Observed arrival · 2026-10-22
ChmodCalc, for translating file permissions
A browser-based calculator that converts Unix file permissions between checkboxes, octal numbers, and symbolic strings, then builds a command to copy.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- People setting Unix file and directory permissions
- Worth noticing
- It distinguishes file permissions from directory permissions and explains why directory execute access controls entry and access to files.
Field notes
The page explains the permission bits and shows how each octal digit combines read (4), write (2), and execute (1). Its examples include special-bit modes such as 4755 and 1777, plus the effect of umask 022 on newly created files and directories. A copied command is meant to be run outside the page; the site says its calculations do not touch the user's system.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
◎NicheUnusually specific use
One card from the complete issue