KISS Translator

fishjar/kiss-translator

Inserts translations under each paragraph of a web page for side-by-side bilingual reading, and also translates input boxes, subtitles and selected text. Works with DeepL, Google, OpenAI-compatible APIs or local Ollama.

Why pick itMinimal UI and customizable rules, available as both an extension and a userscript. An open-source alternative to Immersive Translate's paid features, with Traditional Chinese output.

Install

InstallSearch “KISS Translator” in the Chrome Web Store, Microsoft Edge Add-ons or Firefox Add-ons, or install the userscript

GitHub: fishjar/kiss-translator
Website: kiss-translator.rayjar.com
Stars: ★ 13k
License: GPL-3.0
Language: JavaScript
Last push: Oct 25, 2026
Category: Browser extensions

Good for

Insert translations under the original text on web pages, or show translations only
Translate input boxes and selected text, look up words and save vocabulary
Show bilingual YouTube subtitles with AI sentence segmentation
Translate PDF, EPUB, Markdown and image files (extension only)

Getting started

Search for "KISS Translator" in the Chrome, Edge or Firefox extension store, or install the userscript
Add a service under service settings with its API address, API key and model name, then test it
Enable the service for each scenario and press Alt+Q to translate a page

Before you install

The browser extension is recommended; newer features such as local AI and file translation are extension-only, and Safari is not supported yet.

Summarized by AI from the project docs; check the official docs before relying on it.

Similar tools

NanobrowserBrowser extensions · ★ 14.2k
Multiple AI agents operate web pages in your Chrome — comparing prices, filling forms, gathering data — using your own LLM API key.
ChatGPTBoxBrowser extensions · ★ 10.8k
Call AI from a floating window on any page: translate selections, summarize, show answers next to search results. Supports many APIs and web-app accounts.
Read Frog 陪讀蛙Browser extensions · ★ 10.2k
Uses an LLM for bilingual web page translation and explains words, phrases and grammar at your level, turning foreign-language browsing into language learning.
Page AssistBrowser extensions · ★ 8.3k
Chat with local models from Ollama, LM Studio and others in a browser sidebar, and ask questions about the current page or PDF.