Available

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 — the free tier is fully usable without registration. Upgrade only when you need the pro workflow.

Free

$0 No registration required

Single-document translation
Basic glossary (up to 50 terms)
Read-only bilingual view
Markdown export
BYOK — connect your own API key

Start Free →

Pro Subscription

$9/mo Billed monthly. Cancel anytime. Save 54% — 2 months free

Monthly · Launching soon

Everything in Free
Batch translation queue
Industry terminology packs
Unlimited glossary (import/export)
Pro exports — DOCX, bilingual, glossary notes
Polish side panel

Lifetime License

$99 Early-bird price, limited time

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

Lifetime · Launching soon

🔑 BYOK — Bring Your Own Key: Works with OpenAI, DeepSeek, Qwen, or custom providers. Your API key is stored locally and never leaves your machine. No middleman server ever sees your documents.

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