these are various simple tools i might have needed for one thing or another, they aim to be lightweight, compatible with older browsers, and free of bullshit, cookie popups and ads like most web tools.

most of this was vibecoded with chatgpt or claude so its probably pretty shit code. but you hopefully wont use this anywhere near critical ops so its probably fine

everything in this folder should be considered public domain

[ipv4 subnet mask converter](ipv4-subnet-mask-converter/index.html) - converts ipv4 subnet masks between binary, decimal, and cidr notation
[linux octal permission visualiser](linux-octal-permissions.html) - visualises linux numeric and symbolic permissions