How to use this tool
Enter the digits from a packaged-food barcode to look up the product name, brand, quantity, Nutri-Score, allergens, and per-100 g nutrition shown by the UI from Open Food Facts.
Decode international retail barcodes (EAN-13, UPC-A, GTIN) to inspect country prefix origins and verify check-digit validity using official GS1 algorithmic rules.
💡 3 Quick Steps to Get Started
Type the 8, 12, or 13-digit barcode number found on product packaging.
The tool calculates the GS1 Modulo-10 checksum to confirm the barcode is syntactically valid.
View the assigned GS1 Member Organization country prefix (e.g. 000-019 USA, 471 Taiwan, 490 Japan).
When it helps
Use a printed code for an initial packaged-food lookup. This tool has text input only, not camera scanning, and community data does not replace the package label.
How it works
The backend removes nondigits and sends only an 8-to-14-digit result to Open Food Facts. Results are cached in backend memory by barcode for 86,400 seconds. The UI shows name, brand, quantity, Nutri-Score, allergens, and four per-100 g nutrition values.
Worked example
Enter the 8-to-14-digit EAN or UPC printed on a package and check whether Open Food Facts has a matching food record.
Limits and data handling
Open Food Facts is community data and can be stale, incomplete, or different from the current package, so it cannot guarantee allergen or nutrition accuracy. The browser request times out after 20 seconds, and one client is limited to 25 Open Food Facts queries per 60 seconds. Missing products, rate limits, or provider failures return no result or an error.
The barcode is sent to the GoGo Tools backend and Open Food Facts and can remain in a barcode-keyed in-memory cache for up to 86,400 seconds. GoGo Tools does not build personal lookup history. Analytics may record the tool identifier, category, and locale, but not the barcode or result.
GS1 Barcode Standards, GTIN Architecture & Check Digit Handbook
1. GS1 GTIN Architecture: EAN-13 and UPC-A Standard
Global commercial supply chains rely on GS1 Global Trade Item Numbers (GTINs). The dominant formats are the 13-digit GTIN-13 (EAN-13 / JAN) and North America's 12-digit UPC-A.
An EAN-13 sequence consists of a GS1 Country Prefix (e.g., 000-139 USA/Canada, 471 Taiwan, 450-499 Japan, 880 South Korea), followed by the Company Prefix, Item Reference number, and terminal Check Digit.
2. The Modulo 10 Check Digit Algorithm
Barcode scanners detect reading errors using the standardized Modulo 10 weighting formula: Alternate positions are multiplied by 1 and 3, summed, and subtracted from the nearest multiple of 10. If the computed digit mismatches the printed check digit, the scan is rejected.
3. GS1 Prefix vs. Country of Origin Disambiguation
A common consumer misconception equates the GS1 prefix with physical manufacturing origin. The prefix designates the national GS1 Member Organization where the brand licensee registered, not the geographical factory location.
4. Open Product Registries and Data Verification
The lookup engine queries open global repositories (such as Open Food Facts and GEPIR directories) to resolve product names, nutrition metrics, and manufacturer metadata.
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FAQ
Barcode product lookup: Which barcode can I enter?
Paste a package barcode into the text field. The backend removes spaces, hyphens, and other nondigits, and the remaining value must be 8 to 14 digits. There is no camera scanner; blank or wrong-length input is rejected.
Barcode product lookup: Which results are shown?
The GoGo Tools backend queries Open Food Facts. The UI shows product name, brand, quantity, Nutri-Score, labeled allergens, and per-100 g values for energy, protein, carbohydrates, and fat. Results are cached in memory by barcode for 86,400 seconds.
Barcode product lookup: What limitations or errors apply?
Open Food Facts is community data and can be stale, incomplete, or different from the current package, so it cannot guarantee allergen or nutrition accuracy. The browser request times out after 20 seconds, and one client is limited to 25 Open Food Facts queries per 60 seconds. Missing products, rate limits, or provider failures return no result or an error.
Barcode product lookup: How is my barcode handled?
The barcode is sent to the GoGo Tools backend and Open Food Facts and can remain in a barcode-keyed in-memory cache for up to 86,400 seconds. GoGo Tools does not build personal lookup history. Analytics may record the tool identifier, category, and locale, but not the barcode or result.