Zephyr Translate
Windows Desktop AI Translation — Long Documents, Consistent Terminology, Full Privacy
Overview
Zephyr Translate is a Windows desktop app for professionals who translate long documents — books, contracts, research papers, technical manuals — and need more than a paste-a-paragraph web tool.
It runs locally on your machine (built with Tauri). Your documents, translations, and terminology glossaries are stored only on your device, and the app calls AI models directly with your own API key (BYOK). No cloud relay, no account required, absolute privacy.
Key Features
- Long-Document Translation — translate entire books or contracts in one workflow, segment by segment
- Terminology Consistency — custom glossaries enforced across the whole document, no drift
- Progress & Resume — per-segment persistence; resumes from the last finished segment after interruption
- Bilingual Review — side-by-side original/translation aligned view
- Batch Queue — multiple documents queued, multiple target languages
- Multi-Format Export — Markdown, DOCX, bilingual comparison, and glossary note exports
- Polish Side Panel — select any translated segment to rewrite or ask follow-up questions
Pricing
Freemium by design — three tiers covering occasional use to professional workflows: Free (forever, no registration), Pro Subscription (monthly or yearly), and Lifetime License (one-time payment). Upgrade only when you need the pro workflow.
See full pricing & subscribe →Who It's For
Teachers, researchers, and professionals in finance, law, and industry who work with long, terminology-heavy documents — and who care about where their data goes. If consistency and privacy matter more than a quick copy-paste, Zephyr Translate is built for you.
Questions? orders@zephyrdn.com