Barcode Generator

Generate barcodes in various formats for retail, inventory, and identification. Supports 1D barcodes (Code128, EAN, UPC) and batch generation from CSV.

Quick Start from scripts.barcode_gen import BarcodeGenerator

Generate barcode

gen = BarcodeGenerator() gen.generate("123456789012", format="ean13", output="barcode.png")

Code128 (variable length)

gen.generate("ABC-12345", format="code128", output="product.png")

Batch from CSV

gen.batch_generate("products.csv", code_column="sku", output_dir="./barcodes")

Features Multiple Formats: Code128, EAN13, EAN8, UPC-A, Code39, ITF, ISBN Output Formats: PNG, SVG, PDF Customization: Size, colors, text display Batch Generation: From CSV files Validation: Check digit calculation and verification API Reference Basic Generation gen = BarcodeGenerator()

Generate with auto-format detection

gen.generate("123456789012", output="barcode.png")

Specific format

gen.generate("12345678", format="ean8", output="barcode.png")

Customization gen.generate( "ABC123", format="code128", output="barcode.png", width=300, # Image width height=150, # Image height show_text=True, # Show code below barcode font_size=12, # Text size foreground="black", # Bar color background="white" # Background color )

Batch Generation

From CSV

gen.batch_generate( "products.csv", code_column="sku", format="code128", output_dir="./barcodes", filename_column="product_name" # Use product name as filename )

From list

codes = ["ABC001", "ABC002", "ABC003"] gen.batch_generate_list(codes, format="code128", output_dir="./barcodes")

Validation

Validate barcode format

is_valid = gen.validate("5901234123457", format="ean13")

Calculate check digit

check = gen.calculate_check_digit("590123412345", format="ean13")

Returns: 7

Generate with auto check digit

gen.generate("590123412345", format="ean13", auto_check_digit=True)

Output Formats

PNG (default)

gen.generate("123", format="code128", output="barcode.png")

SVG (vector)

gen.generate("123", format="code128", output="barcode.svg")

PDF

gen.generate("123", format="code128", output="barcode.pdf")

CLI Usage

Generate single barcode

python barcode_gen.py --code "123456789012" --format ean13 --output barcode.png

Code128

python barcode_gen.py --code "ABC-12345" --format code128 --output product.png

Custom size

python barcode_gen.py --code "12345" --format code39 --width 400 --height 200

Batch from CSV

python barcode_gen.py --batch products.csv --column sku --format code128 --output-dir ./barcodes

Validate

python barcode_gen.py --validate "5901234123457" --format ean13

CLI Arguments Argument Description Default --code Code to encode - --format Barcode format code128 --output Output file - --width Image width 300 --height Image height 150 --no-text Hide code text False --batch CSV file for batch - --column Code column in CSV code --output-dir Output directory . --validate Validate code - Supported Formats Format Length Characters Use Case code128 Variable ASCII General purpose ean13 13 Digits Retail products ean8 8 Digits Small products upca 12 Digits US retail code39 Variable A-Z, 0-9, symbols Industrial itf Even Digits Shipping isbn13 13 Digits Books isbn10 10 Digits + X Books (legacy) Examples Product Label gen = BarcodeGenerator()

gen.generate( "5901234123457", format="ean13", output="product_barcode.png", width=250, height=100, show_text=True )

Inventory Tags gen = BarcodeGenerator()

inventory = [ {"sku": "INV-001", "name": "Widget A"}, {"sku": "INV-002", "name": "Widget B"}, {"sku": "INV-003", "name": "Widget C"} ]

for item in inventory: gen.generate( item["sku"], format="code128", output=f"./tags/{item['name']}.png" )

Book ISBN gen = BarcodeGenerator()

ISBN-13 barcode

gen.generate( "9780134685991", format="isbn13", output="book_barcode.png" )

Batch Product Labels gen = BarcodeGenerator()

products.csv:

sku,product_name,price

123456789012,Widget A,9.99

234567890123,Widget B,14.99

gen.batch_generate( "products.csv", code_column="sku", format="ean13", output_dir="./product_labels", filename_column="product_name" )

Check Digit Calculation

The generator can automatically calculate and append check digits:

gen = BarcodeGenerator()

EAN-13: 12 digits + 1 check digit

gen.generate("590123412345", format="ean13", auto_check_digit=True)

Generates barcode for "5901234123457"

Manually calculate

check = gen.calculate_check_digit("590123412345", format="ean13") print(f"Check digit: {check}") # 7

Dependencies python-barcode>=0.15.0 Pillow>=10.0.0

Limitations Some formats have strict length requirements Characters must match format specifications PDF output may require additional fonts Very long codes may not scan well at small sizes