Everyday tools
Create a QR code, find the tempo of a song or check sunrise and sunset for a location. Cyclists can compare gearing, estimate chain length and convert tire pressure units. Each tool includes the measurements or settings needed to interpret the result. QR codes and tempo calculations run locally; the map loads online map tiles.
QR code generator
Create QR codes for text, links, Wi-Fi and contact actions. Adjust colors and download PNG or SVG.
BPM tapper
Tap along with a song to measure beats per minute. Compare half-time and double-time tempos.
Sunrise and sunset map
Choose a location and date to calculate sunrise, sunset, twilight and day length on a world map.
Tire pressure converter
Convert tire pressure between PSI, bar and kPa. See all three units together.
BMX gear calculator
Compare chainring and sprocket combinations, gear inches, rollout and speed at a given cadence.
Bicycle chain length calculator
Estimate chain length from chainstay length and chainring sizes. See the length in inches and half-inch links.
Date, age and working days
Count calendar or working days, calculate age, and add days or months using your weekend and holiday rules.
Unit converter
Convert length, area, volume, mass, temperature, speed, pressure and data size with explicit unit definitions.
Time zone meeting planner
Compare full local dates and times across zones and find slots that fit the working hours you enter.
QR code reader
Decode a QR code from a local image. Inspect text, website links, Wi-Fi details or contact fields before choosing a copy or open action.
