The NATO phonetic alphabet, formally the ICAO/NATO spelling alphabet, replaces each letter with an unambiguous code word — Alpha, Bravo, Charlie, and so on. It is used in aviation, the military, emergency services and call centres so that letters survive noisy radio or phone channels without being misheard. This free tool converts any text into phonetic code words and decodes phonetic spellings back to plain letters, all instantly in your browser.
How it works
Each of the 26 letters maps to a fixed code word chosen to be distinct from every other word, even under heavy distortion: B is Bravo (not confusable with D), and M is Mike (not confusable with N). When encoding, the tool looks up each letter and joins the code words with spaces; digits are spelled out as words and spaces between words become a slash so word boundaries survive the spoken sequence.
Decoding reverses the table: each space-separated code word is matched case-insensitively to its letter. Words that are not recognised are passed through in brackets so nothing is silently dropped.
Encoding and decoding examples
| Input | Phonetic output |
|---|---|
| GERA | Golf Echo Romeo Alpha |
| SW1A | Sierra Whiskey One Alpha |
| OK | Oscar Kilo |
Decoding Tango Echo Sierra Tango returns TEST. Decoding Foxtrot Uniform November returns FUN. Any word not in the standard table appears in brackets so you can see exactly where the decoder made no match.
When to use a phonetic converter
The most common real-world uses are confirming reference codes and serial numbers over the phone (where a spoken digit or letter can be ambiguous), verifying vehicle registration plates, reading out email addresses letter by letter, and checking booking or ticket references with customer support. Aviation crews use it constantly for call signs, waypoints, and runway identifiers. The decoder is useful when you receive a phonetic spelling by radio or in writing and need to quickly recover the original text.
Encoding notes
Digits are encoded as their plain English word (Zero, One, Two … Nine) rather than the ICAO radiotelephony forms (Niner, Fife, Tree) used in aviation. This keeps the output immediately readable to a general audience. If you need the full aviation pronunciation including digit respellings, see the NATO Alphabet and ICAO Digit Pronunciation tool, which covers those forms alongside the letter alphabet.
Everything runs locally in your browser using a built-in lookup table, so nothing you type is sent anywhere.