Automatically Post Your Instagram Reels To TikTok
You can't share Instagram Reels to TikTok with a button. PostOnce posts each new Reel, photo and carousel to TikTok for you, so you never download and re-upload.
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Set up Instagram to TikTok once
One workflow, then every new Instagram post reaches TikTok on its own.
1.Connect InstagramUse the Business or Creator account you post Reels from.
2.Connect TikTokPick the account that should get each post.
3.Turn on the workflowPost right away or in your next publishing slot.
Sharing a Reel to TikTok by hand vs automatically
By hand, for every Reel
- Tap the three dots on the Reel and save it to your phone.
- In TikTok, tap the plus button, then Upload.
- Rewrite the caption and hashtags, then post.
- The saved copy can carry the Instagram watermark.
With PostOnce, once
- Connect both accounts.
- New posts go out by themselves, most within 30 minutes.
- Your caption comes along, trimmed to fit TikTok.
What TikTok gets from your Instagram post
- Reels become TikTok videos
- PostOnce uploads the file itself, so no Instagram watermark.
- Carousels become photo posts
- Up to 35 images, with a track TikTok adds. Videos in a mixed carousel are left out.
- Licensed music
- The Reel posts, but TikTok may mute or remove it, because music rights don't transfer.
- Captions and hashtags
- Cut at 2,200 characters, with 5 hashtags kept.
- Trial Reels and Stories
- Off unless you turn them on.
- Only some posts
- Send or skip posts by hashtag.
- Account type
- Instagram Business or Creator only.
Same Reels on Instagram and TikTok: real accounts
Whatsunique posts on Instagram. PostOnce keeps TikTok fed with the same videos.
Instagram to TikTok questions
Can you post Instagram Reels on TikTok?
Yes. Instagram has no button for it, so either save each Reel and upload it in TikTok, or connect both accounts to PostOnce and new Reels post there automatically.
Is there a button to share from Instagram to TikTok?
No. Adding your Instagram to your TikTok profile only shows a link; it doesn't copy posts. Moving a Reel takes a download and re-upload, or an automation.
Can you post on Instagram and TikTok at the same time?
Yes. Post on Instagram as usual and PostOnce sends it on straight away. Half of these posts went live within 15 minutes, and 87% within 30.
How do I share an Instagram post or carousel to TikTok?
Keep photos and carousels on in the workflow. Each arrives as a photo post, and TikTok picks the music.
Will my TikTok have the Instagram watermark?
No. The watermark comes from saving a Reel in the Instagram app. PostOnce uploads the video file instead.
What happens to the music in my Reel?
The Reel still posts. Rights to music licensed inside Instagram don't carry over, so TikTok may mute or remove the video later. Original audio is the safe choice.
Does crossposting hurt reach on TikTok?
Not by itself. PostOnce posts through TikTok's official posting API, like any scheduler. How2Rizz reached about 15k TikTok followers posting the same videos through PostOnce. Brand-new or inactive accounts get few views either way, so warm a new account up first.
Do I need an Instagram Business or Creator account?
Yes. Instagram only lets apps read posts from Business and Creator accounts. Switching is free in Instagram's settings.
Can I move my old Reels to TikTok?
Yes. Turn on existing posts and PostOnce works through your back catalog. TikTok lets apps publish about 15 posts a day per creator, so at that cap PostOnce waits 24 hours and carries on.
Are Trial Reels and Stories posted?
Not by default. You can include both, and Stories post as regular TikToks.
More Instagram and TikTok routes
Start posting your Instagram Reels to TikTok
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