Instagram and Facebook are owned by the same company, so linking them is the one cross-post that’s built in. That convenience is also why so many Facebook Pages are full of posts that obviously came from Instagram.
What native forwarding does and doesn’t do
Sharing an Instagram post onward to a Facebook Page is free and takes one setting. What it doesn’t do is adapt anything: the caption goes across as written, hashtags included.
Two things then give it away every time.
The hashtag block. Hashtags do real work on Instagram. On Facebook they mostly don’t, and a stack of them at the end of a post reads as imported.
“Link in bio”. Instagram restricts links in captions, which is why the phrase exists. Facebook posts take links directly. Telling a Facebook audience to check a bio is instructions for a different app.
Neither is hard to fix. Both persist because native forwarding doesn’t give you anywhere to fix them.
What each platform accepts
| Caption limit | 2,200 | 63,206 |
| Media required | Yes, every format | No, text posts are fine |
| Images | 10 per post, 8 MB | Supported |
| Video | 1 GB | 2 GB |
The asymmetry worth noticing: every Instagram format requires media, and Facebook is happy with text alone. So content flows from Instagram to Facebook easily, and plenty of Facebook content has nothing to send back.
Publishing to both properly
Rather than posting to Instagram and forwarding, publish to both from one draft with the caption adjusted:
- Upload the media once
- Select Instagram and your Facebook Page
- Write the Instagram caption with its hashtags
- Write the Facebook version without them, with the real link in the text
- Pick a time and queue it
That’s one extra minute and it removes both giveaways.
Formats that map across
Reels. Both platforms have them and they take the same vertical file, so this is the cleanest mapping of the pair.
Feed photos and carousels. These transfer straightforwardly, subject to the caption edit.
Stories. Both have them. They’re ephemeral on both, so scheduling them is about hitting a moment rather than building anything lasting.
When not to cross-post between them
If the two audiences genuinely differ, and for many businesses they do, identical content serves neither well. A Facebook Page following an older, more local audience and an Instagram account following a younger one are different rooms.
The test is the same as anywhere: would you post this version if it were the only one?
Plan limits
BulkPublish publishes to Instagram, Facebook and 13 other networks.
- Channels: Free: 3 (1 per platform). Pro: 30 (2 per platform). Business: 75 (5 per platform).
- Posts: Free: 3/day. Pro: 30/day. Business: unlimited.
- Storage: Free: 100 MB. Pro: 2 GB. Business: 10 GB.
If you run several Facebook Pages, the per-platform cap is 2 on Pro and 5 on Business, with extra slots available beyond that.
The short version
Native forwarding is free and carries the caption across untouched, which is exactly the problem: the hashtags and the “link in bio” come with it. Publishing to both from one draft with two captions costs a minute and removes both tells. And if the two audiences are genuinely different, consider not cross-posting at all.