VidShift is a free video and audio toolkit that runs 100% in your browser. It enables users to perform common media editing tasks without installing software or uploading files to external servers. The toolkit supports nine core functions: convert, compress, trim, create GIFs, extract MP3 audio, mute audio, rotate video, change playback speed, and extract individual frames. It handles MP4, WebM, MKV, MOV, MP3, FLAC and over 12 additional formats. Built with WebAssembly, VidShift processes files at native speed directly on the user's device. Files never leave the browser, ensuring privacy and eliminating upload wait times. The service requires no account registration and displays no advertisements or watermarks on output files. Users simply load the website, select a tool, and drop their media file into the browser. Processing occurs locally using WebAssembly modules compiled for high performance. Once complete, the edited file downloads immediately to the user's device. VidShift is designed for quick, lightweight media tasks that would otherwise require desktop software or cloud services. It addresses common frustrations with sketchy conversion sites, intrusive ads, mandatory uploads, and watermarked outputs. The tool is ideal for content creators, social media users, students, and professionals who need fast, private media editing without software installation or privacy concerns. It works on any modern browser that supports WebAssembly.