Does this tool decode barcodes from image files?

Yes. You can drag and drop barcode and QR code images (PNG, JPG, WEBP up to 10MB) directly into the file upload tab. The tool will decode the images locally in your browser using the native Web BarcodeDetector API (with a secure client-side JS library fallback for unsupported browsers) and validate the output.

Why does this tool not use AI to validate barcodes?

Barcode validation is a deterministic, mathematical process. The Modulo-10 checksum either matches or it does not. A GS1 Application Identifier either has the correct field length or it does not. Using a generative AI model for this task would introduce hallucination risk — a model that guesses a plausible check digit to make a corrupted code "look right" is producing a wrong answer, not a correct one. In supply chain logistics, a hallucinated GTIN-14 or tracking number is infinitely worse than a failed validation.

What GS1 Application Identifiers are supported?

The parser supports all common GS1 Application Identifiers from the published GS1 standard, including AI (00) SSCC, AI (01) GTIN-14, AI (02) GTIN of contained trade items, AI (10) batch/lot number, AI (11) production date, AI (13) packaging date, AI (15) best before date, AI (17) expiration date, AI (20) variant, AI (21) serial number, AI (30) count, and AI (37) quantity. Fixed-length AI fields are validated against their specified character count. Date fields are validated against the YYMMDD format.

How do I format my barcode data for upload?

Three formats are accepted. First, JSON exports from scanner apps using either {"format":"EAN_13","rawValue":"5901234123457"} or {"symbology":"EAN_13","value":"5901234123457"} field names. Second, tab-separated text with the symbology name in the first column and the payload in the second column. Third, plain newline-delimited values where the symbology is marked as UNKNOWN and only payload checks that do not require a symbology (such as checksum and GS1 parsing) are applied.

Is the URL reachability check safe to use with internal systems?

Yes. The URL reachability check is protected by a strict SSRF blocklist that blocks all requests to localhost, RFC 1918 private IP ranges (10.x.x.x, 172.16-31.x.x, 192.168.x.x), link-local addresses (169.254.x.x), the AWS Instance Metadata Service endpoint, IPv6 loopback, and IPv6 ULA ranges. The tool will report a compliance error if a QR code payload contains a URL that resolves to any blocked address.

Can I use this validator inside an automated workflow?

Yes. The barcode_qrcode_validation rule is available via the TaskVerified REST API and can be embedded in the Rules Playground pipeline builder. You can nest it inside conditional logic trees, for example: check file type first, then run checksum validation, and only run URL reachability if the payload contains a QR code URL.

Free Barcode and QR Code Validator — GS1, EAN, UPC, QR | TaskVerified

Free Barcode and QR Code Validator — GS1, EAN, UPC, QR | TaskVerified | TaskVerified