LinkedIn Carousel Size 2026: Dimensions & PDF Specs

The best LinkedIn carousel size is 1080 x 1350 pixels (4:5 portrait). The safe alternative is 1080 x 1080 pixels (1:1 square). Upload it as a PDF. LinkedIn accepts files up to 100 MB and 300 pages.

One rule matters more than the exact pixels. Every page must be the same size. LinkedIn's help center says PDFs with mixed page sizes must be fit to one page size before upload.

Here is something most guides skip. LinkedIn does not publish a recommended pixel size for carousels. It publishes file limits only. The 1080 px sizes are the industry standard because they match how the mobile feed displays images. We explain the reasoning below, so you can trust the numbers. (Specs checked against LinkedIn's help center, October 2026.)

What Is the LinkedIn Carousel Size at a Glance?

Here are the numbers you need. Save this table.

Spec	Value	Source
Best slide size	1080 x 1350 px (4:5 portrait)	Industry standard
Alternative slide size	1080 x 1080 px (1:1 square)	Industry standard
File formats	PDF, PPT, PPTX, DOC, DOCX	LinkedIn Help
Recommended format	PDF	LinkedIn Help
Max file size	100 MB	LinkedIn Help
Max pages	300	LinkedIn Help
Page sizes	All pages the same size	LinkedIn Help
Animations and video	Not supported, shown as static images	LinkedIn Help
Documents per post	One	LinkedIn Help

Two quick notes before the details:

"Carousel" on LinkedIn usually means a document post. You upload a file, and LinkedIn turns each page into a swipeable slide.
Carousel ads are a separate paid format. They use different specs. We cover them later in this guide.

Why Doesn't LinkedIn Publish an Official Carousel Size?

LinkedIn treats carousels as documents, not images. Its help page lists formats, file size and page limits. It never names a pixel size. That gap is why you see so many conflicting numbers online.

So where does 1080 px come from? It comes from LinkedIn's image rules. For feed images, LinkedIn recommends at least 1080 pixels wide. It supports ratios from 3:1 (wide) to 4:5 (tall). Document pages render in the same feed, on the same phones. Designers matched carousel slides to those image rules, and the convention stuck.

This matters for one practical reason. A PDF has no fixed pixel resolution. Text and vector shapes stay sharp at any size. What you control is the shape of the page, meaning its aspect ratio. Get the ratio right, keep pages consistent, and use high-resolution images. That covers almost every quality problem.

The takeaway: 1080 x 1350 and 1080 x 1080 are not arbitrary. They are the safest sizes for a feed that is mostly viewed on phones.

Square or Portrait: Which LinkedIn Carousel Dimensions Work Best?

Portrait (4:5) wins for most creators. It takes up more vertical space in the mobile feed. More space means more attention while people scroll. LinkedIn renders feed images up to a 4:5 ratio, so 1080 x 1350 is the tallest shape that fits cleanly.

Square (1:1) is the safer, simpler choice. It looks balanced on desktop and mobile. It also matches carousel ads, so you can reuse designs across organic and paid.

Factor	Portrait 1080 x 1350	Square 1080 x 1080
Mobile feed space	Largest	Medium
Desktop look	Good, slightly tall	Very good
Room for text	More vertical room	Tighter
Reuse for carousel ads	No, ads need 1:1	Yes
Best for	Step-by-step guides, frameworks, lists	Quotes, stats, visual summaries

What about landscape (16:9)? It uploads fine. Exported slide decks often use it. But it looks small on a phone. Text shrinks and readers have to zoom. Avoid landscape unless your audience is mainly on desktop.

Our verdict: design at 1080 x 1350 unless you also plan to run the same slides as ads.

What Are the LinkedIn Carousel Specs for File Format, Size and Pages?

LinkedIn's help center lists the official document rules. Here they are in plain terms.

Formats: PDF, PPT, PPTX, DOC and DOCX.
Best format: PDF. LinkedIn advises converting to PDF for the highest-quality upload.
Size limit: 100 MB per file.
Page limit: 300 pages.
One file per post: combine assets into one document first.
Layered PDFs: flatten or merge them before upload.
No motion: videos and animations display as static images.
No edits after posting: you can edit the caption, but not the document.
Downloads: viewers can download your document as a PDF, for accessibility.

That last point surprises people. Anyone who can see your post can download the file. Don't upload anything you would not hand out.

Why PDF over PowerPoint? LinkedIn converts PPT and DOC files during upload. Fonts can shift. Layouts can break. A PDF locks your design in place. Export to PDF every time.

Keep files light, too. The limit is 100 MB, but smaller files load faster on mobile data. A 10-slide carousel rarely needs more than 10 MB. Compress large photos before export.

Can You Upload an A4 or US Letter PDF as a LinkedIn Carousel?

Yes, LinkedIn accepts it. But it is rarely the best choice. A4 is the default page size in Europe and much of the world, so this happens often.

