If your Facebook feed video ad looks cropped, blurry, or gets stuck in review, the problem is almost always a mismatch between what you exported and what the placement expects. Getting the video ad specs for Facebook feed ads right before you upload saves you from re-rendering a file at 11pm the night before a launch.
What Counts as a Facebook Feed Ad, Exactly
"Facebook feed" refers to the main scrolling placement on the Facebook app and website - the one where video ads sit between friends' posts, Pages you follow, and other promoted content. It's different from Facebook Reels, Stories, Marketplace, and the right-hand column, even though Meta's Ads Manager often buys all of these together under one campaign unless you unbundle placements. This article focuses on the classic feed placement; if you're running the same creative across Reels and Stories too, it helps to read our guide on video ad specs for feed placement ads alongside this one, since the two placements share some rules but not all.
Aspect Ratio and Resolution for Feed
Facebook's feed is a flexible container - it will play square, vertical, and horizontal video - but not every shape uses the space equally well on a phone screen, which is where most feed impressions happen.
- 4:5 (vertical, slightly taller than square) - generally the safest default for feed. It fills more of the screen than 1:1 without the heavy cropping risk of full 9:16 in a feed card.
- 1:1 (square) - still works well and is forgiving if the same asset also needs to run on older placements or partner networks.
- 9:16 (full vertical) - supported in feed, but Facebook's feed card will usually show it inside a shorter frame, so top and bottom portions can get cropped or masked. Fine if you also run it on Reels and Stories, but don't assume feed will show the full frame.
- 16:9 (horizontal) - technically accepted but takes up the least screen real estate on mobile feed, so it's rarely the best choice for a cold-traffic ad.
As a rule of thumb for resolution: export at least 1080 pixels on the shorter side (so 1080x1350 for 4:5, or 1080x1920 if you're reusing a 9:16 master). Going lower risks visible compression artifacts once Facebook re-encodes the file for delivery.
File Format, Size, and Duration: The Technical Basics
Meta's ad specs for video change their exact numeric limits from time to time, so always do a final check inside Ads Manager at upload time. That said, the fundamentals have stayed stable for a while and are safe to plan around:
- File type: MP4 or MOV, encoded with H.264 compression and AAC audio. These are the most reliably accepted combination.
- File size: keep it well under the platform's current cap - as a working target, aim to finish well under 500MB for a 30-second ad, which is easy to hit with reasonable compression.
- Duration: feed technically allows a wide range of lengths, but for a direct-response ad, 15-30 seconds is a sensible starting point to test. Shorter cuts suit retargeting and offer-led creative; slightly longer cuts suit a full hook-problem-benefit-proof-CTA structure.
- Frame rate: 30fps is a safe, broadly compatible default.
If you're unsure how long your ad should actually be for your goal (awareness vs. conversion vs. retargeting), the breakdown in recommended video length for Reels ads applies almost directly to feed too, since both placements reward getting to the point quickly.
Captions, Sound, and Safe Zones
Feed video typically autoplays muted until someone taps it, so sound is a bonus, not a guarantee. Design the ad to work on mute: put the core message in on-screen text and captions, and treat the voiceover or music as reinforcement rather than the only way the message lands.
Practical checklist for sound and text
- Burn in captions or use Meta's auto-captions, but check the timing and wording - auto-generated captions can misread product names.
- Keep your hook line readable in under two seconds of screen time; don't rely on someone having sound on to catch a spoken-only hook.
- Avoid placing key text in the outer 10-15% of the frame on any edge - Facebook's feed card, the like/comment bar, and the account name/profile picture overlay can cover that area depending on device and placement.
- If you reuse a 9:16 master for feed, re-check your safe zones specifically for the 4:5 or 1:1 crop - text positioned for a tall vertical frame can end up cut off at the top or bottom of a square crop.
