LinkedIn carousel dimensions, aspect ratio, and specs (2026)

A LinkedIn carousel is a document post. LinkedIn paginates the file. The pixel size of each page is a choice you make before you design, and it is the choice that decides whether the type is readable on a phone. In 2026 the two canvases that hold up in the feed are square, 1080 by 1080 (1:1), and portrait, 1080 by 1350 (4:5). Boykli renders those two and stops there.

LinkedIn Help, "Upload and share documents on LinkedIn," states the file ceiling: 100 MB and 300 pages. Supported types are PPT, PPTX, DOC, DOCX, and PDF. That article does not publish a required pixel size. A 1920 by 1080 slide deck still uploads. On a phone it is a short strip. A 1080 by 1920 story frame still uploads. The feed was not built as a vertical video player for documents. The spec that matters is the one the reader can see.

This page is the measurement. How a topic becomes the PDF is LinkedIn carousel generator. How a Canva file of the same ratios reaches LinkedIn is Canva vs a dedicated LinkedIn carousel generator.

What LinkedIn actually constrains

The published limits are about the file, the post text, and what you can change later.

Three hundred pages is a ceiling for a leave-behind. A swipe in the feed is a cover plus a handful of claims. Boykli stops the form at 8. A 20-page deck is a slides export you upload yourself.

One document per post. After it is live, a typo on slide 4 is a new post. The first page is the cover people see before they swipe, so the ratio decision is a cover decision.

The ratio math

These are the sizes people put in a search box, and what each one does on a phone.

Portrait is square plus 270 pixels of height (1350 − 1080). That 270 pixels is the entire reason to pick 4:5: a second sentence, a label, or a stat that still sits above the bottom safe zone. It is the same 4:5 ratio people already use for a portrait image. The width stays 1080 so a headline set at 56 pixels stays a headline.

1080 ÷ 1350 = 0.8, which is 4 ÷ 5. 1080 ÷ 1080 = 1. A template named "LinkedIn portrait" at 1200 × 1500 is also 4:5, and LinkedIn will take it, because pixel size is not the gate. Boykli standardizes on 1080 so the type ramp below is one ramp, on one canvas, for every design.

A PowerPoint default of 13.333 by 7.5 inches (widescreen 16:9) exports a landscape page. Resize the slide master before you design. Stretching a finished 16:9 master into 4:5 reflows every box. The same warning is in the Canva comparison: set the custom size first.

What the Boykli canvas locks

The carousel page asks for Square (1:1) or Portrait (4:5) before it creates. The PDF page format is that canvas in pixel units: [1080, 1080] or [1080, 1350]. The renderer also screenshots at 2× so the type is sharp, and it draws that bitmap back into the same 1080-wide page. A "retina" export is still a 1080-wide page. It is a sharper picture of the same layout.

Each slide is a fixed frame:

.slide {
  width: 1080px;
  height: 1080px; /* 1350px on portrait */
  margin: 0;
  padding: 60px;
  box-sizing: border-box;
  overflow: hidden;
}

box-sizing: border-box means the 60px padding sits inside the 1080, so the type column is 960 pixels wide. Overflow is hidden. A line that does not fit is clipped, which is why the density cap exists.

The type ramp is the same on both ratios, because both are 1080 wide:

At 21px, body type is large enough to read when the 1080 page is scaled down to a phone column. A 14px caption that looks refined on a laptop becomes a gray smear in the feed. The prompt refuses to shrink body type to fit a sixth bullet. Split the list across slides instead. How an outline becomes that slide count is on PDF to LinkedIn carousel.

Split-Screen is the design that changes the column math. The slide stays 1080 wide and the padding on the slide itself is cleared. Two columns each take 50% of the width, and each column has its own 60px padding. The text in one column is about 420 pixels wide (540 − 120). A headline written for the full 960-wide column will wrap hard in a split. Pick Split-Screen when each side is a short label, a number, or one sentence.

The 220px safe zone

The cover keeps its headline, subheading, and subtitle out of the bottom 220 pixels. That band is empty on purpose. When a brand kit is on, the server injects the logo, the handle, and the profile photo into the bottom corners. Copy that sits in that band collides with the strip.

On a square slide, 220 pixels is about a fifth of the height (220 / 1080). On portrait it is about a sixth (220 / 1350). Portrait does not remove the band. It adds 270 pixels above it. The extra room is for the argument, and the strip still owns the floor.

