Type, select text, or grab a screenshot. TransOne translates instantly with your choice of engine, and saves every word you look up so you can review it until it sticks.
No main window, no Dock icon. TransOne lives quietly in your menu bar and is one shortcut away.
Type or paste in the translation window, select text in any app, capture a screen region to translate, or OCR text straight out of an image. Each has its own global keyboard shortcut, and no extra permissions are needed to get started.
Pick from 27 translation engines: traditional ones like Apple’s on-device translator, DeepL, Google, Tencent and Baidu, plus AI models like OpenAI, Claude and Gemini, and reach local or your own services through Ollama, LM Studio or the custom API.
Draw a box anywhere on screen and TransOne translates the text inside it, right where you’re working. Handy for apps, games and images you can’t select. Save the captured region as a PNG, too.
Select text in any app and press ⌥W. Translate it, polish your writing, summarize a long read, hear it aloud or copy it, from a small bar right beside your selection. Every action can have its own global shortcut, too.
Every word you look up lands in your Vocabulary notebook. Review it with flashcards timed to your memory, watch your progress grow, and export to Anki or CSV. Every translation is kept in a searchable history, too.
Built in SwiftUI for macOS, using only Apple system frameworks. Light on resources, quick to launch, launches at login, and speaks 13 languages.
Real screenshots from the app. A quiet window, your engines, and every translation kept close.
TransOne bundles the everyday language tools you’d otherwise juggle across apps: recognition, speech, pronunciation, a dictionary, an encyclopedia and AI writing help, each with its own choice of engines.
Lift text out of any image or screen region. On-device with Apple’s Vision, or cloud engines like Google, Baidu, Tencent, Volcano Engine and Youdao for tougher scans and handwriting.
Hear how it sounds. Read the source or the translation aloud with Apple’s built-in voices, or natural cloud voices from OpenAI, Google, Microsoft, Tencent and Volcano Engine.
Go beyond a flat translation. Look words up for definitions, parts of speech and examples, from your Mac’s own dictionaries, Merriam-Webster, Youdao, Wiktionary, Free Dictionary, the offline ECDICT, or an AI model.
Get the bigger picture. Pull richer context on names, places and terms from Wikipedia, Wikidata, Moegirl or Baidu Baike, right next to your translation.
Say it right. TransOne shows the phonetic spelling next to a word (IPA for English, pinyin for Chinese), so you can read it aloud with confidence, then play it back.
Let AI help with the words around you. Polish your own writing in place without changing its language, or boil a long read down to one sentence, a paragraph or key points.
From a private on-device model to the best cloud APIs. TransOne talks to each engine directly with your own keys, with no relay server in between.
Apple (on-device)
DeepL
Google
Microsoft
Tencent
Baidu
Youdao
Alibaba
Volcano Engine
Amazon
OpenAI
Claude
Gemini
DeepSeek
Azure OpenAI
Kimi
Doubao
Qwen
ERNIE
Hunyuan
Groq
OpenRouter
302.AI
AiHubMix
Ollama
LM StudioNo account, no backend, nothing collected. Your text and your keys stay yours.
Text goes straight from your Mac to the engine you chose. TransOne has no backend and collects nothing, so there’s no account to create.
API keys, tokens and secrets are stored in the macOS Keychain, never in plain files, never sent anywhere except the engine they belong to.
Always runs in the App Sandbox and uses only Apple system frameworks. No third-party SDKs, no analytics, no surprises.
Prefer nothing to leave your Mac? Use Apple’s on-device translator or a local model via Ollama or LM Studio, and your text is translated without ever touching the cloud.
