Quadratic Equation Solver (ax² + bx + c = 0)
About Barcode Decoder
The Universal 1D / 2D Barcode Decoder & Symbology Analyzer parses barcode images and raw binary bar/space patterns, decoding UPC-A, UPC-E, EAN-13, EAN-8, Code 128, Code 39, Code 93, ITF-14, Codabar, and PDF417 with checksum verification.
How to Use Barcode Decoder
Step 1
Upload a barcode image or paste from your clipboard.
Step 2
Review decoded numeric/alphanumeric value and symbology type.
Step 3
Inspect checksum validation badge and country of origin.
Step 4
Click "Copy Barcode Value".
Practical Use Cases for Barcode Decoder
Verifying Retail & Logistics Barcode Checksums
Verify Modulo-10 checksum digits on retail EAN-13 and UPC-A barcodes before sending product packaging to commercial offset printing.
Extracting GS1-128 Application Identifiers (AI) from Shipping Labels
Parse SSCC-18 pallet numbers, batch lot codes, and expiration dates encoded in GS1-128 logistics barcodes.
Input & Output Examples
Decoding Retail EAN-13 Barcode
Image: `product_barcode.png`
Symbology: `EAN-13` | Value: `4006381333931` | Checksum: `Valid (1)` | Country Prefix: `400-440 (Germany)`
Key Features & Performance
- ✓Symbologies: EAN-13, EAN-8, UPC-A, UPC-E, Code 128 (Sets A/B/C), Code 39, Code 93, ITF-14, Codabar, PDF417.
- ✓Extracts: Barcode Type, Decoded Digits/Text, Checksum Validation Status, GS1 AI Breakdown.
- ✓Input: Upload Image, Paste from Clipboard (`Ctrl+V`), or Input Raw Binary Bar Sequence.
- ✓100% Client-Side ZXing Barcode Decoder.
- ✓1-Click Copy decoded barcode data.
Key Terminology & Definitions
Modulo-10 Checksum
A weighted mathematical algorithm used in UPC and EAN barcodes to detect single-digit transcription errors.
GS1 Application Identifier (AI)
Two-to-four digit prefix numbers (e.g. `(01)` for GTIN, `(10)` for Batch Number) standardizing supply chain data.