LinkedIn Post Specs 2026: Every Dimension, Limit, and Format (Verified)

LinkedIn gives you 3,000 characters per post, supports feed images from a 3:1 to a 4:5 aspect ratio, and caps organic video at 15 minutes on desktop. Those three numbers matter most, and most spec guides online get at least one of them wrong.

The problem isn't a shortage of LinkedIn spec guides. It's that they contradict each other, and many haven't been touched since 2023. Video length alone ranges from 10 to 30 minutes depending on who you ask. Image dimensions get quoted as 1080×1080, 1200×627, and 1200×1200, all in the same breath.

So every figure below was checked against LinkedIn's official help pages. Where LinkedIn doesn't publish a number, this guide says so instead of guessing. Last verified: June 2026. When LinkedIn changes these (and it will), this page gets updated.

Quick Reference: LinkedIn Post Specs at a Glance

Here are the numbers you'll reach for most often.

One wrong dimension and your image gets cropped. One buried hook and your point disappears behind "...see more." Specs aren't optional. They decide whether your content shows up the way you designed it.

What Is the LinkedIn Post Character Limit in 2026?

LinkedIn allows 3,000 characters per post. That's roughly 430 words, plenty for almost any post.

The real constraint isn't the ceiling. It's truncation. LinkedIn collapses your post after the first line or two and hides the rest behind a "...see more" link.

LinkedIn doesn't publish an exact cutoff. In practice it lands around 140 characters on mobile and somewhat higher on desktop, and it shifts with interface updates. So write your hook to land well inside the first line, on both views.

Why does this matter so much? Because the hook decides whether anyone reads the rest. Compare two openings for the same post:

• Weak: "I wanted to share some thoughts on why most LinkedIn strategies fail..."

• Strong: "Most LinkedIn strategies fail because creators chase vanity metrics instead of conversation."

Same idea. The first gets scrolled past. The second gets read, because the insight lands before the cut.

Spaces, line breaks, hashtags, and @mentions all count toward your 3,000-character budget. If you paste from a word processor, watch for hidden formatting characters that inflate the count.

You can check your exact count against LinkedIn's rules with ContentIn's LinkedIn Character Counter, which flags when you're approaching truncation so you can rewrite your opening line before you post.

What Are the Correct LinkedIn Image Dimensions?

This is where most guides go wrong. They quote 1200×627 for every image. That figure is real but it's the link-preview spec, not the spec for a photo you upload directly.

Single-Image Post Specs

For an uploaded photo, LinkedIn supports an aspect ratio from 3:1 (wide) to 4:5 (tall), and it renders at a maximum ratio of 4:5. LinkedIn recommends at least 1080 pixels wide, with a minimum of 552×276.

That means square (1:1) and portrait (4:5) images are fully supported and are not cropped in the feed. In fact, they take up more screen space on mobile than a wide landscape image, which is exactly where most people scroll.

So design at 1080×1080 (square) or 1080×1350 (portrait) for maximum feed presence. Use landscape only when the image genuinely needs the width.

A note on file size: LinkedIn's published Page-image guidance caps images at 3 MB and PNG or JPEG. For feed photos, LinkedIn doesn't publish a hard file-size limit, so upload a high-resolution JPG or PNG and let LinkedIn handle compression. Starting at 1080 px wide or higher gives the cleanest result after processing.

Multi-Image Post Specs

You can add up to 20 images in a single multi-image post. Each image follows the same size and format rules as a single image.

LinkedIn lays these out based on the first image. If the first is landscape, it sits at the top with the rest below. If it's portrait or square, it sits on the left with the others stacked to the right. Two-image posts appear side by side.

Because the layout crops images to fit, using one consistent aspect ratio across all of them keeps your set from looking mismatched. Pick 1:1 or 4:5 and stick to it for every image in the post.

What Are the LinkedIn Video Specs You Actually Need?

LinkedIn's official video specs for organic feed posts:

• File size: minimum 75 KB. Many guides cite a 5 GB maximum; LinkedIn's help docs emphasize duration and resolution over a published file cap, so treat 5 GB as a practical ceiling and expect compression on large files.

• Duration: 3 seconds minimum. Maximum is 15 minutes when you upload from desktop and 10 minutes from the mobile app. Company Pages cap at 10 minutes.

• Resolution: 256×144 to 4096×2304. Aim for 1920×1080 (1080p).

• Aspect ratio: supported from 1:2.4 (very tall) to 2.4:1 (very wide). Practical sweet spots are 1:1, 4:5, 9:16, and 16:9.

