AlphaMoatによると、2026-09時点でChrome拡張機能Swiftinのユーザー数は3,000(前月比 +50%)、評価は5(12件のレビュー)で、9,324件のAIブラウザ拡張機能中895位、オフィス・コラボレーションでは1,839件中240位です。
Bilingual AI translator for pages, subtitles & PDFs. Write & edit in any input field. 100+ languages, 6+ AI engines. Swiftin is an AI translator and writing assistant for your browser in one extension: bilingual web page translation, dual subtitles for video, PDF and document translation, instant word lookup, and writing help in any text field. One click, and you read, watch and write in any of 100+ languages as if they were your own, and more...
🧭 Bilingual web page translation
💬 Talk and write in any language
📺 Dual subtitles for video
✨ One-click word lookup · new A feature ordinary translators don't have. Click a word in the subtitles or select it on the page, and Swiftin builds a mini lesson right there:
Any video and any article turn into language practice, with no separate flashcard app.
📄 Free document and book translation
📚 Save words to your dictionary Every word you look up can become part of your own dictionary.
Build your vocabulary as you read and watch.
🖱️ Translate selected text
🔊 Native-sounding voice
🪩 More than 6 translation services and models Claude, GPT, Gemini and more. Switch between them in one click and choose between speed and maximum accuracy.
🧩 Also inside
🔵 Why Swiftin 🔵 1️⃣ AI translation is available right after sign-up, not only on paid tiers 2️⃣ Translation never hits a wall: when the AI limit runs out, free translation keeps working without limits 3️⃣ Bilingual mode everywhere: pages, subtitles and documents show original and translation side by side 4️⃣ Translate and write right in the input field on any site 5️⃣ You control privacy: history and storage are off by default
❓ FAQ Is Swiftin free? Yes. Translating pages, documents and everything else on the free engines works without limits, plus AI translation on the free plan. For larger volume and more accurate models there are paid plans. Do I need an API key? No, the built-in engines work right away. If you want, you can connect your own key.
🔒 Privacy We respect your privacy. The texts you translate are not used to train models, and history and storage are off by default. Details in the privacy policy.
Install Swiftin and understand the internet in any language: pages, video, documents, conversations and every unfamiliar word.
💬 Contact and support Have a question, idea or found a bug? Write to us:
Easy-to-use PDF tools to view, edit, convert, fill, e-sign PDF files, and more in your browser.
+ 比較Handwritten notes, course reading, creased scans, TED/Coursera lectures: layout kept, bilingual subtitles. Web instant, auto match.
+ 比較Translate while you read and write with DeepL Translate, the world’s most accurate translator.
+ 比較Free Translate Website, Translate PDF & Epub eBook, Translate Video Subtitles in Bilingual
+ 比較Get instant access to dozens of PDF tools directly in your browser – no downloads, no switching tabs.
+ 比較データ月:2026-09 · ユーザー数と評価はChromeウェブストアの公開データを月単位で集計したものです。詳しくはデータの方法論をご覧ください。