If you're about to upload a video to LinkedIn Campaign Manager, you want one clear answer: what are the actual video specs for LinkedIn video ads, and will your file get rejected or just look bad in the feed. This guide covers aspect ratio, resolution, file size, duration, captions, and the small formatting choices that decide whether your ad looks native in a LinkedIn feed or like an afterthought.
Video Specs for LinkedIn Video Ads: The Full Breakdown
LinkedIn video ads run mainly through Sponsored Content in the main feed, and the technical requirements are built around that placement: a scrollable, mostly mobile feed where video plays automatically with the sound off. The specs below reflect what LinkedIn's Campaign Manager has generally supported. Treat the exact numbers as a starting point and verify them in Campaign Manager before you launch, since upload limits and supported formats can shift.
| Spec | General guidance |
|---|---|
| Aspect ratio | Square (1:1), vertical (9:16) and horizontal (16:9) are typically supported |
| Resolution | Aim for at least 1080 x 1080 (square) or 1080 x 1920 (vertical); avoid anything below standard HD |
| File format | MP4 is the safest, most widely accepted format |
| File size | Keep well under the platform's maximum upload size; smaller, well-compressed files upload and process faster |
| Duration | Short-form ads in the 15–30 second range tend to fit the feed-scroll context best |
| Frame rate | 30 fps is a reliable default for smooth playback |
| Captions | Not mandatory, but strongly recommended since autoplay starts muted |
If you want the exact current ceiling on upload size before you export your final render, it's worth checking a dedicated breakdown like Max File Size for LinkedIn Video Ads rather than guessing and re-exporting after a failed upload.
Aspect Ratio: Why Square and Vertical Beat Horizontal in Feed
LinkedIn's feed is a vertical scroll on mobile, where most impressions happen. A horizontal 16:9 video gets letterboxed with gray or white bars on either side, shrinking your actual visual area and your text size. Square (1:1) and vertical (9:16) fill more of the screen, which generally means bigger product shots, bigger captions, and a stronger first impression before anyone taps.
- Use square (1:1) if you want one asset that also works reasonably on desktop feed views.
- Use vertical (9:16) if your primary distribution is mobile and you're repurposing the same creative across other channels.
- Reserve horizontal (16:9) for cases where the same ad also runs as a pre-roll or in-stream video elsewhere and you don't want to produce a second version.
A practical workflow many teams use is to produce one vertical master, then export square and horizontal crops from it, rather than shooting three separate versions. That only works if your key copy and product shot sit inside a safe center zone that survives all three crops.
Resolution, File Size and Export Settings
Resolution and file size work against each other: higher resolution generally means a bigger file, and bigger files take longer to upload and can hit platform limits. The practical approach is to export at a resolution that looks sharp on a phone screen, then compress with a standard codec rather than exporting at an unnecessarily high bitrate. Most ad platforms, LinkedIn included, re-compress video after upload anyway, so an oversized source file rarely buys you extra quality in the delivered ad.
If you're unsure where the current ceiling sits, don't guess. A failed upload late in a campaign launch is one of the easiest mistakes to avoid by checking specs first. For LinkedIn specifically, see Max File Size for LinkedIn Video Ads for a focused breakdown of current limits and how to stay under them without hurting quality.
Duration: How Long Should a LinkedIn Video Ad Actually Be
LinkedIn's Campaign Manager generally allows a wide duration range, but allowed is not the same as effective. A B2B feed scroll rewards a quick, clear message over a long story. Shorter ads tend to hold attention through the whole message instead of losing viewers halfway through a slow build-up.
A reasonable structure for a 15–30 second LinkedIn video ad:
- Seconds 0–3: a hook tied to the viewer's role or problem, shown visually and in text, since sound is often off.
- Seconds 3–10: the specific pain point or situation your product addresses.
- Seconds 10–20: the product or solution, shown doing the thing it claims to do.
- Seconds 20–30: proof point (a number, a use case, a before/after) and a clear call to action.
