Zephyr Translate
Windows desktop AI translation for long documents. Consistent terminology. Absolute privacy.
Free — $0
Start translating long documents immediately. The free tier is fully usable out of the box — no account, no email wall, no cloud relay.
- Single-document translation
- Basic glossary — up to 50 terms
- Read-only bilingual review view
- Markdown export
- BYOK — connect your own API key (OpenAI, DeepSeek, Qwen, custom)
Pro — Subscription
Unlock the full professional workflow. Subscribe monthly or yearly — license keys activate offline, the app never phones home.
- Batch translation queue — multiple documents, multiple languages
- Industry terminology packs (finance, academic, legal)
- Unlimited glossary with import/export
- Pro exports — DOCX, bilingual comparison, glossary notes
- Polish side panel — rewrite or ask follow-up on any segment
- Per-segment progress with resume-after-interrupt
Lifetime — Buy Once
Buy Zephyr Translate once and keep it forever. One-time payment, no subscription — your license key activates offline.
- All Pro features, one-time payment
- Locks in the Zephyr 1.x Pro feature set
- License key activates offline
- Early-bird upgrade path to future major versions
Why Zephyr Translate?
Long documents need more than a paste-a-paragraph web tool. Books, contracts, research papers — they have terms that must stay consistent from page one to the end.
🔒 BYOK Privacy
Your documents, translations, and API keys are stored only on your machine. The app calls AI models directly — no middleman server ever sees your data.
📚 Terminology Consistency
Custom glossaries are enforced across the entire document. The same term translates the same way on page 1 and page 400.
🖥️ Windows Desktop
Built with Tauri — installs in seconds, runs fast, and works offline. License keys activate locally; no runtime connectivity checks.
Questions? orders@zephyrdn.com