chmod Calculator — Free, No Upload, Browser-Based

Convert Unix file permissions instantly between numeric (octal), symbolic, and human-readable formats — all inside your browser with no upload and no server involved. Toggle individual read, write, and execute bits visually, type a numeric code like 755, or paste a symbolic string like rwxr-xr-x and every representation updates in real time. Copy the chmod command directly, or use common presets for typical file and directory setups.

このツールの使い方

1. Choose your preferred input mode — Visual (toggle checkboxes), Numeric (type an octal code like 755), or Symbolic (type a string like rwxr-xr-x).
2. Set the permissions for Owner, Group, and Other using the selected input mode, or pick a common preset such as 644, 755, or 600.
3. Copy the numeric code, symbolic notation, or the ready-to-use chmod command from the result panel.