A combo instrument made of buckets, pots, pot lids, cups and more
Batch UUID generation and UUID format validation
Test left/right channels, frequency response, hearing-threshold curve, phase and audio quality — full audio device check
Enter text, name, nickname or slogan and we'll generate an acrostic poem for you free online
One-click format your CSS code online
An online random maze generator that quickly creates varied maze patterns
Enter values to compute mean, standard deviation, relative deviation and more, with frequency bar and line charts
Convert between Punycode and strings; encode/decode Chinese domains
工具哇! 
