BiliFlow Bilibili Video Downloader 4K & MP3

Download Bilibili videos in 4K UHD, 1080p 60fps & 320kbps MP3 audio with 1-click in-browser merging. Fast, free & lossless.

BiliFlow Bilibili Video Downloader is the ultimate, fast, and hardware-accelerated Bilibili media downloader and audio extractor. Download Bilibili videos in 4K UHD, 1080p 60fps, and studio-grade 320kbps MP3 audio with 1-click in-browser GPU merging! Whether you need to save Bilibili anime, music MV, gaming streams, tutorials, or podcasts, BiliFlow delivers blazing-fast downloads without needing any external software or third-party websites. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚡ KEY FEATURES OF BILIFLOW: ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🎬 4K UHD & 1080p 60fps Video Downloads • Download Bilibili video in true 4K (2160p 60fps), 1080p Full HD, and 720p. • Full native codec compatibility: AV1, HEVC (H.265), and AVC (H.264). • Automatically combines separate Bilibili DASH video and audio streams into a single lossless MP4 file. ⚡ In-Browser GPU Muxer (No External Software) • Powered by WebGPU & WebAssembly (WASM). • Merges video and audio tracks locally in your browser in milliseconds. • No silent videos, no video corruption, and zero quality loss. 🎵 Lossless 320kbps MP3 Audio Extractor • 1-click Bilibili MP3 download for anime OSTs, background music, ASMR, and audiobooks. • High-bitrate audio extraction directly to MP3 and M4A formats. ✨ AI Bilingual Subtitles (.SRT & .VTT) • Extract synchronized bilingual subtitles (Chinese, English, and more). • Download clean .SRT or .VTT files ready for VLC, IINA, or any media player. 🖼️ 1-Click HD Thumbnail & Cover Downloader • Download high-definition Bilibili video covers and thumbnails in original Full HD resolution. 🔒 100% Private, Safe & Client-Side • All processing occurs directly inside your browser. • Zero personal data collection, no telemetry, no tracking, and no external server uploads. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🛠️ HOW TO USE BILIFLOW: ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 1. Navigate to any video or bangumi on Bilibili.com. 2. Click the BiliFlow extension icon in your Chrome toolbar (or use the on-page quick bar). 3. Choose your desired quality (4K UHD, 1080p 60fps, 720p) or select "Audio Only (320kbps MP3)". 4. Click "Download" — your file is saved instantly to your computer! ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🇨🇳 哔哩哔哩 (B站) 专属功能与特色: ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • 4K超高清与1080P 60帧画质下载：支持AV1、HEVC(H.265)、AVC(H.264)原画无损视频流提取。 • 浏览器端GPU本地极速混流：突破B站DASH音视频分离限制，毫秒级无损合并为标准MP4，告别无声视频。 • 320kbps高品质MP3音频提取：一键保存B站番剧插曲、音乐区MV、有声小说及播客音频。 • AI智能双语字幕导出：一键提取并下载中英双语.SRT/.VTT字幕文件。 • 高清封面一键保存：直接获取B站视频原图封面。 • 纯本地运行与隐私安全：所有下载与混流全部在本地浏览器沙箱完成，不收集任何用户隐私数据。 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔍 FREQUENTLY ASKED QUESTIONS (FAQ): ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Q: Why do other downloaders produce silent Bilibili videos? A: Bilibili separates high-resolution video streams and audio streams via DASH protocol. BiliFlow includes a built-in GPU muxer that automatically combines both tracks into one complete MP4 file with audio. Q: Do I need to install Python, FFmpeg, or external tools? A: No! BiliFlow performs all stream synthesis natively inside Google Chrome using WebGPU and WebAssembly. Q: Can I download Bilibili videos in 4K resolution? A: Yes! For videos that offer 4K quality, BiliFlow will detect the stream and allow 1-click downloading in 4K UHD. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🔒 PERMISSIONS TRANSPARENCY: ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • declarativeNetRequest: Allows downloading media segments directly from Bilibili CDNs by managing internal referer headers safely. • downloads: Allows saving the merged video or MP3 file to your local Downloads folder. • storage: Saves your quality preferences locally.