• Frame rate: 10 to 60 fps.

• Bit rate: 192 kbps to 30 Mbps.

• Format: MP4 with the H.264 codec is the safest, most consistent choice.

One correction worth flagging: the "30 minutes" figure you'll see everywhere is the video ad limit, not the organic post limit. For a normal post, 15 minutes (desktop) is your real cap.

Which Aspect Ratio Wins on Mobile?

Square (1:1) and vertical (4:5, 9:16) video fill more of the mobile screen than landscape (16:9). More screen space tends to mean more watch time, and watch time is a strong engagement signal.

Most LinkedIn viewing happens on mobile. So if you're repurposing a 16:9 clip from YouTube, reframe it to 1:1 or 4:5 before uploading. Landscape still works fine for desktop-first audiences.

Do You Need Captions?

Yes. LinkedIn auto-generates captions on uploaded video, and you can edit them after posting. The auto-transcription is decent but stumbles on names, jargon, and accents.

Many people watch with the sound off, so review and correct the captions before you publish. Treat them as required, not optional.

Native Uploads vs. Link Embeds

Upload video natively. A YouTube or Vimeo link generates a preview card, but it won't autoplay and it won't be treated as native video. Native uploads autoplay in the feed and consistently outperform link embeds on reach. Don't post a YouTube link and expect video performance.

What Are the LinkedIn Document (Carousel) Post Specs?

Document posts (what most people call carousels) let you upload a multi-page file that readers swipe through. LinkedIn converts each page to an image, so design size matters for crispness.

• Formats: PDF, DOC, DOCX, PPT, PPTX. PDF renders most reliably.

• Max file size: 100 MB.

• Max pages: up to 300 (widely reported; confirm before uploading very large files). Just because you can use 300 doesn't mean you should; concise carousels hold attention better.

• Recommended design size: 1080×1080 (square) or 1080×1350 (portrait). These match how the feed displays on mobile. A4 or landscape sizes are allowed but perform worse on phones.

Because LinkedIn rasterizes your file, start with high-resolution graphics and readable fonts — 14 pt minimum for body text. Tiny text and low-contrast color schemes vanish at thumbnail size.

You can build carousels in PowerPoint, Keynote, Canva, or Figma and export to PDF, just set the slide size to match LinkedIn's display ratio first. ContentIn's LinkedIn Carousel Generator gives you the correct dimensions from the start, so you design once and export without resizing.

How Do Link Preview Images Work on LinkedIn?

When you paste a URL, LinkedIn fetches a preview card, an image, headline, and description pulled from the linked page.

The recommended preview image is 1.91:1 at 1200×627 pixels, in JPG or PNG. The image must be more than 200 pixels wide, or LinkedIn shows it as a small thumbnail beside the text instead of a full card.

LinkedIn reads this from your page's Open Graph (OG) meta tags. If your site is missing og:image, og:title, and og:description, LinkedIn guesses, and the result is often a broken or irrelevant preview.

You can edit the headline and description in the composer, but you cannot change the preview image there. If LinkedIn grabbed the wrong image, fix your OG tags, then run the URL through LinkedIn's Post Inspector to clear the cache and force a fresh fetch. LinkedIn caches preview data for weeks, so the Inspector step is what makes the new image appear.

How Many Hashtags Should You Use on LinkedIn?

Three to five per post is the widely recommended range. More than that starts to look spammy on a professional feed and rarely adds reach.

One honest caveat: this 3–5 figure is repeated almost everywhere and often attributed to LinkedIn, but it traces to marketing guides rather than a specific LinkedIn help page. Treat it as strong best practice, not gospel.

Hashtags also work differently than they used to. LinkedIn removed hashtag following, so a hashtag no longer pushes your post to a feed of followers. Today they function more like keywords and topic signals. Choose specific, relevant tags over broad ones, and place them at the end of the post or weave them in naturally.

And remember: hashtags count toward your 3,000-character total.

Do Personal Profiles and Company Pages Have Different Specs?

Mostly, no. The character limit, image dimensions, document specs, and core video specs are identical. The differences are functional, not technical.

A few things worth knowing:

• LinkedIn Stories no longer exist. LinkedIn discontinued Stories in 2021 for everyone, personal and company alike. Any guide still listing Stories specs is out of date.

• LinkedIn Live is available to both, though eligibility can differ. Pages may need to meet requirements. It's no longer gated behind "Creator Mode," which LinkedIn retired in 2024; those creator tools now sit in every profile by default.

