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za3k/qr-backup

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Paper backup of files using QR codes

4 mentions on Hacker News by 3 people: 0 stories, 4 comments · first 2024-02-19 · latest 2026-02-18

Mentions per year 4 mentions · busiest year 2024 (2)
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  1. …2D, naïve 3D version is to just use these as a heightmap: - https://github.com/cyphar/paperback - https://github.com/za3k/qr-backup/ - https://github.com/colindean/optar - https://github.com/Sjlver/psst -…
    comment by Intralexical · 2026-02-18 · in Ask HN: Are there examples of 3D printing data onto physical surfaces?
  2. …are superior in one or another way, but all are far more expensive. It's probably worth mentioning https://github.com/za3k/qr-backup/ which is tested in practice rather than merely theoretical. It doesn't achieve very high density, though.…
    comment by kragen · 2025-06-03 · in How to Store Data on Paper?
  3. …print more than 5 KB per page using QR codes on paper. How many pages do you want to use? See https://github.com/za3k/qr-backup/blob/master/docs/FAQ.md
    comment by ahazred8ta · 2024-03-08 · in Ask HN: QR Codes Unsuitable for Storing Gigabytes and Beyond in Graphic Format?
  4. you will probably want to use https://github.com/za3k/qr-backup with safe settings it gets about 3 kilobytes per page; at 130 kilobytes per page read success rates are nonzero
    comment by kragen · 2024-02-19 · in Programming book authors: put all the code in the book