Free Tool

Cologne Phonetic Algorithm

Phonetic algorithm optimized for German-language names — "Müller" and "Mueller" encode identically.

Tilores uses the Cologne phonetic algorithm in production — so you can automate matching with rules you configure.

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String A

String B

Cologne Codes

657 / 657

Match

How it works

The Cologne phonetic algorithm (Kölner Phonetik) was developed specifically for the German language. Unlike Soundex, which is English-focused, Cologne phonetic correctly handles German phonetic patterns including umlauts (ä, ö, ü), sharp s (ß), and German consonant combinations. This makes it essential for entity resolution in German-speaking markets, where name variations like "Müller/Mueller/Muller" or "Straße/Strasse" are common.

Use cases in entity resolution

German customer name matching

Address deduplication in DACH region

Cross-border identity resolution

German census data processing

Related tools

Jaro-Winkler Distance

Measure string similarity with extra weight for matching prefixes — ideal for name matching in entity resolution.

Soundex Phonetic Algorithm

Encode strings by their phonetic sound — names that sound alike produce the same Soundex code.

Metaphone Algorithm

Advanced phonetic encoding that improves on Soundex for English pronunciation patterns.

Don't implement this yourself

Tilores Studio runs the full matching engine — this algorithm plus configurable rules and real-time entity resolution — locally on your machine. Free, no account, no cloud. Load your own data and see it working in minutes.

Download Tilores Studio