Tools starting with Q

Create QR codes for links, WiFi networks, contacts, email, SMS or plain text.

Read a QR code or barcode from a photo, a screenshot or the camera, and see what it contains before acting on it.

Solve ax² + bx + c = 0, with the discriminant and vertex shown.

Turn a list of names and values into a correctly encoded query string.

Send a priced quote with itemised work, tax and an expiry date, as a PDF.