What aspect ratio works best for LinkedIn carousels?

4:5 portrait at 1080 x 1350 px is the standard working canvas. This matches LinkedIn's feed render and provides sharp rendering on retina displays. Square 1:1 works too but takes less vertical feed space.

How many slides should a LinkedIn carousel have?

8-12 slides is the sweet spot. Fewer than 8 and the format does not earn its scroll-stopping reward; more than 12 and most users drop off before the conclusion. Always include a strong cover (slide 1), a frame slide (slide 2), and a CTA slide at the end.

What file format does LinkedIn support for carousels?

LinkedIn supports PDF, DOCX, and PPTX for document posts. PDF is the standard for designed carousels because it preserves typography reliably. Always embed fonts when exporting.

How do I make a strong cover slide?

The cover should state the topic in one short headline, promise something concrete (e.g., '5 mistakes', '3 frameworks'), and include a 'swipe' visual cue. Author name in small text at the bottom. The cover slide should be readable at thumbnail-feed scale, not just full-screen.

When should I publish a LinkedIn carousel?

Tuesday-Thursday between 8am-10am in the publisher's timezone is LinkedIn's typical B2B engagement peak. Carousels benefit from morning publishing because they take longer to consume than text posts; mornings give users more time to engage.

LinkedIn Carousel PDF Mockup Tutorial (2026)

Why LinkedIn carousels became the dominant B2B format

LinkedIn carousels — uploaded as PDF documents and rendered in the feed as scrollable slides — are one of the highest-engagement post formats on LinkedIn. The reason is simple: the carousel format gives the user a tactile, swipeable interaction inside the feed, which holds attention longer than a static image post.

LinkedIn's Help Center documentation on document posts confirms that PDF, DOCX, and PPTX are supported document formats; PDF is the standard for designed carousels.

This tutorial is the workflow I use for client carousels. The goal: a polished, consistent, mobile-readable carousel that maps cleanly to LinkedIn's actual rendering.

Step 1: Decide the slide count and the cover slide goal

LinkedIn carousels work best at 8-12 slides. Fewer than 8 and the format does not earn its scroll-stopping reward; more than 12 and you lose the user before the conclusion.

The cover slide (slide 1) carries 70% of the success or failure. It needs to do three things in two seconds:

State the topic or problem clearly.

Promise something concrete (a framework, a list, a counter-intuitive insight).

Hint at the payoff that justifies the swipe.

A common cover-slide template that I use:

Top third: a strong statement or question.

Middle third: a number or callout that signals depth (e.g., "5 mistakes," "3 frameworks," "the one rule").

Bottom third: a small "swipe" cue and the author's name.

Step 2: Set up your source canvas at 4:5 portrait

LinkedIn renders carousels in the feed at approximately 4:5 portrait. The standard working canvas is 1080 x 1350 px. Designing at this dimension ensures sharp rendering on retina displays without bloating the file size.

Tools I use for the source: Figma (best for collaboration), Adobe Illustrator (best for typography control), or Canva (best for fast iteration). All three export to PDF.

Step 3: Build the slide structure

A carousel works because of structure, not content density. The structure I default to:

Slide 1: Cover (hook).

Slide 2: The frame ("Here is what we will cover").

Slides 3-9 (or 3-11): One concept per slide. Each slide should have a single takeaway, not a wall of bullets.

Slide 10 (or 12): Summary recap.

Slide 11 (or 13): Call to action ("Save this, follow me, comment").

The most common mistake: trying to put too much on each slide. Each slide is a single message. If a slide needs two bullets, it is two slides.

Step 4: Apply consistent typography

Carousel coherence comes from typography consistency. The same heading font, the same body font, the same size hierarchy across all slides. The user's eye is comparing slide N to slide N-1; inconsistency reads as sloppy work.

I use:

Heading font: a sans-serif with strong weight options (e.g., Inter, Söhne, or Montserrat). Bold weight for slide title.

Body font: typically the same family at a lighter weight, or a complementary serif for contrast.

Size hierarchy: title 56-72px on the canvas, body 28-36px. Anything smaller becomes unreadable on mobile.

Step 5: Mock up the carousel in a LinkedIn feed preview tool

Once the slides are designed, the next test is whether they work in the LinkedIn feed context. AIPostMockup's LinkedIn carousel mockup tool lets you preview how the slides will look as a swipeable feed item, with the LinkedIn lower UI overlay (likes, comments, share) visible.

This catches several common issues:

Text near the slide edge that the LinkedIn UI overlays.

Cover slide that does not contrast with the LinkedIn feed background.

Inconsistent slide-to-slide transitions.

Cover hook that works in isolation but loses impact next to the LinkedIn feed elements above and below it.

Step 6: Verify mobile rendering

LinkedIn carousels are most-consumed on mobile. The mockup should be checked at iPhone-13-screen-size (approximately 6.1 inches diagonal) and at smaller Android phone sizes (some users still on 5.5-inch displays).

What to verify:

Title is readable without zoom.

Body text is readable.

The "swipe to next" cue is visible.

The cover hook is sharp at thumbnail-feed scale (LinkedIn shows the cover smaller than full-screen until the user taps it).

Step 7: Export as PDF

The export settings matter. I use:

Format: PDF (LinkedIn supports DOCX and PPTX too, but PDF preserves typography most reliably).

Compression: Standard or High (not Maximum — the file becomes too large).

Embed fonts: Yes (essential).

Page size: matches the source canvas (1080 x 1350 px / approximately 4.5 x 5.625 inches).

LinkedIn allows file sizes up to 100 MB for documents. Most well-designed carousels weigh in at 2-5 MB.

Step 8: Compose the LinkedIn post text

The carousel is uploaded as a document attachment. The post text appears above the carousel in the feed. The post text should do two things:

Hook the user with a different framing than the cover slide (do not repeat the cover slide text verbatim).

Make the user want to swipe.

A common approach: the post text presents the "why this matters" while the cover slide presents the "what." Together they create a stronger hook than either alone.

Step 9: Attach to the approval ticket with the mockup screenshot

For client work, the approval package should include:

The PDF source.

The mockup screenshot showing the carousel in LinkedIn feed context.

The drafted post text.

The targeted publish date and time.

This makes review fast: the client can comment on the cover, swipe through, read the text, and approve or request changes in a single review session.

Step 10: Plan the publish for engagement window

LinkedIn engagement peaks Tuesday-Thursday between 8am-10am in the publisher's timezone (per LinkedIn's own marketing-solutions data on B2B engagement patterns). Carousels especially benefit from morning publishing because they take longer to consume than text posts; users are more likely to engage in the morning when they have time.

Common mistakes

Slides that try to fit too much (each slide is one takeaway, not three).

Inconsistent typography across slides.

A weak cover slide that promises nothing.

Skipping the mobile mockup verification step.

Exporting at too-low compression and getting a 50 MB file that LinkedIn handles slowly.

Re-publishing a carousel in the same week (the LinkedIn algorithm favours novelty).

What we noticed during testing

We built and tested this workflow on three sample carousels during May 4-5, 2026. The biggest lesson: cover slide quality matters more than slide-by-slide quality. A carousel with a strong cover and decent middle slides outperforms a carousel with a weak cover and beautiful middle slides. The audience must be persuaded to swipe before they ever see slide 5.

Disclaimer

LinkedIn's product changes. Verify the current document size and format limits at the LinkedIn Help Center before high-value work. AIPostMockup is not affiliated with LinkedIn.