MPN Normalizer
Free in-browser tool to normalize manufacturer part numbers — strip noise, standardize formatting, and surface duplicate parts. No upload, no login.
Paste a column of raw part numbers and this tool will normalize manufacturer part numbers into a consistent canonical form, then flag entries that collapse to the same value. It is built for distributors and catalog teams who need to deduplicate parts that look different on the page but refer to the same physical item.
MPN Normalizer
The interactive version of this tool is coming soon. It will run entirely in your browser — no login, no upload limits.
Planned tool: normalize manufacturer part numbers
Need this now? Talk to ClaroWhat it checks
For every part number you paste, the normalizer computes a cleaned, comparable form and reports what changed. Specifically, it:
- Trims and collapses whitespace, including leading/trailing spaces and non-breaking spaces pasted from spreadsheets.
- Standardizes case, so
bsh-1042xandBSH-1042Xresolve to one value. - Removes or isolates separators — hyphens, dots, slashes, and spaces — so
1/2-13X2and1/2 13 X 2can be compared on equal footing. - Strips common noise tokens such as packaging suffixes (
-EA,/PK,-BULK), leading zeros, and stray non-alphanumeric characters. - Flags near-duplicates by grouping inputs that share the same normalized key, so a 10,000-row paste surfaces clusters instead of a flat list.
- Preserves the original value alongside the normalized one, so nothing is lost and every transformation is auditable.
How normalizing manufacturer part numbers works
A manufacturer part number (MPN) is the identifier a manufacturer assigns to a product. Unlike a GTIN, there is no global standard for MPN format: lengths, separators, and casing vary by manufacturer and even by product line. That freedom is exactly why the same part arrives in your systems a dozen different ways — typed by a CSR, exported from an ERP, scraped from a supplier sheet, or re-keyed during a migration.
Normalization applies a fixed, repeatable pipeline so that two strings describing the same part produce an identical key:
- 1CleanStrip whitespace, control characters, and invisible formatting from the raw string.
- 2StandardizeApply consistent casing and a single separator convention.
- 3ReduceRemove noise tokens (pack/unit suffixes, leading zeros) that do not change part identity.
- 4Key & groupGenerate a normalized key and cluster every input that shares it.
The result is a stable comparison key — the same idea behind blocking in record linkage, where you cheaply group candidates before deciding what is truly a match.
This is useful across categories. In industrial distribution, fastener and bearing part numbers carry dimension and material codes that get formatted inconsistently. In CPG and furniture, the “MPN” is often a vendor SKU re-typed across price lists. In MRO, the same valve or filter shows up under several keyed variants after years of manual entry. Normalization gives all of them a single comparable form before you decide which records to merge.
Related resources
Glossary
SKU vs MPN vs GTIN
How a manufacturer part number differs from a SKU and a GTIN — and why each behaves differently when you deduplicate.
Tool
Duplicate SKU Finder
Paste a list and surface exact and near-duplicate SKUs in the same privacy-preserving way.
Tool
SKU / MPN Cross-Reference Builder
Build a crosswalk between your internal SKUs and manufacturer part numbers across suppliers.
Playbook
How to Deduplicate a Catalog
A step-by-step workflow for collapsing duplicate products without losing data.
Glossary
What Is Entity Resolution?
The discipline behind deciding when two records describe the same real-world product.
Claro
Identity resolution at catalog scale
See how Claro normalizes, matches, and deduplicates millions of part records with provenance and write-back.
FAQ
What does it mean to normalize a manufacturer part number?
Normalizing an MPN means transforming a raw, inconsistently formatted part number into a single canonical form — consistent casing, standardized separators, and noise tokens removed — so that two strings describing the same part can be compared and matched reliably. It is a prerequisite for accurate deduplication.
Why do the same parts have different part numbers in my data?
MPNs have no universal format standard, so the same item gets entered differently across ERPs, supplier feeds, and manual keying. Hyphens, spaces, casing, leading zeros, and pack suffixes (like -EA or /PK) drift over time and across sources. Each variant becomes a separate row, which is how duplicate products and split inventory accumulate.
Is it safe to paste my part numbers here?
Yes. All normalization runs entirely in your browser. Nothing is uploaded, there is no account, and the data never touches a server. You can close the tab and the data is gone.
Can this match part numbers across different manufacturers?
No — and that is intentional. This tool produces a comparable key from a single value; it does not resolve one manufacturer’s part to another’s equivalent or handle supersessions. For that, use the SKU / MPN Cross-Reference Builder, or a full identity-resolution layer that scores matches with confidence.
Does normalizing part numbers replace deduplication?
No. Normalization is the cleanup step that makes deduplication accurate. After you normalize, you still decide which clustered records to merge into one canonical product record. The deduplication playbook walks through that end-to-end workflow.