A simple and free API for Bing Translator and Microsoft Translator for Node.js.

npm install bing-translate-api 

Added since v4.0.0. More stable and powerful. Both free service and paid service are supported. Feel free to give it a try!

Read the README for more details.

From auto-detected language to English:

const { translate } = require('bing-translate-api'); translate('你好', null, 'en').then(res => { console.log(res.translation); }).catch(err => { console.error(err); });

Translation result

{ // original text "text": "你好", // user-specified language code "userLang": "auto-detect", // translated text "translation": "Hello", // `correctedText` is returned only when `correct` is set as `true` // supported since v1.1.0 "correctedText": "", // detected language "language": { // language code of translated text "to": "en", // detected language code of original text "from": "zh-Hans", // score of language detection // supported since v1.1.0 // (NOTICE: This field may not be provided at present) "score": 1 }, // feminine translation text (Only be returned when the translation result is gender-debiased) // supported since v4.1.0 "feminineTranslation": undefined, // masculine translation text (Only be returned when the translation result is gender-debiased) // supported since v4.1.0 "masculineTranslation": undefined }

Type: string

The text to be translated, can't be blank. The maximum text length is 1000.

NOTE:

1. The maximum text length is up to 5000 characters only in China.
2. In EPT mode (since v3.0.0), the maximum text length is currently 3000.

Type: string Default: auto-detect

The language code of source text.

MUST be auto-detect or one of the codes/names (not case sensitive) contained in lang.json

NOTE: The EPT mode (since v3.0.0) only supports the languages contained in src/config.json#eptLangs. Any other language will fall back to the legacy mode, in which a 429 (Too Many Requests) error often occurs.

Type: string Default: en

The language in which the text should be translated.

MUST be one of the codes/names (not case sensitive) contained in lang.json.

NOTE: The EPT mode (since v3.0.0) only supports the languages contained in src/config.json#eptLangs. Any other language will fall back to the legacy mode, in which a 429 (Too Many Requests) error often occurs.

Type: boolean Default: false Since: v1.1.0

Whether to correct the input text.

Note that:

1. There is currently a limit of 50 characters for correction service.
2. Only the languages in the list are supported to be corrected.

Type: boolean Default: false

Whether the translation result contains raw response from Bing API.

Type: string

The header value of user-agent used in API requests.

Refer to src/config.json#userAgent for the default user agent.

Type: Got['Agents'] Default: undefined Since: v2.4.0

Set agents of got for proxy.

MIT © 2021-2025 plainheart.

Great thanks to Bing Translator for providing such an excellent translation service.