Editsub From $4/mo · Free plan 8.9 Visit 
Gaupol
otsaloma.io
What it is
Gaupol is free subtitle-editing software for creating and translating text-based subtitles, timing them to video, and correcting common errors. It supports multiple subtitle formats and lists SRT and VTT export. A built-in video player is available, with an option to launch an external player. Gaupol is Free Software under the GNU General Public License, with a free plan priced at free. Linux is the current availability listed by the maker, with Flatpak, source code, and packages for most popular distributions. Windows installers are no longer built; the latest Windows version is 1.3.1 and its built-in player is disabled. The integrated player uses GStreamer, and additional plugins are recommended for broader container and codec support. Optional source dependencies cover spell-checking and character-encoding detection. Gaupol includes aeidon, a separately installable Python package for subtitle-file manipulation. Documentation, discussions, and an issue tracker provide support channels.
Spec sheet
- Purpose
- Gaupol edits text-based subtitle files for creating and translating subtitles, timing them to video, and correcting common errors.Read 3 Oct 2026 · otsaloma.io
- Free plan
- YesRead 22 Sep 2026 · otsaloma.io
- Integrations
- Gaupol uses GStreamer for its integrated video player and recommends additional GStreamer plugins for broader container and codec support.Read 3 Oct 2026 · github.com
- Support
- The project links to documentation, discussions, and an issue tracker for help and issue reporting.Read 3 Oct 2026 · otsaloma.io
- License
- Gaupol is released as Free Software under the GNU General Public License (GPL).Read 3 Oct 2026 · otsaloma.io
- Availability
- The maker lists Gaupol as available for Linux.Read 3 Oct 2026 · otsaloma.io
- Encoding
- The source installation guide lists charset-normalizer as an optional dependency for character encoding auto-detection.Read 3 Oct 2026 · github.com
- Formats
- Gaupol supports multiple subtitle file formats.Read 3 Oct 2026 · github.com
- Installation
- The maker offers a Flatpak release and source code, and says Gaupol is packaged for most popular Linux distributions.Read 3 Oct 2026 · github.com
- Spell-check
- The source installation guide lists libspelling as an optional dependency for spell-check.Read 3 Oct 2026 · github.com
- SRT export
- YesRead 22 Sep 2026 · otsaloma.io
- Subtitle library
- Gaupol includes aeidon, a separately installable Python package for reading, writing, and manipulating text-based subtitle files.Read 3 Oct 2026 · github.com
- Subtitle translation
- YesRead 22 Sep 2026 · otsaloma.io
- Video playback
- Gaupol includes a built-in video player and supports launching an external player.Read 3 Oct 2026 · otsaloma.io
- VTT export
- YesRead 22 Sep 2026 · otsaloma.io
- Windows
- Windows installers are no longer built; the latest Windows version is 1.3.1, and its built-in video player is disabled.Read 3 Oct 2026 · github.com
Plans and prices
Gaupol Free Free Software under the GNU General Public License (GPL) · Linux Read 3 Oct 2026 · otsaloma.io
Strong points and limits
Strong points
- Creates and translates text subtitles
- SRT and VTT export
- Built-in and external player options
- Free GPL software
- Flatpak and source availability
Limits
- Windows installers are no longer built
- Latest Windows version is 1.3.1
- Built-in Windows player is disabled
- Broader playback may require GStreamer plugins
Who it suits
It suits subtitle creators and translators working with text-based files on Linux. Windows users can use the last listed version, but no newer Windows installers are built and its built-in player is disabled.
Verdict
Gaupol focuses on subtitle editing, timing, translation, and format handling with free GPL licensing. Linux has the clearest current installation path; Windows support is limited to the older listed release.
Where Specifiction places it
- Subtitle Software#14 of 317.9
- Subtitle tools#20 of 317.6
