Free tools for posting
Free social media tools: a character counter, thread splitter, LinkedIn text formatter, post preview, image size guide and MCP config generator.
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Tools
- LinkedIn text formatter
Bold, italic and lists that paste into LinkedIn.
- Post preview
See one post on eight networks before it goes out.
- Character counter
Count a post per network and split it into a thread.
- Best time to post
The best day and hour for each network, in your time zone.
- Image and video sizes
Every image and video size for nine networks.
- MCP config generator
The exact MCP setup for your AI tool, ready to paste.
What they're for
Writing for several networks
Every network counts characters its own way: X weighs links and emoji, Bluesky counts what you see, LinkedIn allows 3,000. The character counter shows all of them at once and splits long text into a thread that fits.
Making LinkedIn posts stand out
LinkedIn has no bold or italic in posts. The text formatter swaps letters for Unicode ones that keep their style when pasted, adds lists, and shows where your post folds behind "…more".
Checking a post before it goes out
The post preview lays one post out the way X, LinkedIn, Bluesky, Mastodon, Facebook, Instagram, TikTok and YouTube show it, with your own photos or video, so you can catch a bad crop or a buried hook.
Getting images and video right
The size guide lists the image and video dimensions, ratios and file limits for each network, taken from their own documentation, so nothing gets cropped or rejected.
Posting from an AI tool
The MCP config generator gives you the exact setup to paste into Claude, Cursor, VS Code or another MCP client, so your AI tool can draft and schedule posts through Postbase.
Free, and private
All of the tools run in your browser. Nothing you type or add is uploaded, and you don't need an account. When you're ready to schedule, Postbase has a 7-day free trial.
Ready to get started?
Schedule to every network from one calendar, or let your AI agent do it.
Cancel anytime · or self-host for free
Postbase