Subtitle Editor & Converter

SubStudio is a subtitle editor and converter for Android. Use it to correct dialogue, adjust caption timing and save subtitle files in the format you need.

Open a video from your phone to check captions against the scene. You can hide the video panel for more editing space and show it again when you need a preview.

With SubStudio, you can:
- Edit subtitle text and start and end times.
- Add, delete and reorder captions.
- Jump to a caption's start in your video.
- Convert SRT to VTT, ASS and other subtitle formats.
- Preview ASS and SSA fonts, colors, outlines and positioning.
- Choose a frame rate for supported frame-based formats.

Open an existing subtitle file or create captions from scratch. Make your changes, choose an output format and export. Timing adjustments are manual. SubStudio does not generate subtitles automatically or burn them into a video.

Supported formats include SRT, WebVTT, ASS, SSA, YouTube SBV, MicroDVD SUB, SAMI SMI, TTML/DFXP, LRC, MPL2, TMPlayer TMP and Spruce STL. These are text subtitle formats; image-based VobSub and binary EBU STL are not supported. Styling and timing precision may change when converting between formats.

No SubStudio account is needed. Video and subtitle processing happens on your device.

Edits are not autosaved, so export your work before closing the app.

Recent changes:
fixed bugs