Dictionaries APIs

Language dictionaries and translations

13 APIs in this category
Showing 13 of 13 APIs

Best Dictionary and Translation APIs for Developers

A dictionary API allows developers to fetch word definitions, phonetic pronunciations, etymologies, synonyms, and translations programmatically. These APIs are essential for building vocabulary apps, language learning tools, and content enrichment pipelines.

CodeHelper's curated dictionary API collection includes APIs covering English definitions, multilingual translations, thesaurus data, and linguistic metadata.

What to look for in a dictionary API

  • Language coverage: For multilingual apps, confirm the API supports all languages your users need with quality definitions.
  • Audio pronunciations: APIs that include audio pronunciation files enhance language learning and accessibility features.
  • Part-of-speech tagging: Grammatical metadata (noun, verb, adjective) enables advanced linguistic analysis and NLP pipelines.

How to use this API directory

  1. Browse the curated list of APIs below.
  2. Click any API to visit its documentation.
  3. Check the Auth column to understand what credentials you need.

Whether you are building a language learning app or a content enrichment tool, this free curated API directory saves you hours of research.