LinkedIn Document Ads: Specs, Setup and When to Use Them

30 October 2026. By Ads Daddy.

Your best PDF is probably gathering dust on a landing page nobody visits. LinkedIn Document Ads fix that. They put the file right in the feed, so people flick through it without leaving the platform. Gate it behind a form and you collect leads. Leave it open and you collect eyeballs.

Below: what the format is, the specs, gated vs ungated, a setup walkthrough, and how Document Ads stack up against Conversation Ads and Message Ads. No theory. Just what to do on Monday.

TL;DR

• Document Ads are Sponsored Content that show a PDF, Word or PowerPoint file in the feed. Members can read and download it without leaving LinkedIn.
• Two modes: ungated (free to read) or gated (preview a few pages, then fill in a pre-filled Lead Gen Form to unlock the rest).
• Key specs: PDF, DOC, DOCX, PPT or PPTX, up to 100 MB, up to 300 pages or 1 million words, up to 10 previewable pages on gated ads.
• Conversation Ads and Message Ads are different beasts: they land in the inbox as paid messages. Use them to start a dialogue, not to showcase content.
• Rule of thumb: documents for proof and education, conversations for qualifying and nudging.

Table of Contents

• What LinkedIn Document Ads actually are
• Gated vs ungated: pick your fighter
• LinkedIn document ad specs
• What to put inside a Document Ad
• How to set up a LinkedIn Document Ad campaign
• How to measure a Document Ad
• Conversation Ads vs Message Ads
• Document Ads vs Conversation Ads: which should you run?
• Document Ad examples you can borrow
• Our take on Document Ads
• Want us to run it for you?
• FAQ

What LinkedIn Document Ads actually are

Think of a Document Ad as a trailer for your best content. Except the trailer is the first chapter, and it plays inside the feed.

LinkedIn describes them as Sponsored Content that places documents directly in the feed so members can read and download them without leaving LinkedIn. The content types LinkedIn points to are eBooks, guides, tip sheets, case studies, data sheets, analyst reports, infographics and how-to guides.

Why that matters for ROI: every click that sends someone off to your website is a chance for them to bounce. Here, the content comes to them. Less friction, more reading, more signals about who actually cares.

They work for three campaign objectives in Campaign Manager:

• Brand awareness
• Engagement
• Lead generation

Same creative, different job. We'll get to which objective fits which goal.

Gated vs ungated: pick your fighter

This is the decision that shapes everything else.

Ungated Document Ads

Anyone can read and download the document. No form, no email, no hoops.

Use it when:

• You want reach and credibility more than a lead list.
• The content is a case study or a short guide that sells itself.
• Your audience is cold and a form would feel like asking for a ring on date one.

The trade-off: you get engagement data, but you don't get contact details.

Gated Document Ads

Members preview a selected number of pages, hit "Unlock Document", complete a pre-filled Lead Gen Form, and get the document by LinkedIn inbox confirmation. That message carries the download, your thank-you note and an off-site link.

Use it when:

• The document is valuable enough that people will trade their details for it.
• Your sales team can follow up fast.
• You want leads, not just applause.

The trade-off: fewer people will convert than would simply read, but the ones who do have put their hand up. Cheap clicks that never become conversations are the real cost, so judge gated ads on leads that turn into pipeline, not just cost per lead.

Which one first?

If you've never run the format, test both against the same audience. Same file, same targeting, one gated and one open. Compare engagement on the open version with lead quality on the gated one. Then decide where the budget goes.

LinkedIn document ad specs

The boring bit, but it will save you a rejected upload. These come from LinkedIn's own getting-started guide for Document Ads.

LinkedIn revises ad specs from time to time, so check Campaign Manager when you upload to confirm the current limits.

Practical spec advice

The limits are generous. That doesn't mean you should use them.

• Keep it short. Just because 300 pages is allowed doesn't mean anyone will read 300 pages in a feed. Aim for a punchy deck or guide, then link to the long version.
• Design for a phone. A lot of your audience will read on mobile. Big type, one idea per page, no tiny footnotes.
• Page one is your headline. If the cover doesn't stop the scroll, nothing after it matters.
• Choose the preview pages with care. On a gated ad, the preview is your sales pitch. Show enough value that the unlock feels like a no-brainer. Don't spend all your best stuff on page ten.
• Write intro text like a text message. Under 150 characters. One promise. Done.