Facebook Feed vs. Other Meta Placements: A Quick Comparison
Many advertisers export one file and let it run across every Meta placement. That's fine for a first test, but if you have the time, tailoring the crop and pacing to each placement usually looks less compromised. Here's how feed compares to the placements it's most often bundled with.
| Placement | Best aspect ratio | Typical viewing context | Duration to test first |
|---|---|---|---|
| Facebook feed | 4:5 or 1:1 | Scrolling between posts, often muted | 15-30 seconds |
| Facebook/Instagram Reels | 9:16 full vertical | Full-screen, sound often on | 15-30 seconds |
| Facebook/Instagram Stories | 9:16 full vertical | Full-screen, tap-through risk | Under 15 seconds |
| Instagram feed | 4:5 or 1:1 | Similar to Facebook feed, slightly more visual-first audience | 15-30 seconds |
If you want a deeper comparison of feed-style placements specifically (not just Facebook), the guide on video ad specs for feed placement ads covers the shared ground across networks.
Common Mistakes That Hurt Feed Ad Performance
Most feed ads that underperform haven't broken a technical rule - they've broken a viewing-context rule. Watch for these:
- Full 9:16 forced into feed. The ad was built for Reels or TikTok and dropped into feed unchanged, so the top third of the frame (often the hook) gets masked by the feed card chrome.
- Silent-only reliance on dialogue. The script depends on someone hearing a line of spoken setup before the offer makes sense, but with sound off by default, that setup never lands.
- Logo or CTA button in the corner. Corners are the first place covered by UI elements like the mute icon or the three-dot menu.
- Slow opening shot. Feed is a scrolling environment, so an ad that opens on a logo card or a slow pan before showing the product gives people an easy reason to keep scrolling.
- One static export used everywhere. The same single aspect ratio gets uploaded to feed, Reels, and Stories, and the crop quietly cuts off part of the message on at least one of them.
A Pre-Upload Spec Checklist
- Export in 4:5 or 1:1 for feed (and a separate 9:16 version if you're also running Reels or Stories).
- Resolution at least 1080px on the short side, MP4 with H.264 video and AAC audio.
- File size comfortably under typical upload caps - re-compress if it's unusually large.
- Duration tested between 15 and 30 seconds for a first run.
- Captions on, hook readable without sound in the first two seconds.
- Key text and CTA kept out of the outer edges of the frame.
- Preview on an actual phone in the Facebook app before the ad goes live, not just in Ads Manager's desktop preview.
How FrameNotion Fits Into This
If you'd rather not hand-build every crop and caption pass yourself, FrameNotion turns a product link into a finished 30-second vertical ad (1080x1920, 30fps) with AI voiceover, music cut to the beat, sound effects, and word-by-word captions baked in - built to work with sound on or off. Every ad also comes bundled as 4:5, 1:1, and 16:9, so you get a feed-ready crop and a Reels/Stories-ready crop from the same project without re-editing anything by hand. You can see the range of styles in the example ads, check how the process works on the features page, or start from the homepage by pasting in a product link. Plans and one-off packs are listed on the pricing page.
Final Thoughts
Feed is still one of the most forgiving placements on Meta in terms of raw video specs, but it's unforgiving about attention. Nail the format basics - aspect ratio, resolution, file size, duration - and then spend the rest of your effort on the first two seconds, the readability of your captions, and making sure nothing important sits where the feed's own UI will cover it.
Frequently asked questions
Does Facebook feed support vertical 9:16 video ads?+
Yes, but the feed card typically displays it inside a shorter frame, which can crop the top and bottom of a full 9:16 video. If you need the same asset to run on Reels or Stories too, keep key content centered so it survives both a 9:16 and a 4:5 crop.
What's the best aspect ratio for a Facebook feed ad if I can only export one version?+
4:5 is generally the safest single choice for feed, since it fills more of the mobile screen than 1:1 while avoiding the heavy cropping risk that a full 9:16 video can face in a feed card.
Do Facebook feed ads need captions?+
They're not required by the platform, but feed video usually autoplays muted, so captions or clear on-screen text are the only reliable way to deliver your message before someone decides whether to tap for sound.
Can I reuse the same video for Facebook feed and Instagram feed?+
Generally yes - both placements respond well to 4:5 or 1:1 video viewed in a similar scrolling context. Duration and safe-zone guidance carry over directly between the two.
How long should a Facebook feed video ad be?+
There's no fixed requirement, but 15 to 30 seconds is a sensible starting point to test for a direct-response ad. Retargeting creative can often run shorter, while a full story-driven ad may need closer to 30 seconds.