Paste a GS1 element string and see every problem at once, with the exact fix. Runs entirely in your browser (pure-Swift engine compiled to WebAssembly). Nothing is uploaded.
The box at the top isn't a mock-up. It's the exact pure-Swift engine — compiled to WebAssembly and running in your browser — so you can check its answers yourself, with nothing uploaded. The paid API runs that same engine server-side to produce the full GS1 Data Matrix preflight report.
Drop a GS1 element string into the validator above. It runs locally in your browser, so nothing you type is uploaded.
Check digits, AI syntax, date sanity and structure, each pinned to the exact character with a suggested fix.
Correct the code before it reaches print or a retailer's scanner, and skip the reprints and rejected shipments.
The browser validator stays free forever. The API is metered per request, billed monthly. Cancel anytime.
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