Writing LinkedIn posts isn’t always easy.
If you’ve ever stared at a messy draft and wondered how to turn it into something engaging, you’re not alone.
I used to struggle with this every time I wanted to post. How do I add a hook that grabs attention? How do I include my personal story without sounding repetitive? How do I make sure the post has takeaways, an engagement question, and a strong call to action?
That’s when I decided to build a custom GPT for LinkedIn post writing.
Most of my ideas start as random thoughts or notes. They make sense in my head but not on paper. When I looked back at them, they were just one big block of text, no spacing, no rhythm, and definitely not something you’d want to share on LinkedIn.
And if you post on LinkedIn, you know structure matters.
The platform limits you to 3,000 characters per post, and how you format your content directly impacts engagement. Posts need white space, a clear story arc, and short paragraphs that are easy to scan on mobile.
So instead of rewriting everything manually, I built a small AI content creation tool that helps me clean up my thoughts automatically.
The process is simple.
You paste your messy draft or rough story into the chat, and the GPT transforms it into a LinkedIn-ready post.
It follows a few clear writing rules:
Once it’s done, it gives you three different post versions to choose from.
So instead of spending hours re-editing, you can pick the version that fits your tone best, tweak a few sentences, and hit publish.
To show you how it works, I tested it with one of my own drafts.
It started with something like this:
“About 18 months ago, I was just another guy posting random stuff on LinkedIn…”
That sentence was buried inside a long, unformatted paragraph. It was rough and unreadable.
After sending it to the GPT, I got back three structured versions, each one with a clear hook, story, lesson, and call to action.
It took what looked like a random brain dump and turned it into something worth posting.
Of course, it’s still AI. It sometimes adds things I don’t want, like em dashes or slightly long CTAs. But fixing that is easy.
I just type:
“I like post 2. Please remove all em dashes.”
And it instantly gives me a clean version.
Same with the call to action. If it sounds too generic, I just say:
“Make the CTA shorter and more conversational.”
The GPT updates the section automatically.
So I can focus on the content itself instead of worrying about formatting details.
This little project isn’t about replacing writing. It’s about making writing faster and easier.
It helps you:
If you’re a marketer, freelancer, or creator who struggles to turn raw ideas into polished content, this GPT gives you the structure to get started. You can always adjust the tone or rewrite certain parts, but the heavy lifting is already done.
If you’d like to test it, I’ll share the link to the custom GPT for LinkedIn posts in the comments section below.
I’ll also share the document that contains all the custom GPT instructions, so you can copy it, make your own version, and adapt it to your writing style.
Once you make a copy, you can customize it freely, change the tone, adjust the structure, or add your own personal rules.
Building this GPT was a small experiment that turned into a big productivity boost.
It helps me transform random ideas into posts that actually perform well on LinkedIn, and it can help you do the same.
If you find it useful, share it with your network.
Let’s make LinkedIn a place where great ideas are shared clearly, not buried under messy drafts.
See you in the next one.
Link to the custom GPT: https://chatgpt.com/g/g-68e4c6df978c8191b57f4085ce750e6c-li-s-post-writer
Link to the Google doc with the custom instructions: https://docs.google.com/document/d/1MXEIBCXeST0dn87jkOD4LDpCQb_zv6_yoX1ywlkEXHU/edit?tab=t.0
