CopyTranslator is a free, open-source Mac utility that intercepts your clipboard and delivers an instant translation the moment you copy any foreign-language text — no browser tab switching, no manual pasting required.
What is CopyTranslator?
CopyTranslator is a clipboard-monitoring translation tool for macOS (and other platforms) that watches for copied text and immediately surfaces a translation in a compact overlay window. It sits in the background, silent until you hit ⌘C on a sentence you don't recognise, then delivers the rendered meaning in your chosen target language within a second or two.
The idea sounds simple, and that simplicity is exactly the point. Researchers reading PDFs, developers scanning foreign GitHub issues, or anyone ploughing through Japanese documentation will recognise the friction it removes: the constant alt-tab → paste → read → alt-tab loop that, over a two-hour session, quietly consumes twenty minutes of attention.
What does CopyTranslator do best?
CopyTranslator excels at zero-interrupt reading flow. Unlike DeepL's desktop app, which requires you to actively paste into its window, or Google Translate's web UI, which pulls you out of your current context entirely, CopyTranslator keeps you anchored in whatever document or page you were already reading.
- Listen mode — auto-translates every new clipboard entry without any extra keystroke.
- Focus mode — a slim, always-on-top strip that stays visible without obscuring your main content.
- Incremental copy — concatenates successive clipboard snippets so you can build up a multi-sentence paragraph from a source that won't let you select across line breaks (think some PDF viewers or terminal output).
- Multiple translation engine support, so you can swap from Google Translate to a different backend when quality on a specific language pair disappoints you.
I found incremental copy to be the sleeper feature. Academic PDFs with two-column layouts routinely break selections mid-sentence. CopyTranslator's ability to stitch those fragments together before translating saves a surprising amount of manual cleanup.
Is CopyTranslator free?
Yes — CopyTranslator is completely free to download and use. It is an open-source project maintained on GitHub under a permissive licence, with no paid tier, no subscription, and no feature gating. The only external cost is incidental: some translation backends (like the Google Cloud Translation API, if you supply your own key) may have usage limits or charges beyond a free quota, but CopyTranslator itself costs nothing.
Who should use CopyTranslator?
CopyTranslator is built for people who read a high volume of text in languages that aren't their own. It earns its place on the machine of:
- Researchers and academics regularly processing papers in German, Chinese, Japanese, or Spanish.
- Developers who follow international communities, read foreign-language Stack Overflow threads, or triage GitHub issues filed in non-English locales.
- Language learners who want to stay in an immersive reading environment and look up constructions without breaking their rhythm.
- Journalists and analysts monitoring multilingual sources or social feeds.
If you only occasionally need a word translated, the built-in macOS Look Up gesture (three-finger tap or Force Touch) may be all you need. CopyTranslator is the right tool when that occasional need becomes a steady drumbeat throughout your working day.
What are the best CopyTranslator alternatives?
The closest native competitor on macOS is DeepL for Mac — arguably a superior translation engine, with a polished interface and excellent European-language quality. Its limitation is workflow: you still paste manually. PopClip with a translation extension is another strong option and integrates tightly into macOS conventions, though it requires a licence and a plugin. Pockity and Translator for Safari are browser-scoped and won't help you outside the web. For pure clipboard monitoring plus translation in one lightweight package, CopyTranslator remains the most focused free choice on the Mac.
How does CopyTranslator compare to DeepL?
DeepL produces more nuanced translations, particularly for European language pairs, and its Mac app is more polished and Apple-native. If translation quality is your top priority and you are happy to dedicate a window to it, DeepL wins on output alone. CopyTranslator wins on friction reduction: it requires zero additional keystrokes after the copy, floats non-intrusively, and handles non-browser contexts (local PDFs, terminal sessions, native apps) equally well. In practice I keep both installed — DeepL for when I want to read a translation carefully and iterate, CopyTranslator for the hundred brief confirmations I need throughout a research session.