What to put inside a Document Ad

A PDF dump of your brochure is the marketing equivalent of turning up to a first date with your CV. Nobody wants it.

Formats that earn their place:

1. Case study. Problem, what you did, the number that moved. Proof beats promises.
2. Short guide or checklist. "7 checks before you launch a LinkedIn campaign." Useful, skimmable, shareable.
3. Data or benchmark report. Only if the data is real and yours.
4. Slide deck from a talk or webinar. Recycle what you already built.
5. Tip sheet or how-to. Quick wins for a specific job title.

LinkedIn's 2025 ROI Playbook says Document Ads suit whitepapers, case studies and guides, either for thought leadership or for lead collection. That lines up with how we'd use them: show your thinking, then let the right people raise their hand.

If you also run video, a document and a short clip work well as a pair: the clip grabs attention, the document holds the detail. Our look at LinkedIn ad formats, features and examples shows how the formats sit side by side.

How to set up a LinkedIn Document Ad campaign

Here's the flow in Campaign Manager. Ten minutes if your file is ready.

1. Pick your objective. Brand Awareness, Engagement or Lead Generation. If you want gated leads, choose Lead Generation.
2. Upload a compliant document. Check the file type and size against the specs above.
3. Set your targeting. Job titles, seniority, industries, company size. Be specific. A broad audience burns budget on people who'll never buy.
4. Set previewable pages if you're gating the document.
5. Write the intro text and create the ad.
6. Attach a Lead Gen Form if you're running a lead generation campaign.
7. Plan the follow-up. Decide who gets the leads, how fast, and where they land (your CRM, an email tool, a sales inbox).

If you want the wider picture of building a campaign from scratch, we've written up how to create a LinkedIn ad step by step.

Prefer to automate? LinkedIn also offers APIs for Document Ads. Documents are uploaded first, then a post is created, then a creative that references the post. Most small and medium businesses won't need that. Campaign Manager does the job.

The mistake that kills most gated campaigns

Leads arrive. Nobody calls them. Three days later they've forgotten they downloaded anything.

Set the follow-up before you hit publish. A same-day email and a call within a day or two beats a fancy creative every time. Leads are perishable, like sushi.

How to measure a Document Ad

Define your KPIs before you spend a dollar. Otherwise every number looks like a win.

What to track:

• Document engagement: do people open it and flick through the pages?
• Downloads: how many take the file away?
• Leads: on gated ads, how many complete the form?
• Lead quality: do they match your ideal customer? Do they take your call?
• Pipeline: how many turn into real conversations and sales?

The last two matter most. Cost per lead is a nice number. Cost per sales conversation is the one that pays the rent.

If engagement is high and leads are low, the offer or the form is the problem. If leads are high and sales are low, the targeting or the document is attracting the wrong people. Tighten one thing at a time and give each change enough budget to tell you something.

Conversation Ads vs Message Ads

Searchers often lump these together. They're related, but not identical.

Message Ads are paid messages from you to a member's LinkedIn inbox. LinkedIn's documentation describes this format as a standard advertiser-created paid message that supports links, Lead Gen Forms and other interactions.

Conversation Ads are the chat-style version. LinkedIn describes them as a conversational experience between member and advertiser. In its 2025 ROI Playbook, LinkedIn calls it a choose-your-own-path experience that can include qualifying questions and Lead Gen Forms.

Both sit under LinkedIn's Sponsored Messaging umbrella, which LinkedIn says shows ads on desktop and mobile while members are active on the platform.

Think dating again. A Message Ad is a confident opener. A Conversation Ad is the banter that follows.

Document Ads vs Conversation Ads: which should you run?

They solve different problems, so the real question is where your buyer is right now.

Run Document Ads when:

• You have strong content and want to show it off.
• The audience needs to trust you before they talk to you.
• You want a lead magnet with a built-in preview.

