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An open-source Discord extension that translates messages using your own translation API key, built privacy-first and developer-friendly. Really for technically comfortable users willing to set up their own API key.
Watch out · Requires bringing and configuring your own API key to work.
Data stays