AI-Powered Translation

TransAI

AI Desktop Translation, Lightning Fast

Invoke with a global hotkey from anywhere. Supports text selection, clipboard, and manual input. Multi-model AI with automatic fallback for accurate, reliable results.

Available for Windows & macOS

CZL TransAI 产品主视觉

Powerful Features, Minimal UI

TransAI integrates AI translation seamlessly into your workflow.

Three Global Hotkeys

Selection / popup / inline-replace — three independent hotkeys, configurable or disabled individually.

3 Translation Modes

Text selection, clipboard auto-read, and inline replacement in any input box. Reading, writing, chat — all covered.

Multi-Model Auto Fallback

Multiple AI models on the server. If primary fails (rate-limit / outage), automatic switch to backup keeps translations flowing.

Team Sharing

Pro/Max users can create teams. Members share the owner's daily quota. One-time invite links keep things secure.

TTS Playback

One-click read-aloud for the translated text — perfect for pronunciation practice.

Local History & Cache

Last 500 entries kept locally; instant cache hits for repeated text. Searchable and clearable. TTS cache managed separately.

Multi-Device Safety

One account on multiple devices. Disable old devices remotely from your account panel — disabled devices cannot translate.

CDK Redeem

Redeem codes to extend subscription duration or grant standalone quota packs. Packs consume first; expiry auto-rolls forward.

Auto Updates

In-app incremental download, force-update support — always latest and secure.

划词翻译浮窗
划词翻译浮窗:选中文字后立即在鼠标附近弹出译文,支持 TTS 朗读与一键复制。
设置主窗口
设置主窗口:sidebar 布局,账户、订阅、小组、翻译配置、快捷键、通用、关于一目了然。

Built for Every Scenario

TransAI is more than a translator — it's your language companion for reading, writing, and collaboration.

Reading

Papers & Docs at a Glance

Selection translation turns English papers, API docs, and code comments into your native language instantly. Pair with TTS for listening practice.

Trade

Reply to Emails 3× Faster

Type your reply in your native language inside Outlook or webmail, hit the inline-replace hotkey, and it becomes English in place.

Learning

Listen, Speak, Read, Write

Selection + TTS + history together build your personal vocabulary list. Pro+ keeps history forever.

Teamwork

Shared Quota for Pro/Max Teams

Owner generates a one-time invite link; members join via deep link auto-launch. Owner can kick / disband / transfer ownership. Up to 10 members.

Flexible

Pro→Max Pro-Rated Upgrade

Upgrade is calculated by remaining days — no need to wait for renewal. Even Alipay one-time payment supports differential checkout.

Worry-Free

48-Hour No-Reason Refund

Full refund within 48 hours of first payment, one click in the app. Plan downgrades to Lite immediately. Transparent rules, handled by support.

小组共享额度面板
我的小组:组员一行一人显示头像 / 昵称 / 邮箱 / 用量;组长可生成一次性邀请链接、踢人、转让、解散。
输入框翻译演示
输入框翻译:在邮件 / 聊天软件中按下 Alt+Ctrl+T,原地把中文替换成英文。

Get Started in 3 Steps

From download to your first translation in under a minute.

01

Download & Install

Download the installer for your platform, double-click to install — the app lives in your system tray.

02

Sign In

Log in with your CZL Connect account. No extra registration needed.

03

Start Translating

Press the global hotkey, select text or paste content, and get instant AI translation.

完整使用流程演示

Simple, Transparent Pricing

Pick a plan that fits. All plans include core translation features. Stripe (card) or Alipay supported.

