About BilibiliDownloader.co

BilibiliDownloader.co is an independent browser utility built to give researchers, students, video editors, and archivists easy access to publicly accessible media streams from Bilibili. Our engine provides clean, high-bitrate MP4 video files, standalone MP3 and M4A audio tracks, official CC subtitles, and ASS bullet chat comments.

We believe users should have reliable, private tools to backup and study media they have authorized access to, without requiring third-party software installations, browser extensions, or account sign-ups.

When you submit a public Bilibili URL or b23.tv mobile shortlink, BilibiliDownloader.co inspects the public stream manifest directly from edge content distribution networks. Because modern high-definition streams separate video and audio channels via DASH, our platform seamlessly muxes the streams into a standard synchronized MP4 file directly on your device or via optimized edge relays.

All image and format operations such as watermark inpainting operate entirely client-side using WebAssembly, ensuring maximum privacy and instant processing speed.

BilibiliDownloader.co operates under strict fair use and personal backup guidelines. We do not store, re-host, or index user media on our servers. All downloads are fetched live and delivered on demand.

BilibiliDownloader.co is an independent project and is in no way affiliated with, authorized, maintained, sponsored, or endorsed by Bilibili Inc. or any of its affiliates. All registered trademarks and copyrights belong to their respective owners.