• Reach tends to favor personal profiles. Even with identical content, personal posts generally see more organic reach than company-page posts. LinkedIn doesn't publish reach figures, so treat this as a widely observed pattern rather than a hard number.

If you manage both, you can reuse the same images, videos, and carousels across both, just expect engagement to differ.

What Are the Most Common LinkedIn Spec Mistakes?

Forcing Images Into a Landscape Frame

Designers often default to wide 1200×627 graphics because old guides say so. On mobile, that wastes screen space. Square (1080×1080) or portrait (1080×1350) fills the feed and stops the scroll. Reserve 1.91:1 for link previews, not uploaded photos.

Burying the Hook Below Truncation

If your first line is filler: "I wanted to share some thoughts on..." the actual point lands after "...see more," and most readers never expand it. Lead with the insight. Save the setup for later. You can preview exactly where the cut falls with ContentIn's LinkedIn Post Preview, which shows mobile and desktop side by side.

Uploading Over-Compressed Media

LinkedIn compresses everything. If you start with a heavily compressed 720p export, you end up with blocky playback. Export images at 1080px+ and video at 1080p with a healthy bitrate, then let LinkedIn do the final pass.

Posting Vertical Video in a Landscape Box

A 9:16 phone video dropped into a 16:9 frame shows black bars and wastes most of the screen. Match the aspect ratio to how people will watch, vertical or square for mobile, landscape for desktop. Crop or reframe instead of forcing it.

FAQ: LinkedIn Post Spec Questions

Does LinkedIn compress images? Yes — every uploaded image, sometimes aggressively. Start at 1080 px wide or more, with minimal existing compression, for the cleanest result.

What's the best aspect ratio for LinkedIn images? Square (1:1) or portrait (4:5). Both are fully supported and fill more mobile screen space than landscape.

What's the longest video I can post organically? 15 minutes from desktop, 10 minutes from the mobile app, and 10 minutes on a company Page. The 30-minute figure applies only to video ads.

Can I edit a post after publishing? You can edit the text: caption, hashtags, typos. You cannot swap the image, video, or document after the post is live. To change media, delete and repost.

Do hashtags count toward the 3,000-character limit? Yes. Hashtags, @mentions, spaces, and line breaks all count.

How many images can one post hold? Up to 20 in a multi-image post.

What file format is best for carousels? PDF. PowerPoint and Word also upload, but conversion can shift fonts or layouts. Export to PDF for the most reliable rendering.

Does LinkedIn support animated GIFs in feed posts? LinkedIn's documentation doesn't clearly state how animated GIFs behave in feed image posts. If you need motion, upload a video, that path is well documented.

Why does my link preview show the wrong image? LinkedIn pulls it from your page's Open Graph tags. Fix your og:image tag, then use LinkedIn's Post Inspector to clear the cache and refetch.

What's the difference between a document post and a carousel ad? A document post is organic, free, and appears in the feed and on your profile. A carousel ad is paid, built in Campaign Manager with targeting and budget controls. The design principles overlap, but they're separate formats.

Specs Are the Floor, Not the Ceiling

Getting the specs right won't make your content great. Getting them wrong will make it invisible.

A cropped image, a blurry video, or a hook buried below "...see more" loses the reader before they process your message. The specs make sure your content shows up the way you intended. That's the floor.

Above the floor, everything depends on the work the specs can't do for you: the hook, the insight, the design, and a real understanding of what your audience cares about. A perfectly sized 1080×1080 image won't stop the scroll if it's boring. The creators who win nail the specs once, then put their energy into substance.

How ContentIn Helps You Get the Specs Right

If you publish on LinkedIn regularly, checking specs by hand gets old fast — counting characters, previewing truncation, resizing slides, hoping it looks right after you post.

ContentIn handles the parts that slow you down. The LinkedIn Character Counter shows where mobile truncation will cut your post. The LinkedIn Post Preview shows mobile and desktop views side by side. And the LinkedIn Carousel Generator gives you the right dimensions from the start.

You still write the content and design the visuals. ContentIn just takes the spec-checking off your plate, so you can focus on the work that actually moves the needle. Try the tools free at contentin.io.

Looking for profile banner and cover dimensions? Those are a different set of specs — see our LinkedIn banner size guide.

Last verified against LinkedIn's official help pages: June 2026. Figures LinkedIn does not officially publish are flagged as such in the text.