1080p, 4K & 8K Video
Lossless DASHDownload Bilibili Videos in HD MP4 (Up to 8K)
Save 1080p 60FPS, 4K UHD, and 8K MP4 videos with synchronized high-bitrate audio and zero watermarks.
Explore MP4 downloads MP4 · H.264 · AV1
Captions & Danmaku Extractor · SRT, JSON & ASS
Download Bilibili Subtitles & Danmaku Comments
Export official bilingual CC subtitles as SRT and JSON transcripts, and download scrolling bullet comments in ASS format for VLC and PotPlayer.
Try test samples:
⚡ 1080p, 4K & 8K MP4🎵 320kbps MP3 Audio💬 CC Subtitles & Danmaku✨ No Watermark
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Lossless 1080p/4K DASH Muxing
Combines full HD & 4K video with separate audio streams into synchronized MP4 without quality loss.
Hi-Fi 320kbps MP3 & M4A Audio
Extracts pure 320kbps MP3 and lossless M4A audio tracks with immediate in-browser playback.
Zero-Log Privacy & Clean Video
Inpaints watermarks locally via WebAssembly. Streams flow direct from public edge CDNs to your device.
On your device
Preparing your video
Getting everything ready for your export.
Keep this tab open. Your original stays unchanged.
Recent in this browser session
Simple 3-Step Guide
How to Download Bilibili Subtitles and Danmaku Comments
Save time-coded transcripts and floating comments in seconds.
- 01
Copy Bilibili Link
Copy the URL of the video containing closed captions or bullet comments.
Step 1 of 3Input - 02
Inspect Subtitle Tracks
Paste the URL above to view all available caption languages and danmaku files.
Step 2 of 3Analyze - 03
Download SRT, TXT, or ASS
Click Download SRT for captions or Download ASS for floating danmaku comments.
Step 3 of 3Save
💡
iOS & Android ReadyMobile Shortcut: In the Bilibili app, tap Share → Copy Link. Our parser automatically resolves b23.tv shortlinks in milliseconds.
Fast & Free Media Extraction
Comprehensive Bilibili Media Downloader Suite
Download high-definition MP4 videos, convert to 320kbps MP3 audio, extract bilingual CC subtitles, export ASS danmaku, and remove watermarks.
In-Browser AI Inpaint
WebAssemblyRemove Bilibili Video Watermark & Logos
Erase corner TV logos and creator UID overlays with 100% private in-browser WebAssembly inpainting.
Open Watermark Studio 100% Private
Convert Bilibili to 320kbps MP3 Audio
Extract crystal-clear MP3 and M4A audio tracks from Bilibili songs, AMVs, podcasts, and video soundtracks.
MP3 & M4AExtract CC Subtitles (SRT) & Danmaku (ASS)
Export bilingual CC closed captions as SRT transcripts and scrolling bullet comments as ASS files.
Subtitles & danmakuDownload HD Video Master Covers & Artwork
Save original full-resolution video thumbnail posters and anime banners directly from the source CDN.
Download cover artBatch Download Multi-Part Bilibili Series & Playlists
Queue multiple episodes from course playlists, multi-P video series, and anime seasons in one place.
Browse a seriesTechnical Specifications & Architecture
Bilibili Media Stream Formats & Codec Matrix
Learn how Bilibili streams are structured, how video and audio are synchronized, and which player delivers optimal playback.
