Free Dictionary API alternatives

Definitions, phonetics, pronunciations, parts of speech, examples, synonyms. If it doesn't fit your project, here are the 10 best free Dictionaries APIs to use instead in 2026, out of 14 in the directory.

For reference, Free Dictionary API: No API key needed · HTTPS.

1. 1

   Random Lexicon API

   Online · 592 ms

   Random words and definitions using optional filters.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
2. 2

   Wiktionary API

   Online · 942 ms

   Collaborative dictionary data. A free dictionaries API by Wiktionary.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
3. 3

   WordSoHard API

   Online · 500 ms

   Word definitions with Scrabble validity and tile score in one call, built for word games.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
4. 4

   Chinese Text Project API

   Online · 860 ms

   Online open-access digital library for pre-modern Chinese texts.

   • No API key needed
   • HTTPS

   No authHTTPSCORS ?
5. 5

   SayItVid API

   Online · 749 ms

   English video pronunciation search with timestamps, IPA phonetics and subtitle context.

   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
6. 6

   Collins API

   Online · 61 ms

   Bilingual Dictionary and Thesaurus Data.

   • Fast: 61 ms response
   • HTTPS

   apiKeyHTTPSCORS ?
7. 7

   Synonyms API

   Online · 954 ms

   Synonyms, thesaurus and antonyms information for any given word.

   • HTTPS

   apiKeyHTTPSCORS ?
8. 8

   Merriam-Webster API

   Online · 690 ms

   Dictionary and Thesaurus Data. A free dictionaries API by dictionaryapi.com.

   • HTTPS

   apiKeyHTTPSCORS ?
9. 9

   Oxford API

   Online · 1071 ms

   The Oxford Dictionaries API gives you access to our world-renowned dictionary data, including definitions, translations, synonyms, and audio pronunciations.

   • HTTPS

   apiKeyHTTPSNo CORS
10. 10

    Wordnik API

    Online · 1565 ms

    The Wordnik API: All the words.

    • HTTPS

    apiKeyHTTPSCORS ?

Free Dictionary API vs alternatives

Free Dictionary API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
Free Dictionary	No	Yes	Unknown	Up	620 ms	Not rated
Random Lexicon	No	Yes	Yes	Up	592 ms	Not rated
Wiktionary	No	Yes	Yes	Up	942 ms	Not rated
WordSoHard	No	Yes	Yes	Up	500 ms	Not rated
Chinese Text Project	No	Yes	Unknown	Up	860 ms	Not rated
SayItVid	Required	Yes	Yes	Up	749 ms	Not rated
Collins	Required	Yes	Unknown	Up	61 ms	Not rated
Synonyms	Required	Yes	Unknown	Up	954 ms	Not rated
Merriam-Webster	Required	Yes	Unknown	Up	690 ms	Not rated

See also: best Dictionaries APIs · all Dictionaries APIs