Brand kit lives on the carousel page: canvas color, accent, logo, profile photo, handle, and toggles for the author strip and the logo. Save the kit before you create. An unsaved color change blocks the button. If brand colors are on, the only design available is Normal. The other seven stay disabled until brand colors are off. The designs are Neo-Brutalist (the default), Bauhaus, Retro Terminal, Infographic / Data Guide, Bold & Edgy, Creator Gradient, Split-Screen, and Normal.

Slides are HTML and CSS: type, shapes, gradients, and SVG. A photograph is a different file, a single image post, with its own aspect handling. A document post from this generator does not place a product photo on the page.

Which ratio for which argument

Pick the ratio from the shape of one slide, then keep it for the whole file.

Use portrait, 1080 × 1350, when a slide is a label plus two lines, or a step with a consequence. The support-memo example on the PDF page is this case: each step is two short lines, so the canvas is portrait. The inner box is 960 × 1230. The cover still keeps the bottom 220 pixels clear, and the top padding is 60, so the stack above that floor is about 1,070 pixels (1350 − 60 − 220). That is a heading, two lines, and air.

Use square, 1080 × 1080, when the slide is one card: a single sentence, a single contrast, a single number. The inner box is 960 × 960. A five-bullet checklist on that square forces the type toward the 21px floor. Move the fifth bullet to the next slide, or switch the deck to portrait and keep the checklist to four cards.

Use a landscape file only when the artifact is already a presentation and the audience expects to open it. The feed preview will be short. If the point of the post is the swipe, rebuild the pages at 4:5 or 1:1. Canva will let you start at 16:9. Boykli will not offer that shape.

A 9:16 page is a story or a short video frame. LinkedIn document posts are not that surface. The extra 570 pixels under a 4:5 page (1920 − 1350) mostly add empty floor or type that the first frame of the viewer crops out of the glance. Standardize on 4:5 when you want height.

Page count follows the outline, inside 2 to 8:

Eight is a ceiling. A cover that repeats the caption, then six slides that repeat the cover, fails at any pixel size.

A spec workflow you can run on one outline

Use this note. It is short, and every number in it is a size, so a tool that invents a metric is easy to catch.

Cover: the carousel that survives a phone. Slide 2: 1080 by 1350, one idea. Slide 3: body type at 21px or larger. Slide 4: the bottom 220px stays empty. Slide 5: the same size on every page. Close: set the canvas before you write the line. No extra stats.

That is six slides. Portrait. Nothing in it is a vanity metric.

1. Choose the shape from the note. Each middle slide is a rule plus a number, so the canvas is portrait, 1080 × 1350. Square would clip the second line or push it into the safe zone.
2. On the carousel page, paste the note into the topic. Stay under 2,000 characters. This note is far under. Name the slide count in the topic so the model has an outline, and set the control to the same number.
3. Tone: Normal. Humor would treat the spec as a joke.
4. Slide count: 6. The form allows 2 through 8. The default is 5. The API clamps the same range. If the model returns fewer .slide blocks than you asked for, the page tells you the count it got. Post that shorter deck or create again.
5. Design: Infographic / Data Guide for a sequence of measurements. Neo-Brutalist if you want it less like a report. Split-Screen is the wrong design here. A 420-pixel column is too narrow for "1080 by 1350, one idea" set as a headline. If brand-kit colors are on, switch the design to Normal or turn brand colors off.
6. Model: Grok 4.6 is the default. The picker also offers Gemini 3.5 Flash, Claude Sonnet 5, and GPT-5.6 Terra. The selected model is the model that runs.
7. Create. A large deck can take a few minutes. The page stops the attempt at about eight minutes.
8. Read every slide against the note and against the ramp. Body under 21px, a sixth bullet, a headline in the bottom 220px, or a page that is not 1080 wide is a failed deck. Boykli's renderer forces the frame back to 1080 × 1350, and overflow hidden will clip whatever did not fit. Change the topic and create again. That is a new carousel generation. On Managed, generations count. Reading the preview does not.
9. Check the PDF page size before you publish. Portrait pages are 1080 by 1350. Square pages are 1080 by 1080. Every page matches. A six-page type deck is nowhere near 25 MB, and nowhere near LinkedIn's 100 MB.
10. Set the document title, up to 120 characters. LinkedIn shows it as the name of the PDF. Write the caption, up to 3,000 characters. The title is required when you add the PDF to the queue.
11. Download, post now, or queue. Publishing uses the personal profile from LinkedIn OAuth. Company pages are outside the product. The queue takes the next open slot you configured. It does not resize the PDF on the way out.

