Dictionaries
Every listing carries the same fields in the same order. Counts beside each filter update as you narrow.
| API | Pricing | Auth | Format | Free tier | Status |
|---|---|---|---|---|---|
Chinese Text ProjectFull texts and metadata for pre-modern Chinese philosophy, history and literature works. Data & Knowledge › Dictionaries | Freemium | API key | JSON | — | Live |
DatamuseFinds words matching meaning, sound, spelling pattern or related-word constraints for language tools. Data & Knowledge › Dictionaries | Free | None | JSON | 10k+/day | Live |
eeemojiLooks up emoji metadata by name: keywords, category, platform shortcodes and skin-tone variants. Data & Knowledge › Dictionaries | Free | None | JSON | 10k+/day | Live |
Free Dictionary APIEnglish word definitions, phonetics, parts of speech, examples and synonyms, no key needed. Data & Knowledge › Dictionaries | Free | None | JSON | Unlimited | Down |
Merriam-WebsterWord definitions, etymology, audio pronunciation and thesaurus data from Merriam-Webster's reference works. Data & Knowledge › Dictionaries | Freemium | API key | JSON | 1k–10k/day | Live |
Oxford Dictionaries APIDefinitions, pronunciations, synonyms and translations from Oxford's dictionary data, by word lookup. Data & Knowledge › Dictionaries | API key | JSON | — | Live | |
Random LexiconRandom English words with Wiktionary-sourced definitions, filterable by part of speech, tags, length. Data & Knowledge › Dictionaries | Free | None | JSON | Unlimited | Live |
Synonyms API (STANDS4)Looks up synonyms, antonyms and a short definition for an English word, in XML or JSON. Data & Knowledge › Dictionaries | Freemium | API key | XML | <100/day | Live |
WiktionaryWikimedia's collaborative dictionary: word definitions, etymologies, and translations by page title. Data & Knowledge › Dictionaries | Free | None | JSON | Unlimited | Live |
WordnikEnglish word definitions, synonyms, examples and audio pronunciations from five dictionaries. Data & Knowledge › Dictionaries | Freemium | API key | JSON | 1k–10k/day | Live |
WordsAPIDefinitions, synonyms, antonyms, rhymes and word relationships for over 150,000 English words. Data & Knowledge › Dictionaries | Freemium | API key | JSON | 1k–10k/day | Live |
Chinese Text ProjectFreemiumLive
Full texts and metadata for pre-modern Chinese philosophy, history and literature works.
API key · JSON
—
no machine-readable spec
DatamuseFreeLive
Finds words matching meaning, sound, spelling pattern or related-word constraints for language tools.
None · JSON
10k+/day
no machine-readable spec
eeemojiFreeLive
Looks up emoji metadata by name: keywords, category, platform shortcodes and skin-tone variants.
None · JSON
10k+/day
llms.txt
Free Dictionary APIFreeDown
English word definitions, phonetics, parts of speech, examples and synonyms, no key needed.
None · JSON
Unlimited
no machine-readable spec
Merriam-WebsterFreemiumLive
Word definitions, etymology, audio pronunciation and thesaurus data from Merriam-Webster's reference works.
API key · JSON
1k–10k/day
no machine-readable spec
Oxford Dictionaries APILive
Definitions, pronunciations, synonyms and translations from Oxford's dictionary data, by word lookup.
API key · JSON
—
OpenAPI spec
Random LexiconFreeLive
Random English words with Wiktionary-sourced definitions, filterable by part of speech, tags, length.
None · JSON
Unlimited
no machine-readable spec
Synonyms API (STANDS4)FreemiumLive
Looks up synonyms, antonyms and a short definition for an English word, in XML or JSON.
API key · XML
<100/day
no machine-readable spec
WiktionaryFreeLive
Wikimedia's collaborative dictionary: word definitions, etymologies, and translations by page title.
None · JSON
Unlimited
no machine-readable spec
WordnikFreemiumLive
English word definitions, synonyms, examples and audio pronunciations from five dictionaries.
API key · JSON
1k–10k/day
OpenAPI spec
WordsAPIFreemiumLive
Definitions, synonyms, antonyms, rhymes and word relationships for over 150,000 English words.
API key · JSON
1k–10k/day
no machine-readable spec
Nothing matches that combination. Clear the filters and start from the category.