E-commerce product data
Barcodes, listings, feeds, shipping paperwork and the compliance wording around them.
🔒 Every tool here runs in your browser — your data never leaves it.
- Product identifiers 14
- Listing content 5
- Images & media 4
- Prices & numbers 2
- Shipping & logistics 7
- Feeds & files 8
- Compliance wording 2
- Storefront & SEO 5
- Selling across borders 5
- Data hygiene 5
Product identifiers 14
Barcodes and the other numbers that name a product.
- GTIN / UPC / EAN ValidatorValidate barcodes in bulk: check digits, GS1 prefixes, Excel corruption, restricted ranges and placeholder codes.
- GTIN Check Digit CalculatorComplete a UPC, EAN or GTIN-14 from its first digits — with the step-by-step Mod-10 calculation shown.
- GTIN Format ConverterConvert barcodes between UPC-A, EAN-13 and GTIN-14 case codes in bulk — validated first, check digits recalculated, CSV out.
- GS1-128 ParserDecode the string under a logistics barcode into its Application Identifiers — with the FNC1 separator rule that most parsers get wrong.
- GS1 Digital Link CheckerCheck a Digital Link URI against the current standard — qualifier order, the new 14-digit GTIN rule, removed alphabetic names — and get the corrected URI back.
- VIN Check Digit ValidatorVerify a VIN check digit, decode its sections, and see every model year the year code could mean — the ambiguity most decoders hide.
- IMEI ValidatorCheck an IMEI Luhn digit, complete a 14-digit one, and tell IMEI apart from IMEISV — the 16-digit form no checksum can validate.
- Container Number ValidatorValidate a shipping container number against ISO 6346 — including the letter values that skip multiples of 11, where hand-written code always goes wrong.
- Barcode GeneratorGenerate print-ready EAN-13, UPC-A, EAN-8 and ITF-14 barcodes as SVG — with the check digit validated before anything is drawn.
- UPC-E ⇄ UPC-A ConverterExpand the short 8-digit barcode on small packages to its full UPC-A — with the zero-suppression rule shown, and EAN-8 told apart from UPC-E.
- ISBN Converter & ValidatorConvert ISBN-10 ⇄ ISBN-13 with both forms shown at once — correct mod-11 check character, and an honest answer for 979 ISBNs.
- SSCC & GLN ValidatorValidate GS1 logistics and location keys: 18-digit SSCC pallet codes and 13-digit GLNs, including the leading zero spreadsheets eat.
- ISSN & ISRC ValidatorCheck journal ISSNs (which have a check digit) and recording ISRCs (which have none), and convert between an ISSN and its 977 barcode.
- CAS & NDC Code CheckerVerify CAS Registry check digits and convert NDC drug codes to the 11-digit billing form — showing all three readings when the hyphens are missing.
Listing content 5
The text a buyer reads, and the limits each marketplace puts on it.
- Description HTML CheckerSee which parts of a product description HTML the marketplace will silently remove — and which unclosed tag is breaking the page around it.
- Slug & Handle GeneratorTurn titles into URL slugs and Shopify handles — showing both romanisations where a name has two, and what the platform silently creates when handles collide.
- Amazon Search Terms Byte CounterCount backend keywords in bytes (not characters), see which words cost the most, and catch the waste that silently kills indexing.
- Product Title CheckerCheck a title against every marketplace's length limits and style rules, with the problems highlighted on the words themselves.
- Bullet Point Linter & Claim ScreenerCheck listing bullets for length, caps, HTML and off-platform contact details, and screen the copy for FDA/FTC claim language — with the reason each phrase is risky.
Images & media 4
What a platform will reject about a file before anyone sees it.
- Colour Space CheckerFind out whether an image is secretly CMYK — the one defect that looks completely normal until the marketplace rejects it.
- EXIF Privacy CheckerSee whether a product photo carries GPS coordinates, your name or a camera serial number — and strip them without re-encoding the image.
- Amazon Main Image CheckerSee the actual RGB of your image's background — the difference between 250 and 255 that your eye cannot catch but Amazon's scanner does.
- Media Spec AuditorAudit a whole batch of images and videos against every marketplace’s size, file size and format limits — as a matrix.
Prices & numbers 2
Values that mean different things depending on who reads them.
- Feed Unit ConverterConvert dimensions and weights in bulk and see what rounding to the field precision actually costs — the factors are exact, the rounding is not.
- Price & Number Format CheckerCatch the ambiguous decimal separator that turns 19,99 into 1999 — plus ISO 4217 currency codes and their decimal places.
Shipping & logistics 7
Getting the goods, and the paperwork, to move.
- Lithium Battery CheckerWork out watt hours correctly — the cell voltage, not the USB output — and see which passenger-carriage band a battery falls into.
- Air Waybill ValidatorCheck an 11-digit air waybill number against its modulo-7 check digit — and learn why none of them ever ends in 7, 8 or 9.
