Barcode Generator
Generate barcodes (EAN, UPC, Code128, and more) from text or numbers.
Barcode Input
Barcode Settings
Generated Barcode
Batch Generation
Barcode Scanner (Test Generated Codes)
Drop barcode image here or click to upload
Supports image files
Barcode Types Guide
Common Types:
- CODE 128: Most versatile, alphanumeric
- CODE 39: Simple, widely supported
- EAN-13: Products (13 digits)
- EAN-8: Small products (8 digits)
- UPC-A: North American products
Best Practices:
- Use high contrast colors (black on white)
- Maintain minimum size for scanning
- Test barcodes before printing
- Include human-readable text
- Consider scanning distance and equipment
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Learn more — open a section when you need details
The Barcode Generator creates industry-standard, scannable barcodes supporting multiple symbologies including CODE 128 (most flexible, supports alphanumeric), CODE 39 (alphanumeric with asterisk delimiters), EAN-13 and EAN-8 (European retail product codes), UPC-A (North American retail products), ITF-14 (shipping containers and logistics), MSI (inventory management), Pharmacode (pharmaceutical packaging), and Codabar (library systems). It provides extensive customization options including adjustable barcode width and height dimensions, configurable quiet zone margins for scanner compatibility, customizable bar and background colors for branding, human-readable text display with adjustable font sizes, and output format selection (PNG, JPEG). The tool includes real-time validation to ensure input data meets each symbology's specific requirements (character sets, length limits, checksum validation), batch processing capabilities for generating multiple barcodes simultaneously from line-separated input with ZIP file export, built-in barcode scanner testing using ZXing library to validate readability from uploaded images, and one-click copy, download, and print functionality. All barcode generation happens locally in your browser using JsBarcode library, ensuring complete privacy and no server uploads. Perfect for product labeling and retail SKU creation, inventory management and asset tracking, shipping labels and logistics barcodes, warehouse bin location codes, library cataloging and document management, pharmaceutical packaging compliance, prototype development and testing, and generating barcode samples for integration into design software or label printing systems.
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1
Enter the data you want to encode (text or numbers) in the input field and select the appropriate barcode type from the dropdown menu, ensuring your input data matches the symbology requirements (e.g., EAN-13 requires exactly 12 digits plus checksum, CODE 128 accepts alphanumeric characters).
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2
Adjust barcode customization settings including width and height dimensions to match your printing or display requirements, set quiet zone margins (recommended 10 units minimum) for scanner compatibility, and choose bar color and background color combinations that provide high contrast for reliable scanning.
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3
Configure human-readable text display options including font size adjustment and text alignment (center, left, right), and decide whether to show the encoded value below the barcode for manual entry fallback or hide it for cleaner visual appearance depending on your application requirements.
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4
Click the Generate button to create and preview your barcode in real-time, or the barcode generates automatically as you type (with debouncing), displaying the barcode image with validation status messages indicating if the input data is valid for the selected symbology type.
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5
Use the Copy button to copy the barcode image to clipboard for pasting into documents or design software, use Download to save as PNG or JPEG file with appropriate naming, or use Print for direct printing of the barcode without downloading a file first.
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For batch processing, paste multiple values (one per line) in the batch input area, click Generate All to create barcodes for all values simultaneously, review the batch results in the grid display, and download all barcodes as a ZIP archive file for convenient bulk processing and file management.
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Test barcode readability using the built-in Scanner feature by uploading an image file containing your generated barcode, allowing you to validate that the barcode scans correctly before printing or deploying in production environments, catching potential issues early.
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Save and load barcode templates using the template management features to preserve your preferred settings (colors, dimensions, symbology) for reuse across multiple barcode generation sessions, streamlining workflow when creating consistent barcode designs for recurring projects or branding requirements.
Retail product labeling and SKU management
Generate EAN-13 or UPC-A barcodes for retail product packaging, ensuring compliance with global retail standards, enabling point-of-sale scanning, inventory tracking, and product identification across retail supply chains with industry-standard symbologies required by major retailers and marketplaces.
Warehouse inventory and asset tracking systems
Create CODE 128 or CODE 39 barcodes for warehouse bin locations, inventory item IDs, asset tags, and internal tracking systems, supporting alphanumeric identifiers for complex naming schemes while maintaining scannable barcodes that integrate with warehouse management systems and inventory databases.
Shipping and logistics container labeling
Generate ITF-14 barcodes for shipping containers, cartons, and pallets in logistics operations, enabling automated sorting, package tracking, and shipping manifest generation with symbologies specifically designed for shipping labels and logistics applications requiring high-density numeric encoding.
