A lightweight, browser-based video editor that automatically analyzes audio, removes silent sections, and provides a real-time preview and export system. This was initally called autocut remove dead air or silence removal or jump cutter but eventually landed on the name Automatic Video Cut. This cross platform web app program makes video editing easier by automatically detecting when to cut video and removing silent parts aka parts that are under a set volume that the user selects.
the video quality might be poor on export, and I have no idea why. also cut export videos always take up more storage than the non cut input videos, and I have no idea why.
To begin, visit the live usable web app version on https://automaticvideocut.vercel.app/ , click choose file , select the poorly edited video that has awkward silence , pauses , dead air , dead silence , SCROLL DOWN and click on the blue slider that is UNDER laser threshold and drag it to the right or left. moving the laser slider left such as dB -70 laser makes the program more inclusive and cut out less akward silence , while the moving the laser slider right such as -22 dB makes the program less inclusive and cut out anything that is below the red laser line. THE REASON FOR THIS FEATURE IS TO MAKE SURE SILENCE REMOVAL WORKS EVEN IF THERE IS BACKGROUND NOISE OR BACKGROUND MUSIC AS LONG AS THE SPEECH IS ALWAYS LOUDER THAN THE BACKGROUND NOISE OR MUSIC.
a good test video is -----> Blender 2.81 | New Sculpting Features for Beginners | by SouthernShotty | For context SouthernShotty is a 3d artist Blender youtuber who is insanely bad at editing his videos. he is so bad at editing his videos that if an akward pause or silence is less than 5 seconds long, he just leaves it in the video. so he can go "now add a (akward silence pause for 3 horrendous seconds because he is horrible at editing) cube". which is a TERRIBLE way to watch a video. so I created this entire program just to make watching his videos and a lot of other blender tutorials less of a terrible experience with an emphasis on it being almost FULLY AUTOMATED with INSANE AMOUNTS OF CUSTOMIZATION for the EASE OF USE and FEATURES it has. bonus if you use it for anything else. i have been waiting 10 YEARS for someone to create something this free, this versitaile, this automated, this easy to use, this much customization, has a decent UI, runs in real time so NO WAITING FOREVER JUST TO HAVE A PREVIEW RESULT, but NOBODY CREATED IT. EVER. I HAVE BEEN WAITING. FOR 10 YEARS NO ONE CAME. SO I DID.
the video quality might be poor on export, and I have no idea why. also cut export videos always take up more storage than the non cut input videos, and I have no idea why.
You can press the play button under the preview video to test how the video will be cut before pressing export at the bottom. this is to ensure that you have the correct settings before waiting a while for the export to complete. alternatively, this feature that uses skipping in media player to to cut out silence instead of re encoding the video allows more tech savvy users to screen record the website instead of expoerting for a much faster and more effiecnt result.
the video quality might be poor on export, and I have no idea why. also cut export videos always take up more storage than the non cut input videos, and I have no idea why.
to export the offical way instead of screen recording the media player skips over silence, you can scroll to the very bottom of the screen and click export video. this will take forever EVEN ON A 16 CORE CPU SYSTEM 16 GB RAM AND RTX 4070 8GB VRAM because I do not know how to optimize this program at all. its DEFINITELY NOT using ALL CPU or ALL GPU power availible, and I HAVE ZERO CLUE WHY. IF I COULD SPEED IT UP, I WOULD. BUT I CAN'T, BECAUSE THIS IS WHAT HAPPENS WHEN I NEED A TOOL TO VERY SPECIFIC SPECIFICATIONS, BUT LITTERLY NOBODY CREATES IT FOR OVER 10 YEARS, AND I GET TIRED OF WAITING SO I CREATE IT MYSELF AND NOW IT HAS SOME UNFIXABLE PROBELEMS THAT PROBABLY REQUIRE A COMPLETE RE WRITE WHICH I AM NOT DOING BECAUSE I NEED THIS TOOL WORKING RIGHT NOW no matter the flaws IF I WANT TO keep improving my BLENDER 3d modelling, animation, texturing, ETC.
the video quality might be poor on export, and I have no idea why. also cut export videos always take up more storage than the non cut input videos, and I have no idea why.
and it also doesen't work at all on mobile phones such as the samsung galaxy s22 because although it does technichally run, it is slow, it takes even more time than on PC (which is already a lot for exporting), its laggy, the UI was made for desktop so everything is either too big or too small so you have to zoom in and out, and for some reason the skipping and export does not cut out the silence properly on mobile so it causes a very stupid sounding repeat of speech that was already said. no idea what is causing it at all. if i knew what was going on, i would fix it immediately.
the video quality might be poor on export, and I have no idea why. also cut export videos always take up more storage than the non cut input videos, and I have no idea why.
last note before the technical specs: there is a horrible terrible way to speed up the export: cut your input video into four peices, open up 4 seperate instances TABS of the website, uplead each 1/4 video into each TAB of automatic video cut, and run all 4 at once, in splitscreen or quarter screen. it should theoretically work as long as you have enough CPU cores. then combine all 4 of them into one single video again. use olive video editor, shotcut, kdenlive, bender VSE, davinci resolve, lightworks, kinemaster, final cut pro, adobe premeire pro, ffmpeg, or litterly any video editor or cutter ever to do this. make sure not to lose track of the video order.
the video quality might be poor on export, and I have no idea why. also cut export videos always take up more storage than the non cut input videos, and I have no idea why.
- Upload and preview video files instantly
- Automatic silence detection using audio waveform analysis
- Smart removal of low-volume sections (dB threshold control)
- Real-time preview that skips removed segments seamlessly
- Scrubbable timeline with waveform visualization
- Zoomable waveform editor
- HTML5
<video>element control layer - Custom skip logic for removed audio ranges
- Real-time playback correction loop
Audio is analyzed using PCM data and converted into amplitude buckets. Sections below a configurable dB threshold are marked for removal.
Instead of editing video directly, the system computes keepRanges, which define valid playback segments.
The preview player:
- Plays only keepRanges
- Automatically skips removed segments
- Corrects playback drift in real time
- Next.js (React)
- TypeScript
- Web Audio API
- HTML5 Video API
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No part of this software may be copied, modified, distributed, or used commercially without explicit permission from the author.