IDN and Punycode converter
Convert internationalized domain names between Unicode and validated ASCII labels locally, one name or a batch.
Text, files and images are processed in your browser and are not uploaded.
Result
Run the tool to see the result.
How to use
Enter up to 100 domain names, one per line. URLs, ports, email addresses and IP addresses are rejected. Browser IDNA normalization and Punycode decoding use a validated round trip. Labels are limited to 63 ASCII bytes and domains to 253 bytes, excluding a final root dot. Conversion does not check existence, ownership or homograph safety.