Here is the problem. A4 portrait is much taller and narrower than 4:5. Its ratio is about 1:1.41. US Letter is about 1:1.29. Both are taller than the 4:5 shape the feed is built around. The page displays smaller, and text designed for print becomes hard to read on a phone.

Landscape A4 has the opposite issue. It is wide, so it shows up small in the mobile feed.

Page size	Approx. ratio	Mobile result
1080 x 1350 px	4:5	Fills the feed cleanly
1080 x 1080 px	1:1	Clean and balanced
US Letter portrait	1:1.29	Taller than ideal, smaller text
A4 portrait	1:1.41	Taller than ideal, smallest text
A4 / 16:9 landscape	1.41:1 / 1.78:1	Small in the feed

When is A4 fine? When you are sharing a real report or one-pager that people will download and read later. When you want swipeable slides in the feed, resize to 1080 x 1350 first.

What Are the Safe Zones and Minimum Font Sizes for LinkedIn Carousels?

LinkedIn publishes no official safe zone or minimum font size for document posts. So treat every number you see as a guideline, including ours.

Here is the practical rule we use on a 1080 px-wide slide:

Margins: keep text at least 60 to 80 px from every edge.
Bottom edge: leave extra room. Page counters and controls can sit near the bottom on some devices.
Headlines: 60 px or larger.
Body text: 32 px or larger.
Words per slide: aim for 30 or fewer.
Contrast: dark text on light backgrounds, or the reverse. Avoid low-contrast pastels.

Why so large? A 1080 px slide shrinks to about a third of that width on a phone. Text that looks fine on your monitor becomes tiny in the feed.

The best test is free. Export the PDF, send it to your phone, and open it at full screen width. Can you read every word without zooming? If not, increase the size. That five-second check beats any spec sheet.

How Do You Export a Carousel at the Right Size?

Set the page size before you design, not after. Resizing finished slides breaks layouts. Here is how to do it in the most common tools.

Canva

Click Create a design, then Custom size.
Enter 1080 x 1350 px (or 1080 x 1080 px).
Design one page per slide.
Click Share, then Download, and choose a PDF format.

PowerPoint

Go to Design, then Slide Size, then Custom Slide Size.
Set a 4:5 shape, such as 8 x 10 inches, or a square such as 10 x 10 inches.
Export with File, then Save As or Export, and pick PDF.

PowerPoint works in inches, not pixels. That is fine. In a PDF, the ratio matters, not the unit.

Google Slides

Open File, then Page setup, then Custom.
Choose pixels and enter 1080 x 1350.
Download with File, then Download, then PDF document.

Figma

Create one frame per slide at 1080 x 1350.
Select all frames in order.
Use Export frames to PDF from the main menu.

Keynote

Open the Document sidebar and set a custom slide size of 1080 x 1350.
Export with File, then Export To, then PDF.

Want to skip setup entirely? ContentIn's free LinkedIn carousel generator starts at the right dimensions, so you design once and export a ready PDF.

How Many Slides Should a LinkedIn Carousel Have?

LinkedIn allows up to 300 pages. You should use far fewer. There is no official best number, but most effective carousels land between 5 and 12 slides.

Here is a structure that works for most topics:

Slide 1, the hook: one bold promise or question. This is your cover.
Slide 2, the setup: why this matters to the reader.
Slides 3 to 9, the value: one idea per slide.
Second-to-last, the summary: the key takeaway in one line.
Last slide, the call to action: follow, comment, save or visit.

Why keep it short? Every extra slide is another chance to lose the reader. Tight carousels also feel easier to start. Readers glance at the page count before swiping.

Your first slide does most of the work. It has to stop the scroll on its own. Treat it like a headline, and keep it to a few words. Our guide to hook writing covers how to make that first line land.

Need ideas for what to put inside? Our post on LinkedIn carousel posts covers formats and topics that work well.

How Are LinkedIn Carousel Ads Different From Carousel Posts?

This is the most common mix-up in carousel guides. Organic carousels and carousel ads share a name. They do not share specs.

Carousel ads are paid Sponsored Content, built in Campaign Manager. They use individual images, not a PDF. Each image is a "card." Here are LinkedIn's official ad specs:

Spec	Carousel post (organic)	Carousel ad (paid)
File type	One PDF, PPT, PPTX, DOC or DOCX	Separate JPG or PNG cards
Size	1080 x 1350 or 1080 x 1080 (convention)	1080 x 1080, 1:1 (recommended)
Count	Up to 300 pages	2 to 10 cards
File limit	100 MB per document	10 MB per card
Max image size	Not published	4320 x 4320 px per card
Text	Post caption up to 3,000 characters	Intro text up to 255 (150 to avoid truncation)
Card headline	None	45 characters
Links	Inside the PDF only	Each card can link to its own URL
Video	Not supported	Not supported

Two practical tips follow from this:

Design organic slides square if you might promote them as ads later.
Carousel ad cards cannot be edited after you save the ad. Check them before saving.