Library cataloging and document management
Create Codabar barcodes for library book identifiers, document tracking numbers, and archival systems, supporting the numeric and special character formats commonly used in library management systems for reliable scanning and catalog integration in educational or institutional settings.
Pharmaceutical packaging and compliance
Generate Pharmacode barcodes for pharmaceutical packaging, medication identification, and regulatory compliance, ensuring proper medication tracking and safety in healthcare environments where pharmaceutical-specific barcode standards are required for inventory control and patient safety protocols.
Manufacturing and production line labeling
Create MSI barcodes for manufacturing parts, production lot tracking, work-in-progress identification, and quality control labels in manufacturing environments, supporting inventory management systems specifically designed for manufacturing workflows and production tracking.
Prototype development and design integration
Generate barcode samples during design phases for testing scanner compatibility, label design mockups, packaging prototypes, and integration testing before final production, allowing designers and developers to validate barcode placement, sizing, and readability in actual application contexts.
Event ticketing and access control systems
Create unique barcode identifiers for event tickets, access passes, or registration codes using CODE 128 or CODE 39 symbologies, enabling automated check-in systems, entry verification, and attendee tracking for events, conferences, or facilities requiring barcode-based access control.
Use high contrast color combinations (dark bars on light background, ideally black on white) for optimal scanner readability, as low contrast barcodes may fail to scan reliably even if visually readable, causing scanning failures that disrupt workflow and require reprinting or manual data entry.
Ensure quiet zones (blank margins on both sides of the barcode) meet minimum recommendations (typically 10 times the narrow bar width) for your symbology, as insufficient quiet zones cause scanner misreads and failures, requiring adequate white space around barcodes for reliable optical scanning.
Print and test a sample barcode with your actual scanning hardware before generating large batches or production runs, as different scanners, printer resolutions, and material surfaces can affect readability, catching compatibility issues early before costly reprints or production delays.
Keep human-readable text displayed below barcodes for manual entry fallback when scanning fails, ensuring data can still be captured manually during scanner malfunctions, low-light conditions, or damaged barcode scenarios, maintaining workflow continuity despite technical issues.
Validate input data format against symbology requirements before generation (EAN/UPC require exact digit counts with checksums, CODE 39 has character set limitations), preventing invalid barcode generation that would fail validation or scanning, saving time by catching format errors early.
Adjust barcode dimensions appropriately for intended printing size and scanner distance, as barcodes that are too small may be unreadable at typical scanning distances, while oversized barcodes waste label space—test different sizes to find optimal dimensions for your specific use case.
Use batch processing for generating multiple related barcodes (product lines, inventory items, sequential IDs) to maintain consistency in design and settings, rather than generating individually with potentially inconsistent configurations that could affect scanning reliability or visual appearance.
Test barcode readability using the built-in scanner feature before deploying to production, uploading a test print or screenshot to validate that the generated barcode actually scans correctly, catching potential issues with color, contrast, or encoding before costly production or deployment mistakes.
Using the wrong symbology for your application, such as generating CODE 39 barcodes for retail products that require EAN-13 or UPC-A for point-of-sale systems, causing retailer rejection, compliance failures, or inability to process products through standard retail supply chains.
Entering invalid data formats for numeric-only symbologies like EAN-13, EAN-8, or UPC-A, which require exact digit counts and valid checksums, resulting in barcode generation failures or incorrect checksum calculations that produce unreadable barcodes that fail validation.
Generating barcodes that are too small for reliable scanning, not accounting for typical scanner distance and resolution requirements, causing scanner read failures, manual data entry requirements, and workflow disruptions when barcodes cannot be scanned at operational distances.
Ignoring quiet zone (margin) requirements around barcodes, placing barcodes too close to edges, borders, or other design elements, which prevents scanners from properly detecting barcode start/stop patterns and causes consistent scanning failures even with otherwise valid barcode designs.
Using low contrast color combinations (light bars on light backgrounds, or colors that appear similar) that reduce scanner reliability, as optical scanners depend on clear contrast between bars and spaces, causing scanning failures even when barcodes appear visually clear to human eyes.
Not validating barcode readability with actual scanning hardware before production deployment, assuming that visual appearance guarantees scannability, leading to production batches of unreadable barcodes that require expensive reprinting or manual workarounds.
Forgetting to include human-readable text below barcodes for manual entry fallback, leaving no backup method when scanning fails due to printer issues, barcode damage, scanner malfunctions, or environmental conditions that prevent successful automated scanning.
