Crosspost from TikTok to Reddit Automatically
Auto post TikTok to Reddit instantly — no downloads, no re-uploads, no manual work. Just publish on TikTok and your content appears on Reddit.
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The reality of posting TikToks to Reddit
! 'Crosspost' means something different on Reddit (sharing within Reddit)
+ ! Most subreddits ban or heavily restrict self-promotion
+ ! Reddit's audience is skeptical of overtly branded content
+ ! No native TikTok-to-Reddit video upload integration
↓ There's an easier way
What You Need to Know
How creators crosspost TikToks to Reddit today
The manual workflow: download the watermark-free TikTok, identify the right subreddit for the content topic (not your niche, but the topic of that specific video), check the subreddit's rules for video posts and self-promotion, upload the video, write a post title that matches what Reddit users in that community actually search for and discuss.
Make your Reddit video post feel native
Reddit communities are hyper-sensitive to content that feels promotional or out of place.
Three adjustments make a TikTok work as a Reddit post.
Skip the manual work with PostOnce
PostOnce handles the TikTok-to-Reddit upload automatically.
When you post a TikTok, PostOnce picks up the video, removes the watermark, and posts it to the subreddit you specify as a native video post with the title you configure.
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Features
How PostOnce Handles It
Set up TikTok to Reddit crossposting once. PostOnce automates the rest.
Easy TikTok Crossposting Setup
Connect your TikTok 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 TikTok to Reddit, PostOnce uploads the actual video file — not a link, not a preview.
Your TikTok content appears as a native Reddit post, indistinguishable from content uploaded directly.
Start your free trialCustom Crosspost Rules
Not every TikTok 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 TikTok to Reddit crossposting. Auto post your TikTok 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 TikTok account and automatically crossposts new content to Reddit.
No scheduling, no batching. Publish on TikTok and it appears on Reddit within minutes — fully automated TikTok to Reddit posting.
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TikTok vs Reddit at a Glance
| Spec | TikTok | |
|---|---|---|
| Caption Limit | 4,000 chars | 40,000 chars |
| Max Video Length | 10min | 15min |
| Preferred Aspect Ratio | 9:16 | 16:9 |
| Max Video File Size | 4GB | 1GB |
| Carousel Support | Up to 35 items | Up to 20 items |
| Hashtag Strategy | Unlimited | Not used |
| Link Support | No | Yes |
| Primary Audience | 16-34 | 18-39 |
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Under 60 seconds. Connect both your TikTok and Reddit accounts, choose your filter rules, and you're done. New TikTok posts will automatically appear on Reddit.
PostOnce automatically adapts your 9:16 TikTok 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 TikTok 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 TikTok's 4,000 character limit.
Start Crossposting TikTok to Reddit
Connect your TikTok and Reddit accounts and start crossposting in minutes. No technical setup required.
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