LinkedIn Document Ad Character Limits
Document ads (lead-gating PDFs) cap intro text at 150 chars total — among the tightest on LinkedIn. The headline does the persuasion work.
LinkedIn Document Ads gate a multi-page PDF or whitepaper behind a Sponsored Content shell — viewers can flip through pages inside the feed and download the full asset (sometimes with a lead form gate). Among Sponsored Content formats, document ads have the tightest intro-text budget: just 150 characters total, with about 100 visible before clamp. The PDF preview itself is the hook. The headline still allows 70 characters with ~50 visible.
The strategic implication is the inverse of single-image: instead of front-loading the value prop in intro text, document ads front-load it on the PDF cover page. The 100 visible characters of intro work better as a one-line tease ("12-page benchmark report — download the full data") than as a value-prop summary. The cover page does the rest.
Document ads only allow 150 chars of intro text total. The PDF preview is the hook.
Headline carries the offer
brand.com
Verified 2026 limits
| Field | Hard max | Visible before truncate | Warn at |
|---|---|---|---|
| Introductory text | 150 | 100 | 90 |
| Headline | 70 | 50 | 40 |
Source: https://www.linkedin.com/help/lms/answer/a525399 · Last verified 2026-04-15.
Lead-gate vs no-gate
Document ads support a download gate that captures lead-form data before the full PDF unlocks. Gated downloads pull lower CTRs (15–30% drop) but produce qualified leads. Ungated downloads optimize for brand-awareness reach.
FAQ
- What file types does a LinkedIn document ad support?
- PDF, DOC, DOCX, PPT, and PPTX. Maximum file size is 100MB and 300 pages.
- How many characters of intro text show on document ads?
- About 100 visible before clamp on mobile feed. The hard cap is 150.
- Does the lead-gen form increase qualification?
- Yes — gating cuts top-of-funnel volume but increases SQL rate. For pure brand awareness, leave it ungated.