Generating barcodes with incorrect checksums by manually calculating or guessing checksum values instead of letting the tool automatically compute correct checksums, creating barcodes that appear correct but fail checksum validation during scanning or verification processes.
Mixing incompatible barcode settings (e.g., applying color filters that reduce contrast, setting dimensions that violate minimum size requirements) without testing the combined effect, creating barcodes that meet individual requirements but fail when settings are combined in actual usage.
Not considering printing resolution and material when setting barcode dimensions, as low-resolution printers or absorbent materials may blur barcodes, requiring larger minimum sizes than high-resolution printing on smooth materials, leading to unreadable barcodes if dimensions are too small for print quality.
Using batch generation without verifying the first few samples, assuming all generated barcodes are correct, when input data validation or encoding issues could affect multiple barcodes, wasting time and resources generating large batches of invalid or unreadable barcodes.
Not saving or documenting barcode generation settings (symbology, dimensions, colors) used for specific projects, requiring manual recreation of settings for similar future projects, losing time and potentially introducing inconsistencies in barcode appearance or configuration across related projects.
Choose based on your use case: retail products require EAN-13 (international) or UPC-A (North America) for point-of-sale compatibility. General purpose or alphanumeric needs: CODE 128 (most flexible) or CODE 39. Shipping/logistics: ITF-14. Manufacturing: MSI. Libraries: Codabar. Pharmaceuticals: Pharmacode. Consult industry standards or system requirements for specific symbology mandates in your field.
Common causes include insufficient quiet zones (add more margin space around barcode), low contrast colors (use black bars on white background), barcode too small for scanner resolution (increase dimensions), incorrect symbology for your scanner type, or printing quality issues. Test with the built-in scanner feature and ensure high contrast, adequate size, and proper margins.
Yes, use the batch processing feature: paste your values (one per line) in the batch input area, click Generate All to create barcodes for all values simultaneously, review results in the grid, and download all barcodes as a ZIP archive file containing individual image files for each barcode, enabling efficient bulk generation and file management.
The tool generates raster images (PNG or JPEG) using HTML5 canvas technology, suitable for most printing and display applications. For vector SVG output, you would need specialized barcode libraries or design software that supports vector barcode generation, though raster images work well for most practical applications including label printing and digital displays.
CODE 128 supports full ASCII character set (letters, numbers, symbols) with higher density and automatic checksum calculation, making it ideal for complex identifiers. CODE 39 supports alphanumeric characters plus some symbols, uses asterisks as delimiters, and is simpler but less dense. CODE 128 is generally preferred for new applications due to greater flexibility and better error detection.
No, the tool automatically calculates and appends correct checksum digits for EAN-13, EAN-8, UPC-A, and other symbologies that require checksums. Simply enter the required number of digits (12 for EAN-13, 11 for UPC-A), and the tool computes and adds the checksum digit automatically, ensuring valid barcode generation without manual calculation.
Yes, you can customize bar color and background color for branding, but maintain high contrast (dark bars on light background) for scanner readability. Avoid light bars on light backgrounds or colors that appear similar, as optical scanners require clear contrast. Test colored barcodes with actual scanners, as some scanners may struggle with non-black barcodes despite visual clarity.
Quiet zones are blank margins (typically white space) required on both sides of barcodes, usually 10 times the narrow bar width minimum. Scanners need this space to properly detect barcode start and stop patterns. Without adequate quiet zones, scanners cannot reliably read barcodes, causing consistent scanning failures even with otherwise correctly generated barcodes.
The tool provides real-time validation showing error messages if input data doesn't match symbology requirements (wrong character set, incorrect length, invalid format). Green validation status indicates valid input. Each symbology has specific rules: EAN/UPC require exact digit counts, CODE 39 has character limitations, CODE 128 is most flexible. Review validation messages to correct input issues.
Yes, use the template save/load feature to preserve your preferred settings (symbology, dimensions, colors, margins, text display options) for reuse. This streamlines workflow when creating consistent barcode designs for recurring projects, maintaining branding consistency, and avoiding manual setting recreation for similar barcode generation tasks across different sessions.
The tool supports PNG and JPEG image formats. PNG is lossless and recommended for high-quality printing, design integration, or when exact pixel precision matters. JPEG provides smaller file sizes suitable for web use or when file size is a concern, though slight compression artifacts may occur. Choose based on your quality requirements and intended use case.
All barcode generation happens entirely locally in your browser using the JsBarcode JavaScript library. No data, images, or barcode information is uploaded to external servers, ensuring complete privacy and security for sensitive product codes, inventory identifiers, or proprietary information encoded in your barcodes.