How long should a video ad be?

Video ad length by goal

Start from what you want the viewer to do after watching:

• Awareness (remember the name): 6 to 15 seconds. One idea, one visual, the brand on screen early.
• Consideration (get them curious): 15 to 30 seconds. A hook, the problem, the product, one call to action.
• Conversion (get them to try or buy): 15 to 60 seconds. Room for a demo, a testimonial or an offer.
• Retargeting (people who already know you): 30 to 60 seconds is fine. They need reasons, not an introduction.

Shorter usually wins on cold audiences

People who've never heard of you give you very little time. A tight 15-second ad that lands one idea will usually beat a 60-second ad that makes four points, because most viewers never reach point two.

That doesn't mean cutting the substance. It means cutting everything that isn't doing work: the greeting, the logo intro, the pause before the punchline, the second example that repeats the first.

When a longer ad is worth it

Go longer when the extra time earns its place:

• A product that needs to be seen working, where the demo is the persuasion.
• A founder or customer story with a real arc: the problem, the turning point, the result.
• Retargeting people who visited your site and need answers to their objections.
• Placements where people chose to watch, such as YouTube, rather than scrolled into it.

Cut one recording into several lengths

You don't have to guess. Record once, then cut a 15-second, a 30-second and a 60-second version of the same ad. Keep the same hook in all three so you're testing length, not the opening line, and let the results tell you which length your audience prefers.

Keep the first few seconds identical across versions. The hook does most of the work in every length; what changes is how much of the story you tell after it.

Doing it in MirrorCut

MirrorCut is an AI video editor for your own recordings. Upload the footage and ask; its agent makes the edit on a real timeline, and every change is outlined for you to accept or revert. For example:

• “Cut this ad into 15, 30 and 60-second versions with the same opening”
• “Make this ad 15 seconds: keep the hook and the offer”
• “Tighten this ad by removing every pause and repeated point”
• “Add an end card with the offer to all three versions”

Free tools

No sign-up; they run in your browser.

• Video ad script timerPaste a video ad script and see how long it takes to say, whether it fits 6, 15, 30 or 60 seconds, and how many words each length allows.

Questions

Is a 60-second ad too long for social media?

Not always. It's often too long for people who don't know you yet, and fine for retargeting or a strong story. Test it against a 15 or 30-second cut of the same ad.

What's the ideal length for a Reels or TikTok ad?

For most ads, 15 to 30 seconds, with the hook in the first few seconds. Check each platform's current limits and recommendations before you publish, as they change.

Does a shorter ad always perform better?

No. Shorter is the safer default for cold audiences, but the right length is the one that tells the story without padding. Test lengths with the same hook to find out.