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QR-ZIPPER

[ encode | decode | transfer | secure ]

★ FULLY OFFLINE CAPABLE - NO INTERNET REQUIRED ★

Encode

Decode

P2P Transfer

Info

Create QR Code

Enter text, paste content, or upload a file to convert to QR code. Add optional password for security.

Drag & drop a text file here or

Text to Encode:

Password (Optional):

Data Capacity

0 / 2953 bytes (0%)

Scan QR Code

Upload an image or use your camera to scan a QR code. Enter the password if required.

Drag & drop a QR code image here or

Password (if required):

Decoded Data:

P2P File Transfer via QR Codes

Transfer files between devices using QR codes. One device displays codes (SEND) while the other scans them (RECEIVE).

Transfer Status

Ready to send

Drag & drop a file here (text or .zip) or

Text to Transfer:

Password (Optional):

Display Interval (seconds): 3s

Chunk Size: 1500 bytes

Tiny (More QR codes, easier to scan) Large (Fewer QR codes, harder to scan)

Smaller chunks are more reliable but create more QR codes. Very small chunks (below 300 bytes) may create many QR codes.

Camera Settings

Position your camera to capture the QR codes from the sending device. Data will appear as it's received.

Reception Status

Ready to receive

Password (if required):

Received Data:

Reception Log:

About QR Code Zipper & Unzipper

This tool allows you to encode data into QR codes and decode them back. Additional features include password protection, large file chunking, and peer-to-peer transfer capabilities.

QR Code Capacity

QR codes have different versions (sizes) with different data capacities:

Version 40 (largest): Up to 4,296 alphanumeric characters or 2,953 bytes of binary data
Version 25: Up to 1,556 alphanumeric characters or 1,069 bytes of binary data
Version 10: Up to 271 alphanumeric characters or 186 bytes of binary data
Version 1 (smallest): Up to 25 alphanumeric characters or 17 bytes of binary data

Security Features

This application includes several security features:

Password Protection: AES encryption for your data
MD5 Verification: Ensures data integrity during multi-part transfers
Local Processing: All operations happen in your browser, no data is sent to servers
Completely Offline: All libraries are included locally - no internet connection required

Chunking and P2P Features

For files larger than a single QR code can handle:

Data is automatically split into multiple chunks
Each chunk includes position information and an MD5 checksum
Use the P2P Transfer mode to transfer large files between devices

Tips for Best Results

For P2P transfers, ensure good lighting and a stable camera position
Adjust the display interval based on your camera scanning speed
Keep passwords simple but secure to avoid typing errors
When scanning, ensure the QR code is fully visible in the camera
For large files, use a slower display interval to ensure reliable scanning