All tools

Generate cryptographically random version 4 UUIDs in bulk for databases, APIs and test data.

Create strong random passwords with letters, numbers and symbols, generated locally and never sent anywhere.

Generate random numbers between any minimum and maximum, with optional uniqueness for draws and lotteries.

Paste your options one per line and let the generator pick a fair random winner — perfect for giveaways.

Generate random letters of the alphabet for games, drills, naming ideas and classroom activities.

Generate random dates inside a range for test data, planning exercises and sample datasets.

Draw random months of the year — handy for planning, quizzes and randomised schedules.

Generate random IPv4 or IPv6 addresses for testing firewalls, logs, mock data and tutorials.

Dial in offset, blur, spread, colour and opacity to generate ready-to-copy CSS for box shadows, inner shadows and frosted glassmorphism cards — no design tool required.

Enter a HEX colour to generate monochromatic, complementary, analogous and triadic palettes, then check the WCAG contrast ratio against black and white so your text always passes AA and AAA accessibility.

Enter your original width and height, then set a new width or height — the calculator works out the matching dimension, the simplified ratio (16:9, 4:3, 9:16) and common social media sizes.

Create a QR code for any link, text, Wi-Fi password or contact detail, then customise the colours, quiet zone, dot shape and error correction. Copy the SVG code or save it for print at any size.

Pick a date, a time and a home city, and see the same moment in New York, London, Berlin, Dubai, India, Singapore, Tokyo, Sydney and more — so remote teams never book a call at 3am again.

Check any password's entropy in bits and how long an offline brute-force attack would need to crack it, plus concrete tips to make it stronger. Nothing leaves your browser — the analysis is 100% local.