How to Schedule Mastodon Posts in 2026

You can schedule Mastodon posts from any instance and cross-post to X, Threads, Bluesky, and LinkedIn at the same time. Mastodon's native scheduling is inconsistent across instances, so a third-party tool gives you reliable, cross-platform publishing. Here's how to set it up with Shaflex. You can also explore the full Mastodon scheduling experience on our platform page.

What you need

• A Mastodon account on any instance
• A Shaflex account (sign up free)

Step 1: Connect your Mastodon account

1. Sign in to Shaflex
2. Go to workspace settings → Add Integration → Mastodon
3. Enter your instance URL (e.g., mastodon.social, fosstodon.org, or your self-hosted domain)
4. Authorize Shaflex to post on your behalf
5. Done. Your Mastodon account is connected

Shaflex includes instance discovery and works with any Mastodon server. It automatically detects your instance's character limit.

Step 2: Compose your toot

1. Click Create Post and select your Mastodon channel
2. Write your post. Shaflex shows a live counter based on your instance's character limit (usually 500)
3. Add media if needed:
   • Up to 4 files (images, video, audio)
   • 40MB max per file
   • Alt text for accessibility

Step 3: Schedule or publish

• Publish now: Post immediately
• Schedule: Pick a date and time for automatic publishing

Cross-posting from Mastodon

Write your Mastodon post and simultaneously publish to:

• X/Twitter (280 chars. Shaflex warns if your post is too long)
• Threads (500 chars)
• Bluesky (300 chars. See how to schedule Bluesky posts)
• LinkedIn (3,000 chars)

Character limits are handled automatically. A 250-character post fits all platforms.

Which schedulers support Mastodon?

Tool	Mastodon	Any Instance
Shaflex	Yes	Yes
Buffer	Yes	Yes
Publer	Yes	Yes
Later	No	N/A
Hootsuite	No	N/A
Sprout Social	No	N/A
Metricool	No	N/A

Only Shaflex, Buffer, and Publer support Mastodon scheduling in 2026. For a full breakdown of free plans across these tools, see our free social media scheduling tools comparison.

Tips

• Add alt text to images. The Mastodon community values accessibility
• Cross-post strategically: some Mastodon communities dislike content that feels like automated cross-posts. Personalize when possible
• Use threads for longer content instead of compressing into one post

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Schedule Mastodon posts from any instance. Try Shaflex free. 3 channels, 30 posts/month.