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How Do We Get Clean Product Data From Suppliers Who Send Us Messy Spreadsheets?

B2B marketplaces receive supplier catalogues with missing specs, mixed units and odd categories. We build an intake that cleans, maps and scores each upload.

Updated 3 min readBy SpiderHunts Technologies

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Quick answer — TL;DR

Catalogue quality suffers because every supplier sends product data in their own spreadsheet layout, with missing attributes, mixed units and descriptions written for their own staff. We build a catalogue intake that maps each supplier's columns to your schema, standardises units and attributes, fills gaps from the supplier's own documents where it can, scores every listing for completeness and sends the rest back to the supplier with specific fixes.

Ten thousand rows, none of them usable as they are

A new industrial supplier sends their catalogue: a spreadsheet exported from their ERP, with columns named in their own shorthand, dimensions in millimetres for some lines and inches for others, pack sizes buried in the description, and no images for half the range. Another supplier sends a PDF price list. A third sends a feed that repeats every variant as its own product.

Your catalogue team spends days per supplier reshaping data before a single product can go live, and buyers still complain that listings are missing the specifications they need to order.

Why supplier data arrives in such poor shape

Suppliers' product data was built for their own purposes: their ERP, their price lists, their reps. It is not structured the way your marketplace categories and filters need. Trade buyers search and filter on specific attributes, such as material, size, thread, voltage, pack quantity or standard, and those are often missing or hidden in free text.

Every supplier is different, so a one-off cleanup does not help with the next one, and suppliers update their data regularly, bringing the same problems back.

Data problemEffect on buyers
Missing key attributesProducts do not appear in filtered searches
Mixed unitsWrong comparisons, wrong orders
Pack size in description onlyPrice per unit misunderstood
Variants as separate productsCluttered search results
Poor or no imagesBuyers do not trust the listing

What poor catalogue data costs

Products buyers cannot find are products they cannot buy. Products with unclear pack sizes or units lead to wrong orders, returns and disputes between buyer and supplier, which your team then mediates. Slow catalogue onboarding delays new suppliers going live. And buyers who find listings unreliable go back to phoning suppliers directly.

Search and advertising suffer too. Listings without structured attributes rank poorly in your own search and give little to work with in product feeds or category pages, so good suppliers look worse than they are.

The catalogue intake we build

  1. Column mapping: each supplier's file layout is mapped to your product schema once, with AI suggesting mappings for new files and a person confirming; the mapping is reused for every update from that supplier.
  2. Attribute extraction: attributes hidden in descriptions, such as size, material and pack quantity, are extracted into structured fields, with confidence scores.
  3. Standardisation: units are converted to your standard, values are normalised, such as consistent material names, and variants are grouped under parent products.
  4. Gap filling: where suppliers provide datasheets or spec sheets, missing attributes are read from those documents, marked as extracted so they can be checked.
  5. Completeness scoring: every listing gets a score against the attributes your category requires, and listings below your threshold are held or shown with lower prominence, as you decide.
  6. Supplier feedback: suppliers receive a report of specific fixes, such as 40 products missing voltage, with a template to return, rather than a general request to improve their data.

What catalogue work looks like afterwards

New supplier catalogues go through the intake, and the catalogue team reviews the uncertain extractions and mappings rather than reshaping every row. Updates from existing suppliers are processed with the saved mapping. Buyers see consistent attributes and filters that work across suppliers, and your team can see which suppliers' data is holding back their sales.

Is your catalogue data holding you back?

  • Every new supplier's data is cleaned by hand.
  • Filters return incomplete results because attributes are missing.
  • Units and pack sizes are inconsistent between suppliers.
  • Buyers order the wrong quantity because pack sizes are unclear.
  • Supplier updates reintroduce problems you already fixed.

FAQ

Frequently asked questions

The questions readers ask us after this guide.

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Can AI extraction be trusted with product specifications?

It is good at pulling attributes from text and documents, and every extracted value carries a confidence score. Uncertain values are reviewed, and suppliers remain responsible for their product data.

Does this work with our marketplace platform?

Yes, if products can be created and updated through an API or import, which covers most platforms.

What about PDF price lists?

PDFs can be read and turned into structured rows, with more review needed than for spreadsheets.

Do suppliers need to change how they send data?

No. They can keep sending their own files. Suppliers who want to improve can use the template the feedback report provides.

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