Automatically Post TikTok to Threads: Complete Guide
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TikTok reaches Gen Z and young Millennials while Threads connects with Instagram users looking for text-based discussion, letting you expand to a new audience segment. Your TikTok 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 TikTok to Threads automation. Learn how to crosspost from TikTok to Threads or repurpose your content for maximum reach.
TikTok to Threads Content Compatibility
Video
Needs Adaptation
Images
Direct Transfer
Text/Captions
Truncated
TikTok vs Threads: Platform Specs
| Spec | TikTok | Threads |
|---|---|---|
| Caption Limit | 4,000 chars | 500 chars |
| Max Video Length | 10min | 5min |
| Preferred Aspect Ratio | 9:16 | 9:16 |
| Max Video File Size | 4GB | 1GB |
| Carousel Support | Up to 35 items | Up to 20 items |
| Hashtag Strategy | Unlimited | Up to 1 |
| Link Support | No | Yes |
| Primary Audience | 16-34 | 18-34 |
Why Automate TikTok to Threads?
Share your TikTok short videos on Threads to double your video views without extra filming
Accompany your TikTok visuals with text-driven posts on Threads for storytelling
Build a consistent brand presence across TikTok and Threads with automated distribution
Manual Posting vs Automated Distribution
Manual Method
- ✗Upload the same video to Threads after posting to TikTok
- ✗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 TikTok like normal—we handle Threads
- ✓Captions automatically adapted for Threads
- ✓Stay in your favorite platform's workflow
- ✓Every TikTok 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 TikTok to Threads Automation
Connect TikTok and Threads
Link both social accounts to PostOnce using secure OAuth authorization.
TikTok uses platform-specific 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.
Since TikTok allows longer captions (4,000 chars) than Threads (500 chars), you may want to review caption truncation settings.
Post on TikTok as usual
Create content on TikTok and PostOnce handles Threads distribution.
Both platforms use 9:16 format, so your content transfers seamlessly.
Flexible Automation Options
Control exactly how your TikTok content gets distributed to Threads with powerful automation rules.
Post Everything
Every TikTok 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 TikTok to Threads workflow needs
Most creators use hashtag filtering to maintain control over their crossposting workflow. For instance, you might want all your TikTok tutorials to go to Threads, but keep personal content separate. Simply add a specific hashtag like #autopost to your TikTok caption, and only those posts will be distributed.
If you want to repurpose content from TikTok 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
- ✓Carousel/multi-image posts are supported on both platforms
- ✓Both platforms prefer 9:16 video, so no reformatting needed
Needs Adaptation
- ~Captions may need shortening (4,000 chars to 500 chars)
- ~Videos over 5 minutes need trimming for Threads
- ~Hashtag strategy differs between TikTok and Threads
- ~Carousels may need to be trimmed from 35 to 20 items
Doesn't Transfer
- ✗Original music/audio from TikTok won't carry over
- ✗Duet/stitch features are TikTok-only
- ✗Stories format doesn't exist on Threads
- ✗TikTok doesn't support caption links, so no links will transfer
Known Limitations
- ⚠TikTok videos longer than 5 minutes need to be trimmed for Threads
- ⚠Captions over 500 characters will be shortened for Threads
- ⚠Licensed music from TikTok cannot be transferred to Threads
- ⚠Duet/stitch content is TikTok-specific and won't transfer
- ⚠TikTok Stories cannot be crossposted to Threads
- ⚠Carousels with more than 20 items will be truncated on Threads
- ⚠TikTok doesn't support caption links, so no links will be included in Threads posts
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. Since TikTok allows up to 10 minutes, longer videos will need trimming.
Yes. PostOnce works with both personal and business accounts on both TikTok and Threads. Connect via OAuth authorization—your credentials are never stored.
TikTok's peak engagement is 7-9 AM, 12-3 PM, 7-11 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 TikTok.
Hashtags boost discoverability via For You Page algorithm. 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 TikTok, it's automatically shared to Threads—no per-post limits on automation.
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