- TikTok in-feed ads require 9:16 vertical video at a minimum 540×960 px — vertical fills the screen and outperforms other ratios.
- Keep text, logos, and products inside TikTok's safe zones or the platform UI will hide them from viewers.
- The first 6 seconds carry 90% of ad recall impact, so lead with your strongest hook every time.
- Showing your product on screen drives a 65% brand affinity lift, per TikTok's own creative research.
- Sound is not optional: 88% of TikTok users say audio is vital, and harsh openers spike skip rates.
- Coinis Revise lets you adjust text placement, resize creatives, translate copy, and generate variations without rebuilding from scratch.
TikTok Reels Ad Formats & Dimensions
Get the specs right before you open your editor. A single dimension error sends your creative to rejection.
In-Feed Ads: Aspect Ratios and Minimum Sizes
9:16 vertical is the standard. Per TikTok's Video Ads Specifications, in-feed ads support three aspect ratios: 9:16 vertical (minimum 540×960 px), 16:9 horizontal (minimum 960×540 px), and 1:1 square. Vertical fills the screen. It commands more attention than anything else. Start there.
TopView Premium Format Specs
TopView accepts 9:16 only. Minimum resolution is 540×960 px. Bitrate must reach at least 2,500 kbps. Duration runs 5 to 60 seconds. TikTok recommends 9 to 15 seconds for best results. One hard rule: no plain white frames in the first 3 seconds. TikTok's own logo appears there on a white background. White creative makes it invisible, and TikTok will reject it.
Video Duration, File Size, and Bitrate Requirements
In-feed ads run up to 60 seconds. Maximum file size is 500 MB. Minimum bitrate is 516 kbps. Accepted formats include MP4, MOV, MPEG, 3GP, and AVI. Keep file sizes lean. Heavy files slow load times and kill completion rates.
Choosing the Right Format for Your Goal
In-feed for performance campaigns. TopView for brand awareness and launch moments. TopView requires pre-approval from TikTok. Review typically takes two days. Build that into your timeline.
---
Designing for Safe Zones
TikTok's interface sits on top of your video. Ignore safe zones and your message disappears behind buttons.
Why Safe Zones Matter
Profile icons, captions, action buttons, and swipe links all overlay your creative. Key elements outside the safe zone get hidden or clipped. Viewers never see your headline or logo.
Where to Place Text and Logos
Keep critical content centered and well clear of the bottom and right edges. TikTok's UI controls stack on the right side and bottom of the screen. Your product shot, headline, and logo belong in the center third of the frame.
How Caption Length Affects Safe Zone
In-feed ad captions display in white with a uniform font you cannot customize. TikTok's documentation recommends keeping captions to 100 characters before the "See more" truncation point in non-CJK languages. Shorter captions leave more visible space for your visual creative.
Using TikTok's Safe Zone Preview Tools
TikTok Ads Manager provides downloadable safe zone overlay files. Drop them over your creative before you export. This catches placement errors before your ad enters review and saves you the two-day wait.
---
Creative Design Best Practices
Technical specs get your ad approved. Creative principles get it watched.
Go TikTok-First: Native Style Beats Polished
Repurposed TV spots and catalog images underperform. TikTok's own research shows 74% of viewers say TikTok-first creative catches their attention. Shoot vertically. Use natural lighting. Lean into trends and formats that already feel native to the feed. Real beats polished every time.
Structure Your Video: Hook, Body, Close
The first 6 seconds carry 90% of your ad recall impact. Open with a problem, a bold claim, or a visual surprise. Then show your product in action. TikTok research shows that having your product on screen drives a 65% brand affinity increase and a 25% recall uplift. Close with a CTA card. CTA cards yield a 45% recall lift and a 19% likability increase.
Text Overlays and On-Screen Captions
Text overlays increase view time, drive recall, and boost likability. Always add captions for accessibility. TikTok's auto-captions feature handles this quickly. Keep font sizes large enough to read on a small screen at arm's length.
Sound Design and Audio Considerations
88% of TikTok users say sound is vital to the platform experience. Use music that fits your audience. Avoid jarring or harsh audio in the first 3 seconds. A rough audio opener spikes skip rates before your hook even lands.
---
Common Design Mistakes to Avoid
Horizontal or Square-Only Videos
Square is acceptable. Horizontal does not perform. Vertical 9:16 fills the screen and takes full attention. Default to vertical.
Placing Text Outside Safe Zones
A headline that overlaps a profile icon or hides behind a button is invisible. Check safe zones against TikTok's overlay files before every single export.
Ignoring the First 6 Seconds
Most viewers decide in the first 3 seconds. Lead with your strongest visual or boldest claim. Save brand backstory for after you have their attention.
Muting Sound or Using Harsh Audio
Silent ads feel broken on TikTok. Harsh sounds in the opening get skipped immediately. Match your audio energy to your audience and treat sound as core creative, not an afterthought.
---
Optimize Your Design with Coinis
TikTok ad design moves fast. Safe zones shift. Formats multiply. Creative fatigue sets in quickly. Coinis Revise lets you adjust text placement, resize creatives with Smart Resize, translate copy for new markets with AI Translate, and spin up fresh variations with Variate — without rebuilding from scratch.
Coinis publishes directly to Meta today. TikTok direct publishing is on the roadmap. In the meantime, Revise handles your creative production and iteration for every platform you run.
Or skip the steps.
Coinis Revise edits any ad image with AI. Move text. Change text. Swap colors. Erase objects. Translate to any language. One click each.
No design skills. No Photoshop. One click.
15 AI tokens a month. No credit card.
Frequently Asked Questions
What aspect ratio should TikTok Reels ads use?
9:16 vertical is the recommended aspect ratio for TikTok in-feed and TopView ads. It fills the full mobile screen. The minimum resolution for 9:16 is 540×960 px. Horizontal (16:9) and square (1:1) are also accepted for in-feed, but vertical consistently outperforms both.
How long can a TikTok in-feed ad be?
Per TikTok's Video Ads Specifications, in-feed ads can run up to 60 seconds. For TopView, TikTok recommends keeping videos between 9 and 15 seconds, though durations from 5 to 60 seconds are accepted.
What are TikTok ad safe zones and why do they matter?
TikTok's UI elements — profile icons, captions, action buttons, and swipe links — overlay the video. Safe zones define the areas of your creative that won't be hidden or cropped by these elements. Text, logos, and products placed outside safe zones may be invisible to viewers. TikTok Ads Manager provides downloadable safe zone overlay files to check placement before export.
Does TikTok require sound in ads?
Yes. TikTok's documentation states that audio is required for in-feed ads — muffled or unclear audio is not allowed. Beyond the technical requirement, 88% of TikTok users say sound is vital to their experience on the platform. Treat sound as core creative, not an optional add-on.