calculate_check_digits
Add the GS1 check digit to GTIN numbers that are missing it (7, 11, 12 or 13 digits become GTIN-8, UPC-A, EAN-13 or GTIN-14). One number per line or comma separated.
codesrequired
com.eancheckPublished by eancheck.comOfficial publisherv1.0.0Updated Nov 7, 2026
GS1 check digits, code identification, UPC-E and ISBN conversion, GTIN repair and barcodes.
Barcode and GS1 tools that let an assistant compute check digits, validate and repair GTINs, identify codes, convert UPC-E and ISBN, parse GS1 data, and…
Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.
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{
"mcpServers": {
"ean-check-barcode-tools": {
"type": "http",
"url": "https://eancheck.com/api/mcp"
}
}
}Add the GS1 check digit to GTIN numbers that are missing it (7, 11, 12 or 13 digits become GTIN-8, UPC-A, EAN-13 or GTIN-14). One number per line or comma separated.
codesrequiredCheck complete GTIN, EAN, UPC and ITF-14 numbers: says for each one whether the check digit is right and which GTIN length it is.
codesrequiredFind out what kind of code a string is: GTIN, ISBN, ISSN, SSCC, GLN, GS1-128 data, GS1 Digital Link, VIN, IMEI, ASIN, Amazon LPN or FNSKU, with its check digit status.
coderequiredRead the code from an Amazon sticker: tells an LPN (License Plate Number) from an FNSKU, ASIN, FBA box label, Amazon Logistics tracking number or UPC/EAN, and explains each part. It cannot look up which product a code belongs to.
coderequiredConvert a UPC-E (6, 7 or 8 digits) to the full 12-digit UPC-A, or a UPC-A to UPC-E when one of the four GS1 zero-suppression rules fits. Checks the check digit.
coderequiredConvert an ISBN-10 to ISBN-13 or back, with the check digit recalculated and the hyphenated form. ISBN-13 starting with 979 has no ISBN-10.
isbnrequiredRecover a GTIN with unreadable digits: mark each unknown digit with ? or * and get every number that passes the GS1 check digit.
coderequiredSplit GS1 data (GS1-128, GS1 DataMatrix, Digital Link) into its Application Identifiers, with the name of each AI and any format error.
datarequiredDraw a print-ready barcode and return it as SVG (or EPS) in millimetres, plus a link that opens it in the generator. Types: upc-a, ean-13, ean-8, itf-14, code-128, code-39, code-93, interleaved-2-of-5, codabar, msi, pharmacode, data-matrix, pdf417, aztec. GS1 retail types use magnification 80 to 200 (percent).
gs1typerequiredx_mmvaluerequiredformatmagnificationGive the printed size of a barcode type at a GS1 magnification (retail and carton types) or an X-dimension, with the GS1 allowed range.
typerequiredx_mmmagnification83% of the applicable checks met
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