Why this tool is useful
Use Cologne Phonetic when German pronunciation rules and names containing Ä, Ö, Ü or ß make an English Soundex key inappropriate.
Text & List Tools · runs locally
Cologne Phonetic Name Encoder
Produce Kölner Phonetik digit keys optimized for German names, including umlaut and Eszett preprocessing.
Ready. Your working data stays in this browser.
How it works
The browser uppercases with German-aware substitutions, maps letters by their neighbouring context, collapses consecutive codes and removes zeroes except when zero begins the key.
Practical example
Müller-Lüdenscheidt becomes 65752682 after umlaut folding, contextual digit mapping, duplicate collapse and internal-vowel removal.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.