For questions about encoding, scanning, or decoding a QR code, which is a two-dimensional barcode, a machine-readable optical label that contains information about the item to which it is attached.
Questions tagged [qr-code]
4 questions
9
votes
6 answers
Generating QR code of very big file?
I want to generate a QR code of my 4096-bit armored GPG private key. The key is so big, the program qrencode seems to fail because of its size.
$ gpg --export-secret-keys --armor > ~/private.key
$ ./qrencode -o test.png <…
toogley
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3
votes
1 answer
Generate a QR-code to log into Wireless (wifi) with WPA encryption
I installed a command-line QR-code generator:
apt install qrencode
I used the following format, so the QR scanner knows what to do with the content:
WIFI:T:WPA;S:;P:;;
generating the QR image…
nath
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1
vote
0 answers
Decode and identically re-encode QR code
It happens to me regularly that I get a low quality raster image of a QR code and I need it in better quality.
This works in principle:
zbarimg --quiet --raw qr-bad.png | qrencode -t SVG -o qr-good.svg
But sometimes it's important to keep the QR…
Nobody
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1
vote
3 answers
How can I generate QR Codes with subtitles?
I need to generate several thousand qr codes of simple IDs (1234, 1235, 1236, ...) and want to be able to also make them human readable. qrencode is a really cool tool to generate qr-codes, BUT no way to add a subtitle there.
Any ideas?
Frischling
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