CIDR / Subnet Calculator
Work out network, broadcast and host range from a CIDR.
Utilities
Timers, notepad, CIDR & handy everyday tools.
Battery Status Viewer
Live charge level and time remaining.
Browser Info Viewer
Inspect your browser, OS and environment.
Clipboard Inspector
Inspect what you just copied: type, size, counts.
Color Contrast Quick Check
Instant WCAG pass/fail for any text & background.
Geolocation Viewer
See your device coordinates and accuracy.
Habit Tracker
Track daily habits and watch your streaks.
IP to Binary Converter
Turn an IPv4 address into binary, decimal and hex.
IPv6 Address Expander
Expand and compress IPv6 addresses instantly.
Keyboard Event Tester
See key, code, keyCode and modifiers for any keypress.
Metronome
A clean, accurate online metronome.
Notepad (localStorage)
A private scratchpad saved in your browser.
On-screen Ruler
A calibrated ruler right on your screen.
Pomodoro Timer
Focus in 25-minute sprints with smart breaks.
QR Code Reader
Decode a QR image and read its content.
Random Decision Wheel
Let chance pick from your list of options.
Screen Resolution Detector
See your screen size, DPR and aspect ratio.
Stopwatch Countdown
A precise stopwatch and countdown timer with laps.
Subnet Calculator
Network, broadcast, host range and mask details.
Tally Counter
A simple click counter with adjustable step.
Text Snippet Manager
Save, search and reuse text snippets in your browser.
To-Do List
A quick, private checklist in your browser.
Unit Price Comparison
Find the best value by price per unit.
Whiteboard
A quick freehand sketch pad in your browser.
About Utilities
The everyday drawer of the garage: a CIDR/subnet calculator for network planning, browser and battery info viewers, a clipboard inspector, timers and counters, and other small utilities that do not fit a neat category but earn their keep. Like every tool on this site, they run entirely in your browser — the subnet you calculate or the clipboard contents you inspect never leave your device. Each utility is a single fast page with no setup: open it, use it, close it.