The file you publish is that PDF. A Canva export at the same pixel size is a different file with the same page geometry. A Canva export at 1920 × 1080 is a different geometry, and the feed will show it.

DPI, and the other number people mix in

1080 × 1350 is a screen canvas. At 72 pixels per inch it is a 15 by 18.75 inch page, which is a meaningless print measurement, because nobody prints the feed. At 300 dpi the same physical phone-sized card would be thousands of pixels on a side and a much heavier PDF. LinkedIn is compressing a document for a screen. Build at 1080 on the long side of the width, in pixel units, and leave the print DPI setting alone.

The file Boykli actually writes is measured on LinkedIn PDF slide dimensions. A portrait page has a MediaBox of 810 by 1012.5 points, 11.25 by 14.0625 inches, because CSS pixels are mapped at 96 per inch. The 15 by 18.75 inch figure is the other convention: one CSS pixel treated as one PDF point. Both are 4:5. The cheat sheet is the point, inch, and millimeter reading of the file.

PDF Standard is the export people use when the file comes from a design tool. PDF Print is for paper. Print exports are heavier and sometimes substitute fonts. The Canva page covers that handoff. Boykli's download is already the screen PDF. You do not pick a DPI in the carousel form.

Image-post sizes are a different spec. A single image, a link thumbnail, and a document page do not share one pixel recipe. Searching "LinkedIn image size" and applying 1200 × 627 to a carousel produces a landscape document page. That number is a link-preview habit. The carousel number for a phone is 1080 × 1350 or 1080 × 1080.

FAQ

What is the LinkedIn carousel size in 2026?

For a document you want people to swipe on a phone, use 1080 × 1350 (4:5) or 1080 × 1080 (1:1). LinkedIn's document help article caps the file at 100 MB and 300 pages and lists PPT, PPTX, DOC, DOCX, and PDF. It does not require those pixels. Boykli renders only those two sizes, one size for every page in the deck.

Does LinkedIn crop a square PDF into portrait?

The page size you export is the page size of the document. A square page stays square. A portrait page stays portrait. The feed shows the first page as the cover and lets people paginate. A 16:9 page stays 16:9, which is why the type looks small. Boykli does not letterbox one ratio into the other. You pick the ratio, then the PDF is built at that size.

Can I upload a 1920 × 1080 PowerPoint?

Yes. Widescreen PPTX is an allowed type, and 16:9 is under the 300-page and 100 MB caps for any normal deck. The preview in the feed is a short strip. If the swipe is the point, rebuild the pages at 1080 × 1350 or 1080 × 1080 before you upload. Set that size on the master, then design.

How many slides should the file have?

Enough for the outline, from 2 to 8 in Boykli, with 5 as the default. LinkedIn will accept up to 300 pages. Past eight swipes, you are handing someone a document that happens to paginate. A cover, the points, and a close usually fit in 5 to 7.

What font size is safe?

On a 1080-wide canvas, keep body type at 21px or larger, subtitles at 32–48px, and headlines at 48–80px, with long headlines at 56px or under. Five bullets or four cards is the density cap. Smaller type exists to rescue a crowded slide, and a crowded slide is the thing to split.

Why is the bottom of the cover empty?

The bottom 220 pixels is the safe zone. Brand-kit logo, handle, and profile photo are injected into the bottom corners. A headline in that band collides with the strip. Portrait gives you 270 extra pixels above that band. It does not shrink the band.

Can one create emit both ratios?

One create is one ratio. Square and portrait are separate PDFs. Changing the shape means creating again. On a Managed seat that is another carousel generation, inside the monthly carousel cap. BYOK has no Boykli monthly cap. You pay the provider for the run.

What if the PDF is sharp on desktop and soft on a phone?

Check the page size first. A 1920 × 1080 page scaled into a phone column shrinks the type even when the bitmap is sharp. Then check the type ramp. A 2× render inside a 1080 page does not rescue a 12px caption. Rebuild at 1080 wide with body type at 21px or above.