum reach.
Bluesky to Threads Content Compatibility
Video
Needs Adaptation
Images
Needs Adaptation
Text/Captions
Direct Transfer
Bluesky vs Threads: Platform Specs
| Spec | Bluesky | Threads |
|---|---|---|
| Caption Limit | 300 chars | 500 chars |
| Max Video Length | 1min | 5min |
| Preferred Aspect Ratio | 16:9 | 9:16 |
| Max Video File Size | 50MB | 1GB |
| Carousel Support | Up to 4 items | Up to 20 items |
| Hashtag Strategy | Unlimited | Up to 1 |
| Link Support | Yes | Yes |
| Primary Audience | 20-40 | 18-34 |
Why Automate Bluesky to Threads?
Accompany your Bluesky visuals with text-driven posts on Threads for storytelling
Build a consistent brand presence across Bluesky and Threads with automated distribution
Grow your Threads following by consistently sharing your best Bluesky content
Manual Posting vs Automated Distribution
Manual Method
- ✗Upload the same video to Threads after posting to Bluesky
- ✗Copy and reformat captions for each platform
- ✗Constantly context-switch between apps
- ✗Risk forgetting to post to Threads
- ✗Spend 10-15 minutes per post managing distribution
- ✗Miss peak posting times on Threads
PostOnce Automation
- ✓Post to Bluesky like normal—we handle Threads
- ✓Captions automatically adapted for Threads
- ✓Stay in your favorite platform's workflow
- ✓Every Bluesky post automatically appears on Threads
- ✓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 Bluesky to Threads Automation
Connect Bluesky and Threads
Link both social accounts to PostOnce using secure OAuth authorization.
Bluesky uses standard OAuth and Threads requires standard authorization. Both connect in seconds.
Configure your automation rules
Choose to crosspost everything or filter by hashtags, content type, or custom rules.
Your Bluesky captions fit within Threads's limits, so default settings work great.
Post on Bluesky as usual
Create content on Bluesky and PostOnce handles Threads distribution.
Your 16:9 Bluesky content is automatically reformatted to 9:16 for Threads.
Flexible Automation Options
Control exactly how your Bluesky content gets distributed to Threads with powerful automation rules.
Post Everything
Every Bluesky post automatically goes to Threads
Filter by Hashtag
Use specific hashtags to control what gets crossposted to Threads
Custom Rules
Set advanced filters based on your Bluesky to Threads workflow needs
Most creators use hashtag filtering to maintain control over their crossposting workflow. For instance, you might want all your Bluesky tutorials to go to Threads, but keep personal content separate. Simply add a specific hashtag like #autopost to your Bluesky caption, and only those posts will be distributed.
If you want to repurpose content from Bluesky to Threads, 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
- ✓Captions fit within the destination's character limit without truncation
- ✓Links in posts are supported on both platforms
Needs Adaptation
- ~Video aspect ratio needs to change from 16:9 to 9:16
- ~Hashtag strategy differs between Bluesky and Threads
Doesn't Transfer
- ✗Most content elements transfer successfully
Known Limitations
- ⚠Most Bluesky content works well on Threads with minor formatting adjustments
Frequently Asked Questions
Threads supports videos up to 5 minutes long, 1GB file size, in 9:16, 1:1, 16:9 aspect ratios. Captions can be up to 500 characters. Your Bluesky videos will fit within these limits.
Yes. PostOnce works with both personal and business accounts on both Bluesky and Threads. Connect via OAuth authorization—your credentials are never stored.
Bluesky's peak engagement is 9-11 AM, 4-7 PM, while Threads's peak is 7-9 AM, 12-2 PM, 6-9 PM. PostOnce can publish to Threads at optimal times regardless of when you post on Bluesky.
Hashtags are clickable but not algorithmically weighted. For Threads: Hashtag-like topics supported; one topic tag per post. 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 Bluesky, it's automatically shared to Threads—no per-post limits on automation.
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