MicroPoster.so LogoMicroPoster
Crosspost Between Mastodon and Bluesky Automatically

Post on Mastodon. Appear on Bluesky. Automatically.

Stop copying and pasting. MicroPoster acts as your invisible bridge, natively syncing your Mastodon posts, images, and long threads directly to your Bluesky audience.

Start 7-Day Free Trial
No credit card required
100% Secure Auth

See it in action

A smarter way to grow your audience.

We ditched complex workflows. MicroPoster focuses entirely on making the connection between Mastodon and Bluesky flawless, native, and completely hands-off.

Smart Auto-Detection

Set up your sync rules once. MicroPoster quietly monitors your Mastodon feed in the background. When a new post is detected, it's automatically reformatted and pushed to your Bluesky profile.

Native Threads

Long Mastodon posts are automatically split and posted as 300-character reply-chains on Bluesky, preserving your storytelling.

Flawless Media

Images, videos, and GIFs are seamlessly downloaded from Mastodon and natively uploaded to Bluesky in high quality.

Smart Protocols

Mentions, spacing, and links are intelligently adapted from ActivityPub to fit Bluesky's AT protocol effortlessly.

Or Keep Full Control

Not ready for full automation? Use our dashboard to manually select, edit, and push specific posts whenever you want.

Auto-Sync
Manual Sync

Up and running in 40 seconds.

01

Connect via Secure Auth

Link your Mastodon instance and Bluesky account securely. We never ask for your primary passwords, and you maintain complete control.

02

Configure Automation

Choose source and target accounts. Set optional hashtags to append to your posts.

03

Post as Normal

Keep using Mastodon just like you always do. Our smart engine periodically checks your feed and handles the cross-posting silently in the background.

Frequently Asked Questions

Is it safe to connect my accounts?
Yes. We use standard OAuth 2.0 protocols directly with your Mastodon instance and standard secure app passwords for Bluesky. You never hand over your main passwords to us.
Does it support image and video cross-posting?
Absolutely. All media formats attached to your Mastodon posts are automatically processed, resized if necessary, and natively uploaded to Bluesky.
How are 500-character Mastodon posts handled?
Long Mastodon posts are automatically detected and converted into native Bluesky threads (reply-chains), respecting the 300-character limit per post and maintaining your original narrative flow.
What if I only want to cross-post specific posts?
You can turn off fully-automated sync and use our Manual Mode. You can log into your dashboard, select recent posts, edit them if desired, and click 'Post' to send them to Bluesky.
Do you offer a free trial?
Yes! Every new account gets a full 7-day free trial with unrestricted access to all automation features. No credit card is required to sign up.

Ready to double your reach?

Join creators and founders who are effortlessly growing their Bluesky audience without the extra work.

Start Your Free Trial

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