LinkedIn Ad Formats: The Best Format for Each Goal, With Specs and Examples

LinkedIn ad formats fall into four families. Sponsored Content runs in the feed and covers single image, carousel, video, document, event and thought leader ads. Sponsored Messaging covers conversation ads and message ads delivered to the LinkedIn inbox. Dynamic Ads are the personalised Spotlight and Follower units in the desktop right rail. Text Ads are the small right rail banners. For most B2B campaigns the honest answer is that single image ads should be your default, video is worth it only when the video is genuinely good, and document ads are the most underused format on the platform.

What follows is what each format is built to do rather than a list of what each one is. The specs matter here, because two or three numbers rule formats in or out before creative ever gets discussed.

LinkedIn ad formats at a glance

What are the four categories of LinkedIn ad formats?

The four categories are Sponsored Content, Sponsored Messaging, Dynamic Ads, and Text Ads. Sponsored Content is everything that appears natively in the LinkedIn feed. Sponsored Messaging delivers into the LinkedIn inbox. Dynamic Ads personalise a right rail unit using the viewer's own profile photo and name. Text Ads are plain right rail banners. Lead Gen Forms are not a fifth category; they attach to formats in the first two groups.

That grouping matters more than it looks, because it maps almost exactly onto where an ad can be seen. Sponsored Content reaches everyone. Sponsored Messaging reaches the inbox on both devices. Dynamic Ads and Text Ads are desktop only, which in practice removes a large share of the audience before you have written a word.

Which LinkedIn ad format performs best?

Single image ads win the most campaigns, mostly because they are the cheapest format to produce well and the hardest to get badly wrong. That is a different claim from saying they have the best benchmark numbers. Video and document ads often post better engagement rates, but engagement rate is the metric most detached from pipeline on this platform, and both formats have a production floor that a still image does not. A weak video costs more than a strong static and performs worse than it.

The more useful framing is to match format to what the ad has to accomplish. If the prospect already understands the category and you need them to act, single image with a lead form or a landing page click. If they do not understand the category, a document ad or a video that teaches something. If you are working a named account list, Dynamic Ads and conversation ads exist to stay visible and get a reply, not to convert cold traffic.

Single image ads: the default that deserves to be the default

A single image ad is one image, up to 150 characters of introductory text before LinkedIn truncates it, and a headline of up to 70 characters. Images run 1200 x 628 for landscape at 1.91:1, 1200 x 1200 square, or 720 x 900 vertical, as JPG, PNG or non-animated GIF up to 5 MB. Full numbers for every format sit on our LinkedIn ad specs page.

Two things make this format hard to beat. It is the only one where you can produce a full test set in an afternoon, which matters because creative variance on LinkedIn is wide and the winner is rarely the one the team expected. And it carries a Lead Gen Form as cleanly as any format on the platform, so the highest converting path on LinkedIn is available without a landing page. The failure mode is writing to the wrong limit: teams either stop at 150 characters believing it is a hard cap, or write 900 and lose three quarters of it behind a see more link that almost nobody taps.

Carousel ads: a sequence, not a gallery

Carousel ads take 2 to 10 square cards at 1080 x 1080, up to 10 MB each. The number that decides how you design them is not in the upload dialog: LinkedIn scales cards to 312 x 312 in the feed. That is small. A card containing a product screenshot, a chart, or more than about six words of set text arrives as texture rather than information.

Carousels earn their place when the cards form a sequence a reader can follow at a glance, one idea per card, and when swiping is part of the point. They fail when they are used as a gallery of product shots, which is the most common use. Two more spec traps: the carousel intro text hard maximum is 255 characters rather than the 3,000 you get on a single image ad, and card headlines cap at 45 characters when the card links to a destination URL.

Document ads: the format most accounts skip

Document ads let someone read a PDF, Word file or slide deck inside the feed, and collect the lead only if they want the file. LinkedIn accepts up to 100 MB and 300 pages, with up to five documents per ad. Because the reader can page through before deciding, the format sells the content on its own merits instead of asking for an email against a promise.

