🌍 Translation Open source Privacy ★★★★★
Argos Translate
Fully offline OSS translation engine
Overview
Argos Translate uses OpenNMT locally—pip install, download language packs, translate with no network.
CLI, GUI, and library suitable for batch confidential document processing.
Foundation for self-hosted translation stacks when Google cloud is unacceptable.
Scores
Privacy 5/5
Ease of use 3/5
Features 2/5
Value 5/5
Google Translate — comparison
Zero cloud send vs Google Translate; much lower quality but maximum privacy and reliable offline use.
Pros
- ✓ Fully offline—no external send
- ✓ Free MIT open source
- ✓ Easy Python automation
- ✓ GUI for non-developers
Cons & caveats
- − Quality below Google/DeepL
- − Language packs require download (hundreds of MB)
- − Weak on jargon and context
- − Not for live conversation
Best for
- Confidential local document translation
- Python batch workflows
- Air-gapped environments
Not ideal for
- Highest translation quality
- Real-time conversation
- Camera translation
Specs
- Pricing
- Free — Completely free (MIT).
- Difficulty
- Moderate
- Data location
- Fully local processing.
- Platforms
- Windows · macOS · Linux
完全オフラインPython API無料GUI アプリあり
Migration from Google Translate
- 1 pip install argostranslate argospm
- 2 argospm install needed language pairs
- 3 Run translations via script or GUI
- 4 Stop using Google Translate for sensitive documents
Setup steps
- 1 pip install argostranslate argospm
- 2 argospm update && argospm install translate-en_ja (example pair)
- 3 Python: argostranslate.translate("Hello", "en", "ja")
- 4 Or download Argos Translate GUI application