Developer QR codes

QR code generator

Web address
Version 2 · 33×33 · 20/26 bytes
Error correction
Higher levels survive more damage and make the code denser. M is the usual choice; use H only if the code will be printed small or partly covered.
Local · the data is in the code, not on a server
https://tooltiki.com
Advertisement
320 × 100

A QR code stores data directly in its pattern of black and white squares — there is no lookup and no server involved. The codes made here contain exactly what you type, so they work forever, cannot be redirected later, and record nothing when scanned. Error correction lets a code still read with up to 30% of it damaged.

How to make a QR code

1 Pick what the code should carry: a link, some text, Wi-Fi details, a phone number or a contact card.
2 Fill in the fields. The code redraws as you type.
3 Download it as PNG for screens or SVG for print, where it stays sharp at any size.

Free QR services usually give you a short redirect link rather than your own data, which lets them count scans — and lets the code stop working when they change their pricing. A code with the destination inside it is larger and denser, and that is the trade: a longer link makes a busier code. Shorten the URL before generating if density matters, and check that the shortener is one you trust to still exist in five years.

Questions

No. The data is in the pattern, so there is nothing to expire and nobody to keep paying.

ISO/IEC 18004 — QR Code bar code symbology specification
Advertisement
300 × 250
Was this tool any good?
INTERNAL SIGNAL ONLY · WE USE IT TO FIND TOOLS WORTH REBUILDING