DualView Translator vs Shinkansen Web Translator

DualView Translator is a Safari translation extension that displays the original text and translation side by side. Since the original text remains visible even after translation, you can read foreign-language articles and documents naturally while checking the context. ■ Key Features ・Dual-view display — Translations appear directly below the original text ・8 translation modes — Select-and-translate, full-page translation, element-select translation & summary, and more ・Automatic Translation Rules — Automatically translate specific sites based on URL patterns. Narrow down target elements using CSS selectors ・Translation Reset — Reset individual elements with the × button, or reset all at once ・Two Translation Engines — Google Translate (free) and DeepL (high quality) ・AI Summary Feature — Summarize translation results into 3–5 lines using Claude / Gemini ・Tabbed Pop-up — Clean UI that separates translation operations from settings ・UI Support for 11 Languages — Japanese, English, Chinese, Korean, French, German, Spanish, Portuguese, Russian, Arabic ・Dark / Light Theme — Automatically follows OS settings ■ Translation Modes 1. Select Translation — Simply select text to display the translation panel 2. Full Page Translation — Translate entire articles or documents in dual-view mode 3. Full-Page Translation & Summary — Displays an AI-generated summary in addition to the translation 4. Element Selection Translation — Click on specific elements on the page to translate them 5. Element Selection Translation & Summary — Click on an element to translate it and view an AI summary 6. Right-Click Translation (macOS only) — Select text, then right-click to translate instantly 7. Element Translation (macOS only) — Translate by block with a right-click 8. Element Translation & Summary (macOS only) — Translate and display an AI summary with a right-click ■ Translation Bar When you open a page in a foreign language, a translation bar automatically appears at the top of the screen. You can execute "Translate" or "Translate & Summary" with a single click. ■ Automatic Translation Rules Register frequently visited sites as rules, and automatic translation will run as soon as you open them. You can specify targets in detail using URL patterns and CSS selectors, and the tool includes an element picker feature that automatically generates selectors just by clicking on elements on the page. It also supports SPAs, dynamic content, webmail, and more. ■ About API Keys ・Google Translate: No API key required (default) ・DeepL: Set the API key obtained after free registration (Free up to 500,000 characters per month) ・Claude (Summary): Requires an Anthropic API key ・Gemini (Summary): Available using the free-tier API key from Google AI Studio API keys are stored only in the browser’s local storage and are never sent to our servers. Text to be translated is sent directly to the API of the selected engine; we do not receive or store it. ■ iOS Limitations Since iOS Safari does not support some parts of the Web Extension API (keyboard shortcuts, right-click menu), these features are automatically hidden. Page translation, selected text translation, area selection translation, and settings can all be accessed via pop-ups. ■ Privacy Please review our Privacy Policy for details. https://hirokatsuhibino.github.io/dualview-translator/privacy-policy.html

Shinkansen is a fast, smooth, privacy-first Safari translation extension for web pages and YouTube subtitles, built for iPhone and iPad. Three things make it different: • Watch the page start turning into your target language within one second of pressing translate (Instant Translation, Gemini engine) • Text is replaced in place — fonts, sizes, colors, and layout are preserved; links, bold, and italics survive untouched • You bring your own API key; every setting lives on your own device; your reading never touches a third-party server [Built for iPhone & iPad] • Three- or four-finger tap any web page to toggle translation (tap again to restore) — no keyboard needed • Hardware keyboard shortcuts when an external keyboard is attached • Hover translation with a trackpad or mouse: hold a modifier key and rest the cursor on a paragraph to translate just that one • First-launch onboarding walks you through your Gemini API key and a default translation method [Languages] Translate into 8 target languages. The extension UI is available in the same 8 languages — pick independently or follow your system language. [Features] • Three engines: Gemini (best quality, API key), Google Translate (free, no key), any OpenAI-compatible model • Single-language overlay / bilingual side-by-side modes — one-click toggle, with 4 visual treatments for the bilingual layout • Free Chinese variant conversion: built-in dictionaries, no API key, works offline; auto-convert on by default • YouTube subtitle translation: real-time replacement styled like native captions; bilingual option; live stream links supported • YouTube AI smart segmentation: auto-generated captions are re-segmented by AI for natural full sentences • Adjustable YouTube subtitle size, readable even in full screen • Custom translation shortcuts: bind a key to each of the three presets, recorded on the settings page • Auto-translate specific sites: add domains and they translate on load • Cross-tab continuity: opening a link from a translated page auto-translates the new tab with the same preset • Translation cache + live cost report: cached content is free next time; a notification shows token count and cost • Custom glossary with CSV import (two columns: source,translation) with room for hundreds of entries, blocked-word list, and on-page translation editing • Respects the page's do-not-translate markup: marked names and codes stay untouched and are never sent to the API; icon-font glyphs are never turned into text • Send to Instapaper: save the whole translated article to Instapaper in one click [Bring your own API key] Shinkansen doesn't sell translation as a service — you bring your own Google Gemini API key. Gemini's free tier makes everyday use typically free. Prefer no key? Google Translate works with no setup, and Chinese variant conversion runs offline. Setup steps are in the GitHub repo and the in-app onboarding. [Privacy] Shinkansen has no server, no telemetry, no analytics. Every setting lives only on your device: • Your API key is stored locally in Safari — never synced, never uploaded • Translation content goes directly from your browser to the endpoint of the engine you chose • Shinkansen never relays, caches, or logs translation content • The local cache lives on your device only; clearing browser data wipes it [First-install note] After installing, enable the extension in Safari and grant website access: Settings → Apps → Safari → Extensions → Shinkansen → turn on, set website access to Allow (The exact path varies slightly by iOS version.) [System requirements] • iOS 15 or later / iPadOS 15 or later • Universal — iPhone and iPad [Open source] Open source under Elastic License 2.0 on GitHub — view, learn from, modify, and use it yourself; you may not repackage it (or a modified version) as a hosted or managed service for third parties.