VidSmaller is a browser-based cloud video compressor for people who need to reduce file size for sharing, publishing, or storage. Users can upload common formats, including MP4, MOV, MKV, WebM, and AVI, then set a target output size or adjust CRF, resolution, bitrate, codec, and encoding preset. Compression runs on VidSmaller’s servers, and downloads have no added watermark; files are removed according to the service’s retention rules. It serves individuals, creators, educators, marketers, support teams, and developers preparing videos for email, messaging, social channels, websites, and storage. Its developer API supports compression jobs, progress retrieval, webhooks, upload-limit checks, and compression estimates. The service runs in modern browsers without local installation, including on Chromebook and iPad devices.