They work for genuine research, benchmark data, checklists and teardowns. They do not work for a rebadged sales deck, because the preview exposes that immediately. Design for a phone: wide pages, large type, the finding on page one, and eight to twelve pages rather than forty. This is also the format where the asset already exists in most companies, sitting unused in a folder, which makes it the cheapest new format to test.

Video ads: worth it when the video is worth it

LinkedIn video ads are MP4 files between 75 KB and 500 MB, 3 seconds to 30 minutes, at under 30 frames per second, with captions supplied as SRT. Recommended resolutions are 1920 x 1080 for 16:9, 720 x 900 for 4:5 and 720 x 1280 for 9:16. In-stream placements cap at 90 seconds.

The honest position on video here is that the format has the widest quality gap of any on LinkedIn. Good video does things no still can: showing software actually working, letting a customer speak, walking through a process. Filler video, the kind with stock footage and a caption crawl, competes with a feed of people talking about their jobs and loses. If the choice is between a decent static set and a video you are not proud of, run the statics. Also plan for sound off, because most of the feed is watched that way, which is what the SRT requirement is really about.

Conversation, message and the right rail formats

Conversation ads allow up to 8,000 characters of message body, five CTA buttons per message and fifty across the conversation, plus an optional 300 x 250 banner that only desktop users see. Message ads are the simpler version: 1,500 characters, one CTA capped at 20 characters. Both land in the LinkedIn inbox, both cost meaningfully more per delivery than feed formats, and both are only worth running against a list narrow enough that a real person would have sent the message themselves. Sent broadly they read as spam and the reputational cost is not recoverable inside the same quarter.

Text, Spotlight and Follower ads live in the desktop right rail at sizes like 300 x 250, 160 x 600, 728 x 90 and 496 x 80, with a 100 x 100 logo as the only image on most of them. They are cheap, they are invisible on mobile, and their job is presence against an account list you are already working, not acquisition.

One format worth mentioning separately is the job ad, because recruiting budgets are a large share of LinkedIn spend and the creative brief is completely different: the audience is passive, the offer is a role, and the volume of applicants is the point. Teams running those campaigns at any scale usually need something on the other end to screen the first round of applicants before a human ever reads a resume, otherwise the ad spend just moves the bottleneck.

Can you use the same creative across LinkedIn ad formats?

Partly. The single image ad and the Lead Gen Form version of it share creative exactly. A 1:1 single image and a carousel card are the same ratio, so the file transfers, but a card that will render at 312 x 312 needs larger type than the same artwork at feed size. Everything else needs its own asset: video needs a video, document ads need a document, event ads pull their 4:1 image from the LinkedIn event page rather than the ad, and Dynamic Ads want a square logo.

The practical approach is to build the square and the landscape crop of one concept at the same time, run them as a set, and only commission the heavier formats once a concept has proven it can hold attention as a still. That is also roughly the order of production cost, which is a convenient coincidence.

How many LinkedIn ad formats are there?

LinkedIn currently sells eleven distinct formats across the four families: single image, carousel, video, document, event and thought leader ads under Sponsored Content; conversation and message ads under Sponsored Messaging; Spotlight and Follower ads under Dynamic Ads; and Text Ads. Job ads and Lead Gen Forms are usually counted alongside these, though LinkedIn treats the form as an attachment to a format rather than a format in itself.

Start with the format you can test properly

The format decision is less important than most people assume, and the creative variance inside a format is larger than the average difference between formats. That argues for starting where you can produce a real test set rather than one asset: single image, three to five distinct concepts, each in landscape and square. Once a concept wins, that is the one worth the video budget or the document build.

Adscreator does the production half of that from a product URL, returning the image in every LinkedIn crop plus copy written to the 150 and 70 character display limits. If you want the numbers before the creative, the LinkedIn ad specs reference covers every format on one page, the LinkedIn ad copy generator covers writing to those limits, and how much LinkedIn ads cost covers what the auction will charge you for the privilege.