Schedule Mastodon posts from one calendar
Schedule Mastodon posts on whichever server your account lives, from the same calendar as your other channels.
No card needed · moves to Free after 14 days
Publishes to all 11 platforms: LinkedIn, Instagram, Facebook, X, YouTube, TikTok, Pinterest, Threads, Google Business, Bluesky and Mastodon.
Why Mastodon posting slips
Posting when you remember
Mastodon rewards a steady rhythm, and posting in bursts then stopping resets it.
Finding out at the last minute
A caption over Mastodon's limit, or the wrong kind of media, is only refused when you press Post.
One app per platform
Opening Mastodon, then every other app, to post the same news is slow and easy to forget.
How Optimate schedules Mastodon
Write it once, check it against Mastodon's own rules, and pick a time. It publishes while you get on with your day.
One calendar for every platform
Mastodon sits on the same planner as LinkedIn, Instagram, Facebook, X, YouTube, TikTok, Pinterest, Threads, Google Business and Bluesky.
Checked against Mastodon's rules
The caption is counted as you type and the media checked before it is queued, so a post Mastodon would refuse is caught before it is scheduled.
Tailored per platform
Post the same news everywhere, with the wording adjusted for Mastodon, and preview it the way Mastodon will show it.
Post now or later
Pick a time, or publish straight away when something can't wait.
Mastodon's limits
- Caption length
- 500 characters
- Photos and video
- Text, with up to 4 images or one video.
- Image size (post image)
- 1,600 × 900 px, 16:9
- Good to know
- Some servers allow more than 500 characters; Optimate reads your server's own limit when you connect.
How it works
- 1
Connect Mastodon
Sign in to Mastodon from Connections. It takes a minute.
- 2
Write the post
Write it yourself, or start from a caption written in your brand's voice.
- 3
Pick a time
Schedule it, and it goes out on Mastodon at that time.
Scheduling somewhere else too?
Common questions
Can I schedule Mastodon posts for free?
Yes. Every new account starts with a 14-day free trial, no card needed, and the Free plan afterwards keeps a small queue of scheduled posts.
What is Mastodon's character limit?
500 characters for a post or caption. Optimate counts as you type and warns before you schedule anything Mastodon would refuse.
What can I attach to a Mastodon post?
Text, with up to 4 images or one video.
Can I post the same thing to Mastodon and other platforms?
Yes. Write one post, tick every platform it should go to, and adjust the wording for each one before it is scheduled.
Mastodon image sizes
Every size Mastodon asks for, from posts to profile pictures, on one page with every other platform's.
See the image sizesQueue a week of Mastodon posts in one sitting
14-day free trial, no card needed.