There is also a third format people call a carousel: the multi-image post. You can add up to 20 images, but LinkedIn shows them as a grid, not swipeable slides. If you want swiping, use a PDF.

What Are the Most Common LinkedIn Carousel Size Mistakes?

Most carousel problems come from a handful of avoidable errors. Check this list before you post.

Mixed page sizes. One odd page breaks the set. LinkedIn requires a single page size.
Uploading PowerPoint instead of PDF. Fonts and spacing can shift during conversion.
Designing in landscape. Slide-deck defaults are 16:9. That shape looks small on a phone.
Print-sized text. Body text sized for paper is unreadable in the mobile feed.
Text too close to the edges. Leave margins so nothing feels cramped or cut off.
Low-resolution images inside the PDF. Photos look blurry after LinkedIn processes the file.
Layered PDFs. Flatten them, as LinkedIn requires.
Animated slides. Animations don't play. Each page shows as a still image.
A weak first slide. The cover decides whether anyone swipes.
Reusing organic slides as ads without checking. Ads need 1:1 JPG or PNG cards.

The quickest safety net is a phone preview. Open your exported PDF on a phone before posting. You will spot size, margin and font problems in seconds. For text posts, our LinkedIn post preview tool shows how your caption will look on mobile and desktop.

How Does Carousel Size Compare to Other LinkedIn Post Specs?

Carousels are one of several LinkedIn formats, each with its own rules. Here is how they compare.

Format	Recommended size	Key limit
Carousel (document post)	1080 x 1350 or 1080 x 1080	100 MB, 300 pages
Single image	1080 x 1350 or 1080 x 1080	Ratio 3:1 to 4:5
Multi-image	Same as single image	Up to 20 images
Video	1080p, square or vertical for mobile	15 min desktop, 10 min mobile
Link preview	1200 x 627 (1.91:1)	Set via Open Graph tags

Notice the pattern. LinkedIn favors portrait and square shapes for anything you upload. The only wide format is the link preview, which comes from your website, not from you.

For the full breakdown of image, video and document specs, see our LinkedIn post size guide. If your caption is the problem, our guide to the LinkedIn post character limit explains why your count may not match LinkedIn's.

Which Tools Create Correctly Sized LinkedIn Carousels?

Any tool that exports a PDF can make a LinkedIn carousel. The difference is how much setup you do yourself.

Design tools (Canva, Figma, Adobe Express): full creative control. You set the size and layout manually.
Presentation tools (PowerPoint, Keynote, Google Slides): familiar and fast. Change the default 16:9 size first.
Dedicated carousel generators: start at the right size and often write the slide copy too.

Which should you choose? If you have a designer or brand kit, use a design tool. If you post carousels weekly and want speed, a generator saves the most time.

ContentIn's free LinkedIn carousel generator turns your idea into slides at LinkedIn-ready dimensions. Inside the ContentIn app, AI carousels sit next to your AI Ghostwriter, scheduler and analytics, so the carousel and its caption come from one place.

Comparing options? Our roundup of the best LinkedIn carousel generators tests nine tools on output quality, sizing and price.

Frequently Asked Questions About LinkedIn Carousel Size

What is the best LinkedIn carousel size?

1080 x 1350 pixels (4:5 portrait) for most posts. It fills the most space in the mobile feed. Use 1080 x 1080 (1:1) if you want a balanced look or plan to reuse slides as ads.

What are the LinkedIn carousel dimensions for a PDF?

Set every PDF page to the same size, ideally a 4:5 or 1:1 shape such as 1080 x 1350 or 1080 x 1080. LinkedIn requires one consistent page size across the file.

What are the official LinkedIn carousel specs?

LinkedIn's help center lists PDF, PPT, PPTX, DOC and DOCX, up to 100 MB and 300 pages. It recommends PDF. It does not publish an official pixel size.

Can I upload a PowerPoint file as a LinkedIn carousel?

Yes. But LinkedIn converts it during upload, and fonts or layouts can shift. Export to PDF first for reliable results.

Does LinkedIn compress carousel PDFs?

LinkedIn processes each page for display, and photos can lose sharpness. Use high-resolution images and clean vector text to keep slides crisp.

Is the carousel ad size the same as a carousel post?

No. Carousel ads use 2 to 10 separate JPG or PNG cards, recommended at 1080 x 1080, with a 10 MB limit per card.

How many slides can a LinkedIn carousel have?

Up to 300 pages. Most effective carousels use 5 to 12 slides.

Can I edit a carousel after posting?

You can edit the caption. You cannot replace or edit the document. To change slides, delete the post and upload again.

Ready to Make Your First Correctly Sized Carousel?

Getting the size right takes five minutes. Set your canvas to 1080 x 1350, keep every page the same, export a PDF, and test it on your phone. Then put your energy into the hook and the content.

If you'd rather skip the setup, try ContentIn's free LinkedIn carousel generator. It handles the dimensions, so you can focus on what your slides say.

LinkedIn Carousel Size 2026: Exact Dimensions, PDF Specs & Safe Zones