Convert between numeric (755) and symbolic (u=rwx,g=rx,o=rx) chmod permission formats. See detailed breakdown for owner, group, and others. Code never leaves your device — formatting and validation run locally in your browser.
Content reviewed October 2026 · About Toolzum
Convert between hexadecimal bytes and ASCII text. Supports custom delimiters and real-time bidirectional conversion. Code never leaves your device — formatting and validation run locally in your browser.
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Numeric uses octal digits (e.g., 755), while symbolic uses letters (e.g., u=rwx,g=rx,o=rx). Both represent the same permissions.
Read (4), write (2), and execute (1). Add them together: 4+2+1=7 (full), 4+0+1=5 (read+execute), etc.
Yes. Enter symbolic notation like u=rwx,g=rx,o=r and get the numeric equivalent (754).
The permission values are the same for files and directories, but the execute bit means different things (traverse for directories, execute for files).
Type 3 octal digits (each 0-7, validated by /^[0-7]{3}$/) or symbolic form like u=rwx,g=rx,o=rx. The 8 quick-pick buttons are 644, 755, 777, 600, 700, 444, 400, 000, and each digit decodes as r=4, w=2, x=1.
Yes. The calculator works entirely offline after the initial page load.
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