For a deeper breakdown of exactly how long to make the video and why, including differences between feed placements, see Recommended Video Length for LinkedIn Video Ads.
Designing for Sound Off and Mobile-First Viewing
Autoplay in feed generally starts muted, so the ad has to work as a silent experience first and a sound-on experience second. This isn't unique to LinkedIn, but B2B audiences scrolling during work hours are especially likely to keep sound off. Design around that assumption rather than against it:
- Put your main claim in on-screen text within the first few seconds, not only in voiceover.
- Use word-by-word or line-by-line captions synced to any spoken audio so the message survives on mute.
- Keep text large enough to read on a small phone screen without zooming.
- Leave the logo and call to action visible for a beat or two longer than feels necessary, since viewers scroll at their own pace.
This is also where production tools matter. Building a 30-second ad from scratch, with correct captions and a mix that works muted or with sound, is the kind of repetitive production work that eats time if done manually for every campaign. FrameNotion generates a 30-second vertical ad from a product link, with word-by-word captions and a soundtrack cut to the beat, specifically built to hold up whether the viewer has sound on or off.
A Pre-Launch Checklist for LinkedIn Video Ads
Before you upload, run through this short list instead of trusting that your export settings were correct the first time:
- Aspect ratio matches the placement you're targeting (square or vertical for main feed).
- Resolution is sharp but not needlessly oversized.
- File size sits comfortably under the current platform limit.
- Duration is in the 15–30 second range unless you have a specific reason to go longer.
- Captions are present and legible on a small screen.
- The first few seconds communicate the core message without sound.
- A clear call to action appears both visually and, if used, in voiceover.
How FrameNotion Fits Into a LinkedIn Video Ad Workflow
FrameNotion is built around producing short vertical ads quickly rather than hand-editing specs for every placement. You paste a product or website link, and FrameNotion AI writes and renders a 30-second, 1080x1920 MP4 ad from scratch, with a hook, problem, benefit, proof and call to action structured in automatically. Every ad also comes bundled as 4:5, 1:1 and 16:9, which covers LinkedIn's main supported formats without a separate edit pass.
On-screen copy can be generated in 18 languages, and each ad ships with an AI voiceover, music cut to the beat, sound effects and word-by-word captions, or music-only or silent if you prefer a cleaner look for a professional audience. Once an ad is rendered, text and colors can be adjusted directly rather than rebuilding the whole thing, and A/B hook variants are available on the Pro and Agency plans if you want to test different openings for a LinkedIn feed audience. You can see finished examples at FrameNotion examples, review the full process at how it works, or check current pricing, which includes one free ad on signup.
FrameNotion does not publish directly to LinkedIn or any ad platform, and it doesn't provide ad performance analytics. You still upload the finished MP4 into Campaign Manager yourself and monitor results there. What it removes is the slow part: writing the script, building captions, sourcing music, and exporting multiple aspect ratios by hand every time you want to test a new LinkedIn video ad.
Frequently asked questions
Does LinkedIn support vertical 9:16 video ads?+
Yes, vertical video is generally supported for LinkedIn's main feed placements and tends to fill more of the mobile screen than a horizontal video, which is why many advertisers default to it.
Do LinkedIn video ads need captions?+
Captions aren't required, but since feed video generally autoplays muted, adding captions is one of the most reliable ways to make sure your message gets across before someone decides whether to unmute or scroll past.
Can I use the same video ad on LinkedIn and other platforms like TikTok or Instagram?+
Often yes, as long as the aspect ratio and duration fit each platform's placement. A vertical, caption-ready ad built for one channel can usually be reused on another, though it's worth checking each platform's own spec guide first.
What happens if my video file exceeds LinkedIn's size limit?+
The upload will typically fail or get rejected in Campaign Manager. Compressing with a standard codec and checking current limits before export avoids last-minute re-renders.
Is a longer video always better for LinkedIn ads?+
Not necessarily. A longer runtime only helps if the content earns the extra seconds. For most feed-scroll campaigns, a focused 15–30 second ad that gets to the point quickly tends to hold attention better than a longer one.