AI Translator

About the Free AI Translator

The AI Translator converts English text into Spanish using the MarianMT opus-mt-en-es model running directly in your browser through Transformers.js. Type or paste a paragraph and get a natural machine translation instantly — without any text being uploaded to a server.

Key Features

• In-Browser AI: The translation model runs locally via WebAssembly — your text stays on your device.
• Private Translation: No API keys, no third-party translation services, nothing sent over the network.
• One-Time Model Download: The MarianMT model (~100 MB, quantized) downloads once on first use, then the browser cache makes repeat translations instant.
• Real Progress Bar: Per-file download tracking shows exactly how the model load is progressing.
• Copy & Export: One-click copy or download the translation as a .txt file.
• Swap Direction: Move the current translation back into the input box for further editing.

Great for Writing, Study, and Quick Lookups

Translate short messages, product blurbs, or study notes from English to Spanish on the fly. Since it runs locally, it is a great choice for sensitive drafts and for times when you simply want a translation without signing up for a service.

Pro Tips

• Best results come from clear, well-punctuated sentences rather than very long documents.
• If a word is untranslated, it usually means a proper noun — add context and try again.
• The first translation on a device takes longer while the model downloads; follow-up translations are fast.
• Use the Swap direction button to pull a translation back into the editor for minor edits.

How It Works

1. Type or paste English text into the box (up to 4,000 characters).
2. Click Translate to Spanish; the model loads once, then translates.
3. Review the result, copy it, or download it as a text file.