LinkedIn Document Posts: The Complete Guide (2026)

People keep searching for a “LinkedIn carousel” tool and getting confused, because LinkedIn never shipped one. What everyone calls a carousel is actually a document post. Once you understand that single fact, the whole thing gets simple: there is no special creator to learn, just a file to make.

What a document post actually is

A LinkedIn document post is exactly what it sounds like. You upload a multi-page PDF, and LinkedIn renders it as a swipeable carousel in the feed. Each page of the PDF becomes one slide people tap or swipe through. That is the entire mechanism.

This matters because of what it rules out. There is no separate native carousel creator on LinkedIn, the way Instagram lets you select multiple images. You do not add slides inside the post composer. You build the design somewhere else, export it as one PDF, and the PDF is the carousel. Get the file right and you are done.

The specs that matter

You only need to lock two things before you design: the ratio and the rule of one page per slide.

Portrait 4:5 (1080x1350) is the safe default

Most of your audience scrolls on a phone, and portrait claims more vertical space than square, which means a bigger tap target and more room for a hook. That is why 1080x1350 is the default most people should reach for.

Square 1080x1080 also works

Square is a balanced, safe choice that reads cleanly on desktop and mobile, it just takes less vertical real estate than portrait. Pick one ratio and keep every page identical so the carousel does not jump between shapes as people swipe. For the full breakdown of dimensions and file limits, see our LinkedIn carousel size guide.

Why document posts earn reach

A document post asks for more than a glance. People tap through several pages, which holds attention longer than a single image, and a deck worth keeping invites a save. That behaviour, dwell time plus saves, is exactly what tends to travel on a professional feed.

It also suits B2B better than almost any other format. A frameworks, a checklist, a teardown, a before and after: these reward reading, and your audience came to LinkedIn to learn something useful. If you want the deeper version of why this works and how to lean into it, read how LinkedIn carousels earn reach.

How to make one, step by step

The workflow is four steps, and only the first one takes real thought.

1. Design the slides. Build your deck at 1080x1350 (or 1080x1080), one idea per page, big type, few words. Treat the first page as the hook.
2. Export as a multi-page PDF. Combine every slide into a single PDF with one slide on each page. This is the format LinkedIn expects, so the export step is where tools either help you or get in your way.
3. Upload as a document. Start a post, click the document icon, select your PDF, and give it a short title. LinkedIn turns the pages into the swipeable carousel.
4. Write the post. Add a caption that earns the click, then publish.

Supaslides handles the part that usually trips people up. Paste a URL and it builds an on-brand theme, Claude writes the copy and picks a layout per slide, and you can export a LinkedIn-ready PDFdirectly, one page per slide, in exactly the format the document post uploader expects. No separate “merge to PDF” detour.

Make the first page do its job

In the feed people see one thing: page one. It carries the whole post. So spend a disproportionate amount of care on the cover, because if it does not earn the first swipe, nothing else you wrote matters.

For B2B, structure beats cleverness. State a clear, specific promise (what the reader will walk away knowing), hint at the payoff, and make the design clean enough to read at thumbnail size. Then let the rest of the deck deliver in order. For openers that pull professionals into the swipe, see our LinkedIn carousel hooks.

The takeaway

A LinkedIn carousel is a document post, and a document post is a multi-page PDF. There is no hidden creator and no trick: design clean slides at 4:5 or 1:1, export one page per slide, upload as a document, and write a caption that earns the click. Get the format right once and you can ship these on repeat.