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Gaupol
What it is
Gaupol is a free subtitle editor for creating and translating text-based subtitles, timing them to video and correcting common errors. It supports multiple subtitle file formats, with SRT and VTT export listed. A built-in video player is available, and Gaupol can also launch an external player. Its integrated player uses GStreamer; additional GStreamer plugins are recommended for broader container and codec support. The maker offers a Flatpak release and source code, and says Gaupol is packaged for most popular Linux distributions. The current listed availability is Linux. Windows installers are no longer built; the latest Windows version is 1.3.1, and its built-in video player is disabled. The source installation guide lists libspelling as an optional spell-check dependency and charset-normalizer as an optional dependency for automatic character-encoding detection. Gaupol includes aeidon, a separately installable Python package for reading, writing and manipulating text-based subtitle files. It is Free Software under the GNU General Public License. Documentation, discussions and an issue tracker are available for help and issue reporting.
For and against
For
- Free Software under the GNU General Public License
- Exports SRT and VTT
- Includes a built-in video player
- Linux installation options include Flatpak and source
Against
- Windows installers are no longer built
- Latest Windows version is 1.3.1
- Windows built-in video player is disabled
- Broader codec support may require GStreamer plugins
The verdict
Gaupol offers subtitle editing and translation with video playback and common export formats at no cost. Linux is its listed current availability; Windows users should note the older version and disabled built-in player.
Who it suits
Gaupol suits people creating, translating or correcting text-based subtitles, particularly Linux users. It may also fit subtitle workflows that use SRT or VTT export and video playback.
Plans and prices
Gaupol
Free Software under the GNU General Public License (GPL) · Linux
Read 3 Oct 2026 · otsaloma.io
On the record
- Availability
- The maker lists Gaupol as available for Linux.otsaloma.io · read 3 Oct 2026
- Encoding
- The source installation guide lists charset-normalizer as an optional dependency for character encoding auto-detection.github.com · read 3 Oct 2026
- Formats
- Gaupol supports multiple subtitle file formats.github.com · read 3 Oct 2026
- Installation
- The maker offers a Flatpak release and source code, and says Gaupol is packaged for most popular Linux distributions.github.com · read 3 Oct 2026
- Integrations
- Gaupol uses GStreamer for its integrated video player and recommends additional GStreamer plugins for broader container and codec support.github.com · read 3 Oct 2026
- License
- Gaupol is released as Free Software under the GNU General Public License (GPL).otsaloma.io · read 3 Oct 2026
- Purpose
- Gaupol edits text-based subtitle files for creating and translating subtitles, timing them to video, and correcting common errors.otsaloma.io · read 3 Oct 2026
- Spell-check
- The source installation guide lists libspelling as an optional dependency for spell-check.github.com · read 3 Oct 2026
- SRT export
- Yesotsaloma.io · read 22 Sep 2026
- Subtitle library
- Gaupol includes aeidon, a separately installable Python package for reading, writing, and manipulating text-based subtitle files.github.com · read 3 Oct 2026
- Support
- The project links to documentation, discussions, and an issue tracker for help and issue reporting.otsaloma.io · read 3 Oct 2026
- Subtitle translation
- Yesotsaloma.io · read 22 Sep 2026
- Video playback
- Gaupol includes a built-in video player and supports launching an external player.otsaloma.io · read 3 Oct 2026
- VTT export
- Yesotsaloma.io · read 22 Sep 2026
- Windows
- Windows installers are no longer built; the latest Windows version is 1.3.1, and its built-in video player is disabled.github.com · read 3 Oct 2026
