UD5 Toolkit
Multi‑User Whiteboard (Local) - Online Shared Drawing
Open the same page in two tabs and draw together in real time using BroadcastChannel API. Share ideas without a server.
Tag: Audio & Text Sync Tool
3+ toolsOnline SRT Subtitle Shifter - Adjust Timing & Sync
Load an SRT file and shift all timestamps forward or backward by milliseconds or seconds. Fix out-of-sync subtitles instantly. Download corrected file.
Karaoke Text Sync Tool - Online LRC Lyric Generator
Paste lyrics and tap while the song plays to embed timestamps. Export as .lrc file for music players. All in browser.