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Free YouTube Mid-Roll Ad Placement Finder: ad breaks at natural pauses

Choose your video and get suggested mid-roll ad break times at natural pauses in the voice, so an ad never cuts a sentence in half. Pick how often you want a break, listen to each spot and copy the times into YouTube Studio. Everything runs in your browser: your file never leaves your device.

Updated · Built by Kevin Tabares, long-form YouTube editor at Umbrella Creators. Mid-roll rules from YouTube Help, read October 20, 2026.

Find mid-roll ad break spots in a video

Your file stays on your device. Nothing is uploaded: your browser decodes the audio and finds the pauses right here, in this tab.

How to use it

  1. Choose your finished video or its exported audio (MP4, MOV, WEBM, MP3, WAV or M4A, up to 60 minutes).
  2. Pick how often you want an ad break and press Find ad break spots. The browser decodes the audio and finds every pause in the voice; a long video takes a few seconds. You can change the spacing afterwards and the list updates at once.
  3. Press Listen on each break to hear the 3 seconds before and after it. Copy the times, or download the CSV, and add them as ad slots in YouTube Studio.

The tool checks the length first: if the video is shorter than 8:00, it tells you how many seconds are missing, because mid-roll ads need a video of 8 minutes or more. It never puts a break in the first or last minute. When part of the video has no pause at all, it says so instead of forcing one, and very short pauses and unusually long silences are marked so you listen first. To find dead air you may want to cut before you place the ads, use my silence detector, and to add chapters, my timestamps generator.

Step-by-step guide

For the whole process around this tool, read Where to put mid-roll ads in a YouTube video: YouTube's rules, how many breaks to use and how to set them in YouTube Studio.

FAQ

How long does a video have to be for mid-roll ads?
YouTube Help says you can turn on mid-roll ads on monetized videos that are 8 minutes or longer. Another YouTube Help page, on ad formats, says "longer than 8 minutes", so if your video is right at 8:00, a few extra seconds keep you on the safe side. The tool shows your length against 8:00 and warns you when the video is too short (both pages: mid-roll ad breaks and ad formats, read October 20, 2026).
Where should I place mid-roll ad breaks?
YouTube Help says ad slots placed at natural breakpoints, such as a pause in the audio or a transition in the picture, are more likely to serve ads, and slots that interrupt the viewer, such as mid-sentence or mid-action, are less likely to. This tool finds the pauses in the voice for you, so each suggested break sits between two sentences instead of in the middle of one.
How does the tool choose each break?
It measures the sound level every 10 milliseconds and marks every pause of a quarter of a second or more. Then it aims for breaks that split the video into equal parts close to the spacing you choose (a 13-minute video at 5 minutes gets 2 breaks, so 3 parts) and looks for each one up to half a part before or after its target. There it takes the longest pause (anything over 3 seconds counts the same) and, between two pauses of similar length, prefers the one where the voice drops before and starts again louder after, which is how a sentence usually ends. Silences over 3.5 seconds that are much longer than your usual pauses are used only when that stretch has nothing else, because they are often deliberate. It skips the first and last minute (my choice, not a YouTube rule) and gives each break as the whole second inside the pause. On a 13-minute documentary narration I checked against its script, the 7 spacings from 2 to 10 minutes gave 15 suggestions at 5 different times, and all 5 fell in a real silence between two paragraphs.
Should I use automatic ad slots, manual ones or both?
YouTube Studio lets you use automatic slots, manual slots or both. By default automatic slots are selected, and they are added on top of your manual slots unless you uncheck "Automatic ad slots". No slot is guaranteed to show an ad: after you save, Studio marks in red the manual slots that are unlikely to serve one, so you can move them (all from YouTube Help, read October 20, 2026).
Does it upload my video?
No. Your browser decodes the audio and finds the pauses on your own device; the file never leaves this tab, and nothing is downloaded either.
What can it get wrong?
It listens for pauses; it does not understand the words. A dramatic pause in the middle of a thought looks the same as the end of a sentence, and a tight edit with jump cuts may only have short pauses. A long deliberate silence, like a countdown before the answer to a quiz question, is skipped when that part has another good pause and marked when it is the only one: on an 11-minute talking-head English lesson with 12 such countdowns, none of the 6 break times it gave landed in one, but 2 came right after a short "Ready?" to the viewer. When music runs under the voice, it looks for dips in the voice level instead of silence. It does not look at the picture either, so a pause in the middle of an action scene can still be a poor spot. Listen to each break with the 3 second button before you add it.

Who made this

I'm Kevin Tabares. I've edited long-form YouTube videos since 2015 (1,277 videos and 152.2M+ views tracked on YT Jobs) for channels like Rex & Alexa, Puff and Mud. Placing ad breaks by scrubbing a long edit for the end of each sentence is slow, so I built this to find good spots in seconds, without uploading anything. If you want an editor for your channel, get in touch.

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