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Apps / Concessio

Concessio

Understand file permissions

Ronnie Nissan ✓ Verified

io.github.ronniedroid.concessio
View on Flathub ↗

Concessio helps you understand and convert between unix permissions representations

  • Convert between symbolic and numeric representations of UNIX file permissions
  • Use toggle buttons to update the symbolic and numeric fields
  • Open a file to read it's permissions and convert them
  • Calculate umask values and see the resulting permissions for new files and directories
  • Open the help dialog to read and understand the UNIX permissions system
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Screenshots

Application main page, converting between numeric and symbolic permission
Application main page, converting between numeric and symbolic permission
Applications main page, updating a file's permissions
Applications main page, updating a file's permissions
Application umask page, calculating the umask value for a base permission
Application umask page, calculating the umask value for a base permission
Application help page, explaining unix permissions
Application help page, explaining unix permissions

Observed history

App ChangeVersionWhen ↑
updatedv1.0.03 Oct 2026

Upstream releases

Release notes supplied by the developer. These dates are not Flathub package publication times.

v1.0.03 Oct 2026

Redesigned the file opening workflow

Added drag and drop support for opening files

Added support for changing file permissions, with the ability to undo changes

Improved the umask calculator to calculate from umask, file, or directory permissions

Improved accessibility throughout the app

Improved input validation and editing behavior

Updated translations

v0.3.04 Mar 2026

Added umask page

Added umask explanation to the help page

Make copy buttons accessible by tabbing

v0.2.112 Jan 2026

Make the app accessible by orca

v0.2.011 Jan 2026
  • Updated to gnome 49 runtime
  • Switched to blueprint for UI definition
  • Switched to new libadwiata shortcuts dialog