- Tracking Number Carrier IdentifierWork out which carrier a tracking number belongs to — and verify its check digit where the algorithm is public, instead of guessing from the shape.
- Dimensional Weight CalculatorCompare dimensional weight across carrier divisors, and get the break-even box size at which volume stops setting the price.
- UN Number LookupSearch the Hazardous Materials Table by product name or UN number, and see every entry sharing that number with its own limits.
- Incoterms CheckerCheck whether a trade term is valid for how the goods actually travel — FOB on a container is the classic contract error.
- HS Code CheckerCheck a tariff code against every published heading and subheading - and see what each pair of digits means, and who decides it.
Feeds & files 8
Whole files — before you upload them, and after a spreadsheet has been at them.
- Google Shopping Feed ValidatorCatch Merchant Center disapprovals before you upload: required attributes, GTIN validity, identifier logic, price and enum formats.
- Shopify Product CSV ValidatorCheck a product CSV before importing — including the handle collisions that silently overwrite live products.
- CSV Dialect DetectorFind out which CSV dialect a file actually is — delimiter, quoting, line endings, BOM — detected by column consistency, not by counting commas.
- Excel Damage DiagnosticFind out what a spreadsheet broke in your column — and whether each value can still be repaired or is gone for good.
- Product Feed DiffCompare two feed exports aligned by SKU rather than by line — so reordered rows produce no false differences.
- Marketplace Feed ValidatorCheck a product feed for Meta, TikTok, Walmart or Amazon — and catch the values that are correct on the platform you copied it from.
- Google ⇄ Meta Feed ConverterConvert a Google Shopping feed to a Meta catalog feed - translating the values that differ and leaving blank the two that have no equivalent.
- Feed RepairerRepair a damaged feed in one pass - mojibake, spreadsheet damage, invisible characters - and get a list of every cell it would not guess at.
Compliance wording 2
Statements where the law fixes the words and “close” loses the safe harbour.
- Compliance Statement CheckerCheck Prop 65 warnings against the safe-harbour wording, allergen declarations against the nine major US allergens, and CE / UKCA / FCC claims for a verifiable reference.
- Textile Label CheckerCheck fibre content against 16 CFR 303 — including the under-5% "other fiber" rule — and care wording against 16 CFR 423.
Storefront & SEO 5
Markup that fails silently — the page looks fine and the machine sees nothing.
- Product JSON-LD CheckerValidate Product structured data without publishing the page — including the barcode, the currency and the comma that turns 19,99 into nothing.
- UTM CheckerCompare a whole set of campaign URLs and find the values that differ only by case — the split that every single-URL checker misses.
- hreflang CheckerValidate hreflang annotations and get back the identical block every page in the set must carry — starting with why en-UK does nothing.
- Open Graph CheckerSee the share card your meta tags produce, and catch the two failures a browser never shows: name= instead of property=, and relative image URLs.
- Email Merge Field CheckerRender an email template with a full record and with the fields empty, and catch unclosed merge fields or two syntaxes pasted into one template.
Selling across borders 5
Formats that change at every border you cross.
- Postcode Format CheckerCheck a postcode column against each country’s usual format — separating a spacing problem from one that needs a real lookup.
- Country Code CheckerCheck and convert ISO 3166-1 country codes — and find the ones that look right but are not assigned, starting with UK.
- IBAN & SWIFT/BIC ValidatorCheck IBAN check digits and per-country layout, and SWIFT/BIC structure — including test BICs, which look completely normal until a payment fails.
- EU VAT & EORI CheckerCheck EU VAT numbers and EORI numbers against their published formats — including the GR-for-EL and GB-for-XI prefix traps.
- Shoe Size ConverterConvert EU, UK and US shoe sizes from the unit definitions with the working shown — and see why apparel size charts are not trustworthy.
Data hygiene 5
Characters and values that are not what they look like.
- Mojibake FixerRepair text mangled by an encoding mix-up — by working out the actual encoding chain, not by matching a substitution table.
- Mixed Script DetectorFind full-width punctuation and lookalike letters from another script — the characters that survive proofreading because they look right.
- Date Format CheckerShow every reading of an ambiguous date, decode spreadsheet serial numbers, and check Merchant Center date ranges and time zones.
- Invisible Character DetectorFind the zero-width spaces, BOM and look-alike characters hiding in your text — and see what each one is doing to your data.
- Duplicate & Variant Value AuditorFind which values in a column are the same thing — exact duplicates, spelling differences, and synonym sets like L and Large.
What these have in common
Every tool on this page publishes the complete list of checks it runs — each with an identifier, a severity, a plain-English explanation of why it matters, a fix, and a link to the official source it comes from. Where a rule is our own engineering judgement rather than a published requirement, it says so.
They also all state what they cannot tell you. A postcode checker that says a value does not match the usual pattern is not saying the address is wrong; an IBAN that passes mod-97 is not a real bank account. Being clear about that boundary is the difference between a tool you can act on and one you have to double-check.