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Mastodon posts

Text, photos and video on your Mastodon account, on whichever server it lives, with content warnings, visibility, threads and a first reply.

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Scheduled for you

  • Text, photos and video
  • Any server
  • Content warnings and visibility
  • Threads and first reply
Scheduled for Mastodon

What account you need

An account on any Mastodon server (Mastodon 4 or newer works best).

  • You sign in on your own server. reelport.io asks to read your account and posts, publish posts and media, and favourite replies from Community.
  • Each server sets its own character limit; reelport.io reads it when you connect and counts against it.

What you can post to Mastodon

Checked when you upload and when you schedule, not after a post fails.

  • Text

    500 characters on most servers (yours may allow more). Links count as 23.

  • Photos

    Up to 4 per post with alt text up to 1,500 characters. Most servers take up to 16 MB each.

  • Video

    One per post. Most servers take up to 99 MB.

Mastodon options in the composer

Below the shared caption, only the options this platform actually asks for.

Visibility
Public, quiet public (kept out of trends and search) or followers only.
Content warning
Folds the post behind a short note; photos and video can be marked sensitive.
Language
Tells servers the post’s language, for people who filter by it.
Thread
Follow-up posts, each a reply to the one before; a long caption splits for you.
First reply
Posted under the post right after it goes live.

Mastodon specs

Limits reelport.io checks before a post to Mastodon is scheduled.

Mastodon formats and limits
Text500 characters on most servers (yours may allow more). Links count as 23.
PhotosUp to 4 per post with alt text up to 1,500 characters. Most servers take up to 16 MB each.
VideoOne per post. Most servers take up to 99 MB.
Account An account on any Mastodon server (Mastodon 4 or newer works best).
Options Visibility · Content warning · Language · Thread · First reply

Plan, measure and answer on Mastodon

Publishing is the start. The rest of reelport.io works on this channel too.

How connecting works

You sign in on the platform’s own page. reelport.io never sees your password, and its stored logins are encrypted.

  1. 01

    In Channels, choose Mastodon and enter your server, like mastodon.social.

  2. 02

    Sign in on your server and allow reelport.io.

  3. 03

    Your account shows up as a channel.

Mastodon questions

Does reelport.io work with my Mastodon server?

Yes, with any Mastodon server: enter its address when you connect and sign in there. reelport.io reads your server’s character limit and counts against it.

What can I post to Mastodon?

Text, up to 4 photos with alt text or one video, with visibility (public, quiet public or followers only), a content warning, the language, follow-up posts and a first reply.

Can I answer Mastodon comments in reelport.io?

Yes. Mastodon comments land in Community, the inbox, with saved replies and optional AI reply suggestions.

Can reelport.io pick the best time to post on Mastodon?

Yes. Give the channel a posting schedule of time slots, and once insights come in reelport.io suggests the times your Mastodon audience responds best. Posts go out from servers in the EU, with retries after 1, 5 and 15 minutes.

Other channels

Your next post to Mastodon, on time.

Private beta: join the waitlist, invited accounts start on the Free plan. Hosted in the EU.

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