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
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.
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? Yakovxia@gmail.com
Contact: Yakovxia@gmail.com