Sub Editor is a visual subtitle editor designed for accurate timing and keyboard-driven operation.
It presents video, subtitles and an audio waveform in a single interface, allowing subtitle blocks to be positioned and adjusted directly on the timeline.
This is free and open source software.
Key Features
- Displays audio peaks and subtitle blocks on a waveform timeline.
- Moves, resizes and snaps subtitle blocks with precision.
- Previews subtitles over the video while editing.
- Edits subtitle text directly within the list view.
- Splits text and duration proportionally at the cursor position.
- Detects CJK and Latin text and applies separate character limits.
- Provides pre-roll playback for hearing dialogue in context.
- Offers an audio-only mode for detailed timing work.
- Performs regular expression searches and replacements.
- Automatically saves work every 60 seconds and provides crash recovery.
- Restores the playhead position and timeline zoom level from project files.
- Supports drag-and-drop opening of video and audio files.
- Automatically loads a matching SRT file alongside the media.
- Exports subtitles in SRT and plain text formats.
- Runs on Linux, macOS and Windows.
Website: github.com/shfire616/Subtitle-Editor
Support:
Developer: shfire616
License: GNU General Public License v3.0

Sub Editor is written in Python. Learn Python with our recommended free books and free tutorials.
Related Software
| Subtitle Editors | |
|---|---|
| Subtitle Edit | Versatile and feature-laden editor for video subtitles |
| Gaupol | Editor for text-based subtitle files |
| Aegisub | Highly customizable tool for creating and modifying subtitles |
| AutoSubs | Subtitles made simple |
| Subtitle Composer | Editor that supports basic and advanced operations |
| Jubler | Author new subtitles - convert, transform, correct and refine |
| Gnome Subtitles | Video subtitling for the GNOME desktop |
| Tero Subtitler | Feature-rich subtitle creation, translation and validation tool |
| YTSubConverter | Create styled YouTube subtitles |
| Subtitle Forge | Desktop application for working with subtitles across the full workflow |
| Sub Editor | Visual, keyboard-driven subtitle editor with waveform timing |
| Subtitle Editor | GTK+3 tool to edit subtitles |
| Subtitld | Edit, transcribe and create subtitles |
| subedit | Command-line editor written in Bash |
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