Huì Yì

Huìyì is an AI-powered browser translation plugin that supports side-by-side webpage translation, word-by-word translation on selection, PDF and Word translation, webpage new word highlighting, and video subtitle translation, covering multiple languages.

AI Translator#Browser Extension#Contrastive Translation#Document Translation

Updated: 2026-10-26

What is Huì Yì?

Huiyi is an "AI-powered professional multilingual translation assistant". Officially, it supports functions such as side-by-side web page translation, word selection translation, PDF translation, Word translation, web page vocabulary highlighting, and video subtitle translation. Different from ordinary full-page translation plug-ins, it emphasizes the side-by-side (original text and translation on the same screen) reading experience, and also supports multiple scenarios such as PDF and videos. It is positioned as an immersive reading and learning tool.

Who is it for?

Tech and cross-border shopping users who often browse foreign websites and need side-by-side Chinese-English reading, reducing the need to switch tabs to look up words.
Students and researchers who download English thesis PDFs and wish to have segmental lossless translation while preserving the layout.
For self-learners and viewers who watch foreign-language videos and need subtitle translation to aid comprehension, it lowers the entry barrier.
For language learners who want to highlight new words for accumulation and learn while reading, forming a closed loop of learning.
Ordinary reading users who need a lightweight plugin compatible with multiple browsers.
Mobile learners who need to sync translation preferences across devices and switch seamlessly between mobile phones and desktops.

Key features

Web Bilingual Contrastive Translation

The official states that translation can be triggered by mouse hovering or word selection, with the original text and its translation displayed simultaneously to reduce reading barriers.

Word-by-word and Hover Translation

Supports word-by-word selection and hover-triggered translation, allowing you to translate paragraphs on demand instead of replacing the entire page, preserving the context.

PDF and Word Translation

The official states that it supports segment-by-segment lossless translation of PDFs and Word documents, facilitating the reading of papers and other documents.

Highlight New Words on Webpages

Highlights new words on webpages to assist with language learning and vocabulary building, allowing you to learn as you read.

Video Subtitle Translation

The official states that it supports video subtitle translation, helping users understand foreign language video content and enhance their viewing experience.

Multilingual Coverage

Supports mutual translation between multiple languages. According to the official, it can meet most daily and professional translation needs with a wide range of application scenarios.

How to use Huì Yì

1**Install the plugin and try it first**: The official version is available on app stores and for multiple browsers. Install the plugin first to verify the translation speed and accuracy.
2**Use side-by-side mode**: Prioritize side-by-side reading over full-page replacement when reading, facilitating comparative learning and verification of the original text.
3**Segment long PDFs**: Use segment-by-segment translation for large documents to avoid lag, truncation or loss caused by processing an overly long text in one go.
4**Authorization and Compliance**: When uploading documents or using video translation, please pay attention to the platform's data policies, and the scope of commercial use shall be subject to the official instructions.
5**Export and Share**: The translation results of long texts can be saved or exported for offline viewing and secondary organization.
6**Official rules may be adjusted**: Features, supported languages and prices are subject to change, please check the official website instructions again before use.