Free online utilities

Powerful tools.
Zero friction.

Create QR codes, manage PDFs, and run calculations instantly. Free forever, private by design, and ready on any device.

  • No Signup
  • Free to Use
  • Privacy Friendly
TetraKits free online tools on laptop and phone
QR code generator, WiFi, and contact card tools

QR Code Tools

Generate and scan QR codes for links, WiFi, contacts, and more. Create high-resolution codes in seconds with no account required.

Merge, split, and compress PDF files online

PDF Tools

Merge, split, compress, and edit PDF files right in your browser. Fast, private, and built for everyday document tasks.

Financial calculators for investments and loans

Financial Calculators

Plan investments, loans, and everyday math with clarity. Simple tools that give you answers without spreadsheets or signup.