Run Conversation or Message Ads when:

• You have a clear next step: a demo, a webinar, a consultation.
• You want to qualify people with a question or two before sales gets involved.
• Your audience is senior, time-poor and likely to respond to a direct approach.

Use them together when:

This is where it gets fun. Warm people up with a Document Ad. Then follow with a Message or Conversation Ad to people who engaged. First the proof, then the invitation. You've earned the right to ask.

For a wider view of which tactics move B2B numbers, see our piece on B2B advertising tactics to boost leads and ROI. And if carousels are on your list too, there's a rundown of LinkedIn carousel ad examples.

Document Ad examples you can borrow

No made-up case studies here. These are the shapes that tend to work, so build your own version.

• The "before and after" case study. Cover: the result in big type. Inside: the problem, the fix, the outcome. Ungated, targeted at lookalike buyers.
• The checklist. Cover: "Before you spend on ads, tick these 10 boxes." Gated after three pages. Great for services businesses and consultants.
• The buyer's guide. Cover: a plain question your customer asks. Inside: criteria, trade-offs, pricing logic. Gated, with a follow-up call.
• The webinar deck. Cover: the topic and speaker. Inside: the slides, trimmed. Ungated, used to drive registrations for the next one.
• The one-pager. A single sharp visual summarising your offer for a specific job title. Ungated and cheap to produce.

A quick test for any of them: if a stranger can get one useful idea from the first three pages, you're onto something.

Our take on Document Ads

We run paid campaigns across Meta, Google, YouTube, LinkedIn and Microsoft, so we see where LinkedIn fits and where it doesn't. It's pricey per click. That's the point of it, not the flaw.

Here's what we'd tell a friend running a small or mid-sized business.

Don't start with the format. Start with the buyer. If your customers are decision-makers you can target by job title or industry, LinkedIn earns its keep. If they're everyday consumers, put the money elsewhere.

Document Ads are underrated for service businesses. Consultants, agencies, finance brokers, software firms: you sell trust before you sell anything else. A good case study in the feed does a lot of that work for you.

Gate less than you think. Early on, an ungated ad tells you if the content is any good. Add the form once you know people actually want it.

Tracking is half the job. A lead that never reaches your CRM, or lands in someone's inbox a week late, is money in the bin. We care about integrated tracking and fast lead delivery as much as the creative.

You shouldn't have to become a platform nerd. Running ads is a job in itself. If your time is better spent running the business, hand the platform work to people who live in it.

— Adrian

Want us to run it for you?

If you'd rather skip the learning curve, we manage LinkedIn Ads alongside Meta, Google, YouTube and Microsoft Ads, so your campaigns work together instead of in silos. We handle the setup, the targeting, the creative direction, the tracking and the lead delivery. You get the leads.

Need leads rather than clicks? Our lead generation service is built for exactly that, and you can see how we work on our Australian site. Book a call and we'll tell you honestly whether LinkedIn Document Ads suit your business, or whether another channel will pay back faster.

FAQ

What are LinkedIn Document Ads?

They are Sponsored Content that show a document directly in the LinkedIn feed. Members can read and download it without leaving the platform. You can run them ungated for reach, or gated with a Lead Gen Form for leads.

What file types and sizes do LinkedIn Document Ads support?

LinkedIn's guide lists PDF, DOC, DOCX, PPT and PPTX files, up to 100 MB. Documents can run to 300 pages or 1 million words, and gated ads can preview up to 10 pages. Check Campaign Manager when you upload, as limits can change.

What is the difference between Message Ads and Conversation Ads?

A Message Ad is a single paid message in a member's inbox with a call to action. A Conversation Ad is a chat-style experience where the member picks from options and follows a path. Use Message Ads for one clear offer and Conversation Ads when you want to qualify or route people.

Should I gate my LinkedIn document?

Gate it if the content is valuable and your team can follow up fast. Leave it open if you want reach, trust and engagement data first. Many advertisers test both against the same audience before committing budget.

Do LinkedIn Document Ads work for small businesses?

They can, if your buyers are people you can target by job title, industry or company size, and you have a good piece of content. Start with a small budget, define your KPIs and plan the lead follow-up before launch. Without a follow-up process, even good leads go cold.

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