Offline-ready QES QR Suite

Encode, print, and recover signed PDFs with confidence.

Generate QR print packs, manage every sizing parameter, and reconstruct byte-exact PDFs directly in the browser. Built for iOS, Android, and desktop.

SHA-256 verification 20 QRs per A4 page On-device decoding

System status

Checking...

Active profile

Default

Grid

4 × 5

ECC / Max version

Q / 30

Fragment bytes

900

API endpoint: /api

Encode a signed PDF

Upload a QES-signed PDF and generate a QR print pack zip.

Drop PDF here or click to browse Max recommended 250 KB for mobile performance.

File size

Estimated frames

Estimated pages

Payload estimate

Idle

Waiting for file.

Encoder settings snapshot

These values come from Management. Edit them there to apply.

Grid: 4 × 5
ECC / Max QR version: Q / 30
Redundancy: 30%
Fragment bytes: 900
QR size / margin: 45 mm / 10 mm

Import settings JSON

Awaiting file.

Tip: keep QR versions ≤ 30 for reliable phone scans at 45–50 mm print size.

Decode page photos

Upload page photos, a scanned PDF, or use the live camera to reconstruct the PDF.

Drop page photos here JPG/HEIC recommended. Use document scan mode.

Decode scanned PDF

If you scanned the print pack into a PDF, upload it here.

Drop scanned PDF Multi-page PDF supported.

Waiting for PDF.

PDF engine: checking...

Live camera scan

Use your phone camera to scan QR frames directly (HTTPS or localhost required).

Camera idle. Scan captured

Pages loaded

Frames found

Duplicates

Errors

Waiting for photos.

Decode log will appear here.

Quick guide: 1) pick a source (photos, PDF, or camera). 2) Ensure grid = 4×5. 3) Start decode. 4) When SHA-256 verifies, download the PDF.

Verification

SHA-256 is computed on-device and compared to the manifest hash.

SHA-256 status

Not verified

Output file

Unavailable

If decoding stalls, retake photos with sharper focus or reduce glare.

Management interface

Fine-tune every QR, print, and decoding parameter.

API base URL Frame format Grid columns Grid rows Error correction Max QR version Fragment bytes Redundancy (0.0 - 1.0) QR size (mm) Page margin (mm) Quiet zone modules Manifest overhead (bytes) PDF render scale Decode mode Cell padding (%)

Decode cropping ratios

Percentages of the page to trim before slicing into the grid.

Left trim (%) Right trim (%) Top trim (%) Bottom trim (%)

Live estimates

Update when you adjust settings or select a PDF.

Frames per page

Target redundancy

30%

Current PDF size

Estimated QR pages

Manage settings are saved locally in this browser and never uploaded.