Traceability QR generator (offline, no personal data) | Lot QR code
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Traceability QR generator (offline, no personal data)

Create traceability QR codes and lot QR codes in one screen: input → generate → verify.

QR payloads are readable by anyone. Do not put confidential or personal information inside.

Offline No upload No personal data Generate → verify Lot QR
This tool runs entirely in the browser and never sends your input to a server.
QR payloads are readable by anyone. Do not include confidential information.
Offline-ready (bundled library) No personal data Generate and verify in one screen

Experience concept

Make it in 3 minutes, verify it on the spot.

Clear flow

Input → QR generation → scan test with real-time updates.

Offline-first

Always show ‘no network, no upload’ in a visible spot.

Safety by design

Keep the ‘no personal data’ guide near the input area.

Reusable

Templates and local history make it easy to reuse.

Layout

Desktop (2 columns)

  • Left: inputs and options
  • Right: QR preview, capacity meter, download/copy (sticky)
  • Bottom: verification → guide → FAQ

Mobile (1 column)

  • Input
  • QR preview
  • Download/copy
  • Verification
  • Guide/FAQ

Input (lot details, short mode)

Traceability QR generator built for lot QR codes. Keep only necessary fields.

Template

Fill with a sample to avoid blank input
Input mode
Required: lot ID
  • Lot ID: e.g. 2026-0205-A12
Required field
Suggested fields

Options

Dictionary ID: fishery-v1
Before / after preview
Before
After
Expand for human-readable
Short keys (fixed dictionary)
KeyShortMeaning
version v Format version
lot_id l Lot ID
species s Species
origin o Origin
catch_date cd Catch date
landing_date ld Landing date
process p Process
plant pl Plant code
cert c Certification
note n Note
hash h Hash
Points
  • Dictionary is fixed and public. Compression must keep meaning intact.
  • Always include dict ID and format version.
  • Helps future decoding and audit.
This is not a cryptographic signature. It helps detect changes but does not prevent tampering.
Tight ・ Wide
Reducing margin lowers scan reliability.

Output (QR image, payload text)

Real-time generation. Review and copy payload text as-is.

QR preview

Capacity meter

OK: likely readable
Most scan failures come from too much data.
Suggestions
  • Turn on short mode
  • Keep notes short
  • Lower error correction (H→Q→M→L)
  • Increase print size and margin

Payload text

Shows the exact contents embedded in the QR
View
QR will appear after input

Download

History (local)

No history yet

Verification (scan test)

Compare the generated payload with the scanned result.

Scan with camera
Available on supported browsers only. Use paste if unavailable.
Camera scanning is not supported in this browser.
Result: Pending
Hash check: Hash not checked

Do not include (personal/confidential info)

QR payloads are readable by anyone. Do not include confidential or personal data.

Not allowed

  • Names, phone numbers, emails, addresses, social handles
  • Precise location data that identifies private homes
  • Partner-only data (pricing, contract numbers)
  • Passwords, API keys, internal URLs without auth

Safer alternatives

  • Names → worker ID (anonymous internal code)
  • Contact info → public help page URL
  • Address → port code / region code / prefecture

FAQ (traceability QR generator / lot QR code)

The QR won't scan
Likely too much data, high error correction, or small print size. Enable short mode, shorten notes, lower error correction, and print larger. If the meter shows danger, reduce payload first.
I want a URL QR
Turn on URL mode. Because URLs add length, use short mode if you see warnings.
Can I add signatures?
This tool can add a simple hash (tamper detection reference). It is not a cryptographic signature and does not prevent someone from regenerating the QR.
Is any data uploaded?
No. Everything runs in your browser. If you enable history, it is saved locally on this device only.

Notes

  • QR payloads are readable by anyone. Do not include confidential information.
  • This tool supports traceability workflows but does not guarantee legal or standards compliance.
  • Hashes are for change detection reference, not authenticity guarantees.

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