chmod Calculator

Convert Unix file permissions between numeric and symbolic notation locally in your browser, with a linked checkbox matrix and ready-to-copy chmod command.

chmod Calculator

Calculate Unix file permissions online with numeric `755`, symbolic `rwxr-xr-x`, linked checkbox matrix editing, and a ready-to-copy `chmod` command.

How to use

  1. Enter numeric permissions such as `644`, `755`, or `600` to see the symbolic form instantly.
  2. Or type symbolic permissions like `rwxr-xr-x` to convert them back into numeric mode.
  3. Adjust owner, group, and others permission bits with the read / write / execute checkbox matrix.
  4. Copy the generated `chmod` command for terminal use, scripts, deployment notes, or permission reviews.

Features

  • Bidirectional numeric permission ↔ symbolic permission conversion
  • Linked permission matrix with live `chmod` command generation
  • Includes common presets, permission summaries, and fully local calculation

Why use this?

  • Useful for Linux operations, backend deployment, shell scripting, Docker debugging, and server permission review
  • Faster than mentally recalculating `4 / 2 / 1`, especially when checking owner, group, and others combinations
  • Runs fully in the browser so you can calculate and copy results without jumping back and forth to a terminal

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