SynupHelp Center
Browse help
SOCIAL

Networks and character limits

Which networks can I post to, and what are the character limits?

Synup publishes to nine networks: Google Business Profile, Facebook, Instagram, X, LinkedIn, Pinterest, Bluesky, TikTok and Threads. What you can actually select in a given post is narrower than that — it is whichever profiles are connected to your account, which is why two clients on the same plan see different options.

Character limits, per network

The composer counts against each selected network separately, so a message that is fine for Facebook can be over the limit for X in the same post.

  • Google Business Profile — 1,500
  • Facebook — 30,000
  • Instagram — 2,200
  • TikTok — 2,200
  • LinkedIn — 2,000
  • Pinterest — 500
  • Threads — 500
  • Bluesky — 300
  • X — 280

X is the one that catches people. At 280 characters it will stop a post that reads perfectly everywhere else, so write for X first if it is in the mix, or give it its own post.

Why the platform row shows fewer icons than you have profiles

The Choose profiles to publish to dialog showing the platform filter row above the count of fifteen profiles across one hundred and thirty-six locations

The boxed row in the profile picker filters by platform, and it lists eight: Google Business Profile, Facebook, Instagram, X, LinkedIn, Pinterest, TikTok and Threads.

If you have a profile connected on a network that isn't in that row — Bluesky, or a Mastodon account — you can still select it and still publish to it. It just won't have a filter chip, and it won't show its own media guidance in the composer. Find it by name in the search box instead of by platform icon.

Post types, and which networks take them

Three types are creatable, and the channel restrictions are hard limits rather than recommendations:

  • Announcement — Google and Facebook. The default, and the only type that reaches more than one network.
  • Offer — Google only. Also needs the offer's terms, coupon code and redeem URL before it can publish.
  • Event — Google only. Also needs a title, start and end.

Those extra fields are enforced when you publish, not when you save a draft, so you can park a half-finished offer and come back to it.

Call-to-action buttons

Six buttons are available: Learn More, Sign Up, Order Online, Book, Buy and Call Now. The first five need a destination URL. Call Now doesn't — it uses the location's phone number. Facebook maps these onto its own button vocabulary when it publishes.

Next

For what images and video each network takes, see attaching media. To put this into a post, see the composer.