OOONA Tools offers professional online tools for subtitling and captioning, accessible from any computer at any time. The platform provides a simple and intuitive web interface for creating and editing captions and subtitles in any language. Features include frame-accurate text timing with an advanced timeline, video grid for precise caption positioning, audio waveform, and scene-change detection for accurate subtitle spotting. It supports import and export in various caption and subtitle formats, including TTML/DFXP, VTT, SCC, CAP, EBU-STL, SRT, IMSC1, PAC, 890, and more. Additionally, it supports generating image-based subtitles for DVD/Blu-ray/DCP authoring. Powerful Pro apps allow users to run automated QA scripts to check and fix files, as well as customize hotkeys and project settings.