LinkedIn post sizes: image, video and document dimensions
Choose text, image, document, or video to see the technical limits, useful design presets, and the final check to make before publishing.
Direct answer
Use 1080 px width; 1080 × 1350 px (4:5) is a practical vertical default.
- Vertical working size
- 1080 × 1350 px (4:5)
- Square working size
- 1080 × 1080 px (1:1)
- LinkedIn aspect-ratio range
- 3:1 to 4:5
- File
- Up to 5 MB; up to 20 photos in one post
How to choose
For graphics with text, 4:5 uses more mobile feed space. Keep essential text large and away from edges.
How to verify
Open the mobile preview and check legibility, cropping, and alt text before publishing.
LinkedIn post sizes for every format
The same specifications as the selector above, for all four post types at once.
LinkedIn text post size
| Technical limit | 3,000 characters |
|---|---|
| Format | Plain text, emoji, and line breaks |
| Preview | Check the fold on mobile and desktop |
Treat 3,000 as a ceiling, not a target. Use the shortest version that develops one useful idea.
LinkedIn image post size
| Vertical working size | 1080 × 1350 px (4:5) |
|---|---|
| Square working size | 1080 × 1080 px (1:1) |
| LinkedIn aspect-ratio range | 3:1 to 4:5 |
| File | Up to 5 MB; up to 20 photos in one post |
For graphics with text, 4:5 uses more mobile feed space. Keep essential text large and away from edges.
LinkedIn document/carousel post size
| Vertical working size | 1080 × 1350 px (4:5) |
|---|---|
| Other useful presets | 1080 × 1080 px or 1920 × 1080 px |
| Accepted formats | PDF, PPT, PPTX, DOC, and DOCX |
| Official limit | 1 document, up to 100 MB and 300 pages |
PDF usually preserves layout best. These dimensions are design presets, not an official requirement.
LinkedIn video post size
| Accepted resolution | 256 × 144 to 4096 × 2304 px |
|---|---|
| Accepted aspect ratio | 1:2.4 to 2.4:1 |
| Duration | Up to 15 minutes |
| File | 75 KB to 5 GB; 10 to 60 fps |
Choose vertical or square when most viewers are on mobile. Add captions and keep key text clear of controls.
Official limits versus working sizes
LinkedIn publishes hard limits for files, pages, duration, resolution, and aspect ratios. A working size such as 1080 × 1350 px is different: it is a convenient design preset inside the accepted range. Keeping that distinction clear prevents a practical recommendation from becoming a false platform rule.
Primary references: LinkedIn Help for the 3,000-character post limit, photo ratios and file limits, document formats, pages, and file size, and video file requirements. Specifications verified September 17, 2026; video requirements rechecked October 13, 2026.
A four-step pre-publish check
- 1. Match the format to the idea. Use text for a focused argument, an image for one visual point, a document for a sequence, and video when motion or delivery matters.
- 2. Check the source file. Confirm page order, resolution, duration, file size, captions, and any text near the edges.
- 3. Preview on a phone. Mobile width changes line breaks, crops, and whether labels remain readable.
- 4. Verify in LinkedIn. The live composer is the final authority because the interface can change after this guide is updated.
Related tools
- Preview a LinkedIn post on desktop and mobile.
- Count LinkedIn characters before you reach a platform limit.
- Format LinkedIn text and review accessibility before copying it.
Frequently asked questions
What size should a LinkedIn image post be?
1080 × 1350 px at 4:5 is a practical vertical default because it uses more mobile feed space. LinkedIn accepts image aspect ratios from 3:1 to 4:5, so 1080 × 1080 px is also a useful square option.
What size should a LinkedIn carousel be?
For document posts, use the same page size throughout and export as PDF. 1080 × 1350 px at 4:5 is a practical design preset, not an official requirement. LinkedIn accepts one document up to 100 MB and 300 pages.
How long can a LinkedIn text post be?
A LinkedIn post can contain up to 3,000 characters. Treat that number as a ceiling: the best length is the shortest version that develops the idea clearly.
Are these dimensions guaranteed to render identically?
No. LinkedIn can change crops, folds, and interface controls across devices and product updates. Use these specifications to prepare the asset, then confirm it in LinkedIn’s real composer before publishing.