SwiftIn — AI translator — SwiftIn

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
• Original and translation side by side, paragraph by paragraph, for easy bilingual reading
• Or fully replace the original with the translation
• Works great where you read every day: news, social media, forums (Reddit, GitHub and more), blogs, documentation, research papers and webmail
• Pick the translation model for the task

💬 Talk and write in any language
• Translate right inside the input field: type in your own language, send in theirs
• Works in chats and messengers, as well as social media, email and any input field
• Improve the wording, fix spelling and grammar, change the tone from formal to friendly
• Rephrase, simplify, shorten or expand the text

📺 Dual subtitles for video
• Two subtitle tracks at once: original and translation over the player
• Support for YouTube, Coursera and Netflix
• Choose the source track and subtitle language
• Download subtitles as an SRT or plain-text file
• Neural translation, natural and context-aware

✨ 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:
• Meaning in context, not a dry dictionary entry
• Usage examples, synonyms and antonyms
• Part of speech and difficulty level
• Pronunciation read aloud
Any video and any article turn into language practice, with no separate flashcard app.

📄 Free document and book translation
• PDF, EPUB, Word, TXT, presentations, spreadsheets and subtitle files
• Document translation on the free engines is available at no cost, no subscription
• Original formatting and layout are preserved
• Articles, manuals, contracts, e-books and study materials

📚 Save words to your dictionary
Every word you look up can become part of your own dictionary.
• Tap a word in the subtitles or selected text, open its card, and save it with the star
• Browse all your saved words and phrases in one place
• Filter by language, part of speech and difficulty level
• Optional cloud sync keeps your dictionary together across your devices
Build your vocabulary as you read and watch.

🖱 Translate selected text
• Select a word or phrase for instant translation
• An explanation in the context of the sentence, not just a dry definition
• Read the original and the translation aloud

🔊 Native-sounding voice
• Natural neural speech: it sounds like a real native speaker, not a robot
• Hear the correct pronunciation of words, phrases and whole paragraphs
• Voice works in the word card and on selected text, for both original and translation
• 70+ languages supported

🪩 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
• 100+ languages, switch in one click
• Optional translation history, enabled in settings
• Privacy by default: your texts are not used to train models

🔵 Why Swiftin 🔵
1⃣ AI translation is available right after sign-up, not only on paid tiers
2⃣ Translation never hits a wall: when the AI limit runs out, free translation keeps working without limits
3⃣ Bilingual mode everywhere: pages, subtitles and documents show original and translation side by side
4⃣ Translate and write right in the input field on any site
5⃣ 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:
• Discord: https://discord.com/invite/AbeUVmQrXJ
• Telegram: https://t.me/+aLldOVKVfTM5YTli
• E-mail: velorislab@gmail.com