About ClipCocoon
Free video tools for creators, built on one simple promise: your clips never leave your device.
What is ClipCocoon?
ClipCocoon (clipcocoon.com) is a free website of video tools that run entirely in your web browser. You can add animated captions, cut the silences out of talking videos, trim, resize for TikTok, Reels and Shorts, compress, pull the audio out of a video and turn clips into GIFs, without uploading your video, creating an account or getting a watermark.
Why we built ClipCocoon
Most online video editors start by uploading your clip to their servers. That means waiting for the upload, waiting in a queue, and leaving a copy of your unreleased video on someone else’s computer. Free plans then add a watermark or ask you to sign up before you can download.
Modern browsers can now decode and encode video, and even run AI models, on their own. So we built tools that do exactly that. Your video is opened, edited and saved on your own device, and nothing is sent anywhere.
Where the name comes from
A cocoon is where change happens safely, out of sight. Your raw clip goes in and comes back out trimmed, captioned and ready to post, without ever leaving your hands. ClipCocoon is part of a small family of sites that work the same way: PDFCocoon for PDFs and ImageCocoon for images.
How it works
Every tool on ClipCocoon runs inside your browser tab, using the video encoders built into your browser and small open-source AI models that run on your device. Our servers only deliver the web page and, for the AI tools, the model files. They never receive your videos. How your videos stay on your device explains the browser rule that enforces this, and how to check it yourself.
Built with open source
- Mediabunny reads and writes video files using your browser’s built-in encoders (MPL-2.0 license).
- ONNX Runtime Web runs AI models in the browser (MIT license).
- Transformers.js runs the speech-recognition model for captions (Apache-2.0 license).
- Whisper by OpenAI the speech-recognition model behind Auto Captions (MIT license).
- Silero VAD the voice-detection model behind the Silence Remover and Auto Captions (MIT license).
- Montserrat, Bebas Neue, Poppins and Plus Jakarta Sans the caption fonts, served from our own site (SIL Open Font license).
Sample clips
The “Try one” samples are royalty-free clips from Pexels, by Tima Miroshnichenko, Alena Darmel and Nino Souza, with a voice-over from the public-domain LibriVox reading of The Art of Public Speaking by Dale Carnegie and J. Berg Esenwein (1915).
How we keep it free
ClipCocoon is free to use with no sign-up and no watermark. It costs very little to run, because your device does the work instead of our servers. In the future we may show a small number of clearly labelled ads to cover those costs. Ads would never have access to your videos, because your videos never leave your device.
Who runs it
ClipCocoon is run by Dulanka Katugampala, based in Sri Lanka. Questions, ideas or bug reports are always welcome. Get in touch.