PostgreSQL vs MySQL Performance: Real Benchmarks Compared
Last updated: 7 November 2026. See the update log at the end."Which is faster, PostgreSQL or...
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Make a QR code for a link, any text, your Wi-Fi network, a WhatsApp chat or a contact card. The codes are static: they never expire and nobody tracks the scans.
Spaces, dashes and the + are ignored.
Typed in for the person who scans; they can change it before sending.
Needs a name or a company. Fewer fields make a simpler code that scans more easily from business cards.
Choose Link / text, Wi-Fi, WhatsApp or Contact (vCard), then fill in the details.
Adjust the size, colours and error correction if you like; the code updates as you type.
Download it as PNG (for screens and documents) or SVG (for print at any size).
No. The content is stored in the code itself, so it works forever and no server is involved.
M (15%) suits most uses. Choose Q or H if the code will be printed small, on a curved surface, or with a logo on top.
Scanners need strong contrast: use a dark code on a light background, never the reverse.
It holds a wa.me link with your number. Scanning it opens a chat with you in WhatsApp, with your message already typed in if you added one. Enter the number with its country code, for example 94 77 123 4567 for Sri Lanka.
It holds your contact details. When someone scans it with an iPhone or Android camera, the phone offers to save you as a new contact: name, company, phone numbers, email, website and address.
Yes. Use the Contact (vCard) type, keep only the fields you need, download the SVG for sharp printing, and print it at least 2 cm wide.
Last updated: 7 November 2026. See the update log at the end."Which is faster, PostgreSQL or...
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