EAN Checker Online
Validate EAN-13 and EAN-8 barcodes instantly. Verify check digits using the modulo-10 algorithm — 100% free and private.
Supports 13-digit (EAN-13) and 8-digit (EAN-8) formats.
What Is an EAN Code?
Understanding the barcode standard behind global retail.
EAN-13
EAN-13 is the most widely used barcode format worldwide. It contains 13 digits: a country prefix, manufacturer code, product code, and a check digit. Nearly every product on supermarket shelves carries an EAN-13 barcode.
EAN-8
EAN-8 is a compact version of EAN-13 designed for smaller products where label space is limited. It uses 8 digits and follows the same check digit validation algorithm.
How the EAN Check Digit Works
Understand the modulo-10 algorithm that validates every barcode.
The Modulo-10 Algorithm
EAN barcodes use a mathematical formula to ensure scanners read them correctly. The final digit is a "check digit" calculated from the preceding numbers using three steps.
- Multiplies each digit alternately by 1 and 3 (left to right).
- Sums all weighted values together.
- Calculates the remainder mod 10 and subtracts from 10 to get the check digit.
Why Use This EAN Checker?
Instant Validation
Results appear as you type — no form submission or page reload needed.
100% Private
All processing happens in your browser. No data is sent to any server or stored anywhere.
Completely Free
No registration, no usage limits, no hidden costs. Validate as many barcodes as you need.
Common Use Cases
📦 Product Listing Verification
Before listing products on marketplaces like Amazon, eBay, or Shopify, verify that EAN barcodes are valid to avoid listing errors and rejections.
🏭 Manufacturing QA
Quality assurance teams can quickly verify barcode correctness before products are packaged and shipped to retailers.
🛒 Retail Inventory
Retailers can check whether received goods carry valid barcodes that will scan correctly at the point of sale.
📊 Data Entry Audit
Verify that manually entered EAN numbers in spreadsheets and databases are accurate and contain valid check digits.
Frequently Asked Questions
What is an EAN code?
An EAN (European Article Number) is a standardized barcode used worldwide for identifying retail products. EAN-13 uses 13 digits and is the most common format, while EAN-8 uses 8 digits for smaller packages.
What is the difference between EAN-13 and EAN-8?
EAN-13 contains 13 digits and is the standard barcode for most retail products. EAN-8 contains only 8 digits and is designed for smaller items where label space is limited. Both use the same modulo-10 check digit algorithm.
Is this EAN checker tool private and secure?
Yes. All barcode validation runs entirely in your web browser using JavaScript. Your barcodes are never sent to any server or stored anywhere.
Can I validate UPC barcodes with this tool?
UPC-A barcodes are a subset of EAN-13. To validate a 12-digit UPC-A barcode, simply prepend a leading zero to create a 13-digit number, then use this EAN checker.
What happens if the check digit is wrong?
If the check digit does not match the expected value, the barcode is considered invalid. This tool will display the expected check digit alongside the incorrect one so you can correct the error.
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