Open Source JavaScript Video Converters

AppGrabbit is a Windows 10/11 app that downloads, transcribes and converts videos on your own computer. Paste a link from YouTube (videos, Shorts, playlists, Mixes), TikTok, Instagram, Facebook, X, Pinterest, Twitch or SoundCloud and the file lands in your downloads folder in the quality you pick, up to 4K. Turn any video into a clean .txt with a prompt on top for ChatGPT, Claude or Gemini: with captions it is instant; without them, or from your own recording (a class, a meeting, a voice note), it is transcribed on your PC with Whisper, nothing uploaded. Cut exact clips, grab thumbnails, follow channels, and convert to MP4, MP3, WAV, ProRes 422 HQ or DNxHR HQ for Premiere and DaVinci Resolve. No account, no ads. **Free plan:** 5 credits a month (a credit is one video, one batch of up to 10 links, one transcript or one converted file); when you hit 0 you can claim 1 more every 48 hours. Thumbnails, Watch and the Library are free with no cap. **Pro:** USD 8.99 a month, cancel anytime

The most advanced downloader & converter tool that combines the power of leading open-source technologies under an intuitive GUI. Download videos, Audio, from 10000+ of sites, and also files from any platform with advanced format conversion capabilities. Features a built-in browser with JavaScript injection support that remembers logins while maintaining complete privacy. Five powerful tabs streamline your workflow: Home tab for pasting URLs, channels, playlists, and direct search; Browser tab for seamless web navigation; Downloads tab with resume/cancel support and download history; Utilities tab offering lossless conversion for all file formats plus URL analysis tools; Settings tab for proxy configuration, search limits, download engine selection, and advanced customization. Experience lightning-fast downloads, universal format support, and privacy-focused browsing in one revolutionary application. Perfect for content creators, researchers, media enthusiasts and anyone who demand.

File Converter Pro is a fast, local Windows application for converting images, videos, audio, document and 3D files. It supports batch processing, audio transcription, ZIP export, temporary storage, secure source deletion, and automatic updates. Conversions remain private on your computer

AkmeFFmpeg is a simple yet powerful tool to re-encode audio-video such as AVI, Flash FLV, MOV, MP3, MP4, WMV, 3GP. It puts a friendly GUI on the ffmpeg CLI to easily convert for YouTube or download to Andriod, BlackBerry, iPhone, iTouch, iPod, PSP, Wii, etc.

HTML5 is the fastest growing web development trend and HTML5 video as a part of HTML5 becomes the new natural way to show video online. iPad, iPhone, Android, all new browsers declare the support for HTML5 video. It's great, but what is the usual route to create HTML5 video? First you need to find converters and make three versions of your video - .OGG, MP4, WebM. Then, to provide the compatibility with IE and old browsers you add a fallback Flash version of your video with Flash video player. And finally, you extract an image for poster and write batch lines of code to combine all of it... Quite complicated? Forget about it with EasyHTML5Video! All it takes is 3 easy steps to convert any of your video to HTML5: 1. Drag-n-drop video file to Easy HTML5 Video; 2. Set poster image, select codecs, tune settings; 3. Press "Start". As a result you'll get an html page with all necessary code, images, and videos. EasyHTML5Video makes your life easier with HTML5 video!

JBEdit is an AJAX online video editor (based on jQuery), where the edit capabilities reside on server side. You can extract a selection and tag it. All the edit is done on MP4 videos via ffmpeg.

A PHP and JavaScript/Ajax written youtube video downloader script with on-demand server conversion. Supported filetypes are mp3, flv and many more coming soon.

Video community (like youtube) in hours not months. Requires Mplayer, Mencoder, FFmpeg, Lame and Flvtool2. Designed for both low and high end websites supporting almost any file extension, with ease of upload for console/mobile support

Tsuka is a web site software package which has the ultimate goal to provide all means for publishing videos on a web site in Flash video format. Front end is written entirely in Actionscript 3, while back end uses Zend Framework, thus written in PHP 5.

Voquad : Video On Quasi Demand. This is a Video on Demand Web Based Application. You have to select your video listed in a web page then click for encoding in Theora format. It's use the "<video>" tag from HTML 5 for streaming.

Offline video & audio converter packing a bundle of features