Lite (Free)

Perfect for light users

$0/forever

Daily quota: 50 / day

  • All core translation features
  • Multi-model auto fallback
  • 3 global hotkeys
  • TTS playback
  • 500 local history entries
Download Free
Most Popular

Pro

Recommended for individuals

$14/yr

Daily quota: 500 / day

  • Everything in Free
  • Create team
  • Invite up to 5 members
  • Pro-rated upgrade to Max
  • 48h full refund window
Upgrade Now

Max

For power users & teams

$125/yr

Daily quota: 5,000 / day

  • Everything in Pro
  • Bigger shared team quota
  • Up to 10 members
  • Priority support
Upgrade Now
  • 💳 Card (Stripe auto-renew) or 💴 Alipay (one-time payment, manual yearly renewal)
  • 💰 Pro→Max upgrade prorated by remaining days, no need to wait
  • 🎁 CDK redeem codes can extend duration or grant standalone quota packs

Frequently Asked Questions

Still have questions about features or billing? Here are answers. Anything else? Use "Contact Support" in the app.

How is the daily quota calculated?
Each translation consumes ⌈source-chars ÷ 1000⌉ counts. So up to 1000 chars = 1 count, 1001-2000 = 2, etc. Resets at 0:00 Beijing time (UTC+8). Standalone quota packs (from CDK) are consumed first; daily quota is only used when packs are empty.
Is 50 / day on Free enough for me?
Plenty for occasional word lookups and short sentences. If you read English articles or batch-translate emails daily, upgrade to Pro (500/day) or Max (5000/day). Quota counts characters — 500 ≈ 500K characters per day.
What's a "team" and how does it work?
Pro/Max users can create a team and share their daily quota with members (up to 10 incl. owner). Members consume the owner's quota first when they translate. Owner generates a one-time invite link in "My Team"; clicking the link auto-launches the desktop app and joins the team. Owner can kick members, disband the team, or transfer ownership.
Are invite links one-time?
Yes. Each link can be used by exactly one user, then expires immediately. Click "Regenerate Invite Link" to invite more people. This prevents leaked links from being abused.
How do I change or disable global hotkeys?
Settings → Shortcuts. Three configurable hotkeys: ① selection translate (popup), ② translation window (manual input), ③ inline replace (replaces text in current input box). Each has a Reset and Disable button. Disabled means the hotkey no longer triggers anything. Conflicts with system shortcuts are flagged in red.
Which OS are supported? M1/M2 Mac compatible?
Windows 10+ and macOS 12+. macOS supports Apple Silicon only (M1 / M2 / M3 / M4) — Intel x86_64 is not provided.
Switched computers — can I keep using my account?
Yes. One account supports up to 3 simultaneous devices. To prevent account abuse, you can remotely disable an old device from "My Devices" in your account panel. Disabled devices can't translate; logging in again re-enables them.
Card or Alipay — what's the difference?
Stripe Card auto-renews and charges automatically before expiry. Alipay is one-time — you renew manually each year. Both support upgrade (Pro→Max diff checkout) and refund (48h). Pick Alipay if you don't want auto-charge; pick Card if you want zero hassle.
Is translation reliable? What if a model goes down?
The server has multiple AI models with priority-based fallback. If primary is rate-limited or having issues, traffic switches to backup automatically — invisible to you. You can change the default model in Settings → Translation.
Is my translation history uploaded? Privacy?
History is stored only in a local SQLite database (last 500). We only log character counts on the server (for quota), never the source or translated text.
How do I refund? When will I receive it?
Settings → Subscription → Request Refund. Conditions: within 48h of payment, no prior refund this cycle, lifetime cap not reached. The plan downgrades to Lite immediately. Settlement: 5-10 business days for cards, 24-48 hours for Alipay.
What happens after Pro/Max expires?
Plan auto-downgrades to Lite (50/day). Local history, TTS cache, settings are all preserved. Renewing instantly restores Pro/Max.
Does it work with Office / Outlook / chat apps?
Yes. "Inline replace" is designed exactly for these: type in your native language, press hotkey (default Ctrl+Alt+Q), and TransAI replaces it with English in place. Some sandboxed webmail clients may not support inline replace — those fall back to popup translation.

Download and Get Started

Supports Windows 10+ and macOS 12+. Continuously updated.

v—

Continuously updated.

Current Version: v—·Release Notes