Supported Format Matrix
HTML5 / WebAssembly / Direct CDN| Media Type | Quality / Specs | Video Codec | Audio Spec | Supported Players |
|---|---|---|---|---|
8K / 4K Ultra HDUltra HD | 7680x4320 / 3840x2160 @ 60fps | AV01 (AV1) / HEVC (H.265) | AAC 192–320 kbps (48kHz) | VLC, PotPlayer, IINA, MPV |
1080P Full HD / 720PUniversal | 1920x1080 / 1280x720 @ 60/30fps | AVC (H.264) / HEVC | AAC 132–192 kbps | All browsers, QuickTime, iOS/Android |
Studio Audio (MP3/M4A)Hi-Fi Audio | Lossless AAC stream / MP3 320k | N/A (Pure Audio) | Up to 320 kbps Stereo | Apple Music, Spotify Local, VLC |
CC Subtitles (SRT/JSON)Captions | Bilingual / Official CC Transcripts | UTF-8 Encoded SRT | Time-Coded Text | VLC, PotPlayer, YouTube, Aegisub |
Danmaku Comments (ASS)Danmaku | Full-Resolution Bullet Comments | Advanced SubStation Alpha | Dynamic Coordinates | PotPlayer, MPV, Danmaku2ASS, VLC |
Master Cover ArtworkMaster Art | Original Master Image (Up to 4K) | JPG / WebP Lossless | 16:9 Clean Banner | Standard Image Viewers, Wallpaper |
01 · Architecture
DASH Audio-Video Demuxing
Bilibili delivers modern high-resolution video and audio as separate DASH streams on edge CDNs. Our engine merges them directly into a synchronized standard MP4 container without re-encoding loss.
02 · Privacy Engine
In-Browser WebAssembly Processing
Watermark inpainting and audio format conversions run 100% locally on your device via client-side WebAssembly. No video files or user data are ever uploaded to remote servers.
03 · Zero-Logging
Zero-Storage Privacy Commitment
We do not store, host, or index user media. All requests interface directly with public CDN edges over encrypted HTTPS connections.
Device Playback & Compatibility Guide
iPhone & iPad (iOS)
Tap Download in Safari -> tap the Downloads arrow -> open file in Files app -> tap Share -> Save Video to Camera Roll.
Android Devices
Tap Download in Chrome or Firefox. The MP4 video or MP3 audio saves directly to your Downloads folder and Gallery.
Windows & macOS
Plays natively in VLC, PotPlayer, IINA, QuickTime, or Windows Media Player. Drag and drop ASS files to view danmaku comments.
Need step-by-step instructions with audio fix and Camera Roll saving?Read the complete iPhone, Android & PC Guide →
Fair Use & Personal Backup Notice
BilibiliDownloader.co is an open browser-based utility designed exclusively for personal study, research, education, and offline backup of publicly accessible media. We respect copyright and creator rights. BilibiliDownloader.co is an independent third-party tool and is not affiliated with Bilibili Inc.
Search Intent & Formats Knowledge Hub
Explore Bilibili Media Tools by Format & Query Intent
Jump directly to optimized stream muxers, audio converters, inpainting tools, or subtitle extractors built for high-speed offline workflow.
Video & MP4 Streams
1080p 60fps, 4K & 8K DASH streams
Audio & MP3 Extraction
320kbps MP3 and Hi-Res M4A audio
Watermark Removal
Inpaint corner logos & creator UIDs
Subtitles & Danmaku
Bilingual CC to SRT & ASS comments
Batch, Playlists & Covers
Multi-P series queue & 4K artwork
Got Questions?
Subtitles & Danmaku Downloader FAQs
Answers regarding subtitle formats, transcript copying, and media player setup.
Which subtitle formats are supported (SRT, JSON, TXT)?
You can export CC subtitles as standard UTF-8 SRT (for video players), JSON (for developer tools), or plain TXT (for reading, translating, or copying transcripts).
How do I display ASS Danmaku comments in media players?
Modern media players like PotPlayer, VLC, and IINA support ASS subtitle files. Simply name the ASS file with the same filename as your MP4 video or drag-and-drop it onto the player window.
Can I copy the video transcript text directly?
Yes! Click "Copy text" to immediately copy the entire time-coded transcript or plain dialogue to your clipboard for note-taking and translation.
What is the difference between CC captions and Danmaku comments?
CC subtitles are creator-uploaded dialogue transcripts. Danmaku comments are user-submitted floating bullet comments that fly across the video screen.