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Using Hash Generator for printed materials

How to size and format a identifier so it actually scans / works when printed. Browser-based, free, no signup, runs entirely on your device.

Tool:Hash Generator

Generating a identifier sounds like it should require an app — and historically it did. Hash Generator runs the same thing in your browser tab, with one tap and no signup.

Run it in your browser: Hash Generator — No upload, no signup, no daily limit.

Hash Generator for printed materials

Print is where identifier generation gets specific. The identifier needs to scan reliably from a few inches away, under uncontrolled lighting, possibly slightly crumpled or smudged.

Sizing rules

  • Minimum size for scanning at arm's length: 2 cm × 2 cm (about 0.8 inches).
  • For posters meant to be scanned from across a room: at least 10 cm × 10 cm, scaled up linearly with distance.
  • Always include the quiet zone — the empty border. Without it, scanners struggle.

Print-specific tips

Generate at the largest size you'll need, then scale down in the layout — never up. PNG with high error-correction is the safest format for press output. Test with a real phone before you commit to the print run.

Run it in your browser

Hash Generator →

Browser-only. Nothing is sent to a server.

Frequently asked questions

Will my identifier work after Hash Generator shuts down?

Yes — once generated, a identifier is a standalone artefact. It doesn't depend on Hash Generator continuing to exist.

What format does Hash Generator output?

Hash Generator offers PNG (for print), SVG (for web), and plain text (for embedding) where applicable.

Does Hash Generator store my generated identifier?

No. Hash Generator generates everything in your browser; nothing is uploaded, saved, or sent.

Can I generate identifiers in bulk?

Yes — drop a list of inputs and Hash Generator runs them all in sequence, packaged into a ZIP for download.

Related guides

Ready to try it?

Launch the tool: Hash Generator. Runs entirely on your device using open web standards.

Last reviewed May 2026. File-size limits, portal requirements, and software defaults change over time — always verify with the destination platform before uploading time-sensitive documents. References to third-party services and products are for descriptive purposes only and do not imply any partnership or endorsement.