Free LinkedIn post generator: Turn one article into 3 LinkedIn posts and a ready-to-post carousel

What is a LinkedIn post generator?

A LinkedIn post generator is a tool that writes LinkedIn posts from a source you give it. With Mark AI, that source is a blog article, and the output is 3 posts plus a carousel.

You start with content you already wrote. The AI LinkedIn post generator reads it, finds the key ideas and rewrites them for the feed. It keeps your facts and your examples, and it adds no numbers, names or studies.

This changes how you use your blog. Take a 1,500-word guide on email prospecting: it becomes 3 posts and an 8-slide carousel, which gives you weeks of LinkedIn content from a single piece. The tool also adapts the voice. If a person posts, the copy says "I." If a company page posts, it says "we."

LinkedIn carousel vs. text post: which one to use

Pick the format based on what you want to say. A text post works well for an opinion, a story or an announcement. A LinkedIn carousel works better for a method, a list of steps or a comparison.

Does your article list 5 tips? Make a carousel. Does it argue a position? Write a text post instead. You can also use both: post the carousel with the full method, then follow up a few days later with a text post on the strongest idea.

LinkedIn carousel format

A LinkedIn carousel is a PDF document that readers swipe through, 1 page at a time. LinkedIn calls it a document post. Each page of your PDF becomes a slide in the feed.

Dimensions

LinkedIn publishes no official page size for documents. It only requires every page of the PDF to share the same size. The 1080 × 1350 pixel portrait format is a common choice, because it takes up more of a phone screen. The 1080 × 1080 square also works. Pick one size and keep it on every slide.

Number of slides

LinkedIn accepts up to 300 pages, but nobody reads 300 slides. Plan 1 slide per idea, then add a cover and a closing slide. For a blog article, 8 slides usually cover it: 6 ideas in the middle, and the message stays focused.

PDF file rules

• File type: PDF is recommended, though LinkedIn also accepts PPT, PPTX, DOC and DOCX.
• File size: 100 MB maximum.
• Pages: 300 maximum, all the same size.
• Title: LinkedIn asks you to give the document a title when you post it.
• Edits: once the post is live, you can't swap the document for a new one.

So proofread every slide before you upload. If you spot a typo later, you have to delete the post and publish it again.

Text per slide

Aim for a short headline and 1 to 3 sentences per slide. Open the PDF on your phone before posting. If you need to zoom in to read it, make the text bigger or cut it.

How to turn a blog post into LinkedIn posts in 6 steps

Content repurposing means taking 1 piece of content and adapting it for each channel. Your blog article already holds the material for your LinkedIn posts and your carousel. You just need to break it down.

1. Pick the right article. Guides, methods and tip lists split easily into posts and slides.
2. Find 6 key ideas. Rewrite each one as a single sentence. Keep the article's numbers and examples, and add none.
3. Write a hook for each post. It must fit in the 2 lines readers see before "see more."
4. Choose 3 angles. Write 1 post with the key ideas as a list, 1 with a point of view and 1 with a story.
5. Build the carousel. Write a cover, 1 slide per key idea and a closing slide with a call to action.
6. Export the PDF and schedule everything. Post the carousel as a document, then spread the 3 posts over the following weeks.

Mark AI's LinkedIn carousel generator handles steps 2 to 5 for you. Enter the article URL, and you get the 3 posts and the 8 slides in under a minute. You keep control of step 6 and decide when each piece goes live.

LinkedIn carousel example, slide by slide

Take a fictional article titled "What to do after your webinar ends." Here is the 8-slide carousel you could build from it.

The cover names a clear moment and promises a set number of ideas. Each idea slide starts with a verb and fits in 2 sentences. The last slide asks a question, so readers have a simple reason to comment.

How to write a LinkedIn post people read to the end

The hook

LinkedIn cuts long posts after the first lines and shows "see more." Readers decide right there whether they click. So your hook has to work in those first 2 lines. These 3 types of hooks give people a reason to keep reading:

• a direct question: "How long did your last webinar replay sit in your drafts folder?"
• a claim from the article: "The week after your webinar matters more than the webinar itself."
• a scene: "On Tuesday, our sales team called 12 attendees before lunch."

Skip vague openers like "Some thoughts on marketing." They don't tell readers what they will get.

The structure

• Write 1 idea per line.
• Leave a blank line between blocks.
• Switch to a list as soon as you list things.
• Stay under LinkedIn's limit of 3,000 characters.

The generator shows the character count for each post, so you see right away if you need to cut.

The call to action

End with 1 action only. Ask a question, point to the full article or invite readers to download the carousel. When you ask for 3 things, people often do none of them.

The hashtags

Add 3 hashtags tied to the topic. Mix a broad one, a job-related one and a specific one, such as #Marketing, #B2BMarketing and #ContentMarketing.

3 LinkedIn post ideas from one article

Running out of LinkedIn post ideas? Look at your blog. One article can feed several posts if you change the angle each time. Mark AI's generator writes 1 post for each of the 3 angles below.

Angle 1: the key ideas as a list

This post sums up the article in a few points. It fits guides and how-to content.

Angle 2: a point of view from the article

This post defends 1 idea from the article. It invites reactions, because readers can agree or push back.

Angle 3: a story or an example

This post tells a concrete situation from the article. Readers recognize themselves first, then discover the fix.

Post these 3 a few days apart, then publish the carousel. One article can keep your page active for several weeks.

Create your posts and carousels with Mark AI

The free tool works in 3 steps:

1. enter the URL of a blog article, or paste its text;
2. choose who posts: a person writing "I" or a company page writing "we";
3. get your 3 posts and your carousel.

Mark reads the article and pulls out the key ideas without inventing anything. You copy each post in 1 click. The 8-slide carousel downloads as a PDF, ready to post as a LinkedIn document. The tool is free and needs no sign-up.

In the Mark AI platform, an agent trained on your voice writes your LinkedIn posts every week, from your articles and your documents. The same article also becomes posts for X, Instagram and your newsletter. Your team approves every piece before it goes live.

How to apply this today

1. Pick a blog article that contains a method or a list of tips.
2. Enter its URL into the generator and choose who posts.
3. Read the 3 posts and keep the hook that sounds most like you.
4. Open the PDF on your phone, then post the carousel as a document.
5. Schedule the other 2 posts over the next 2 weeks.

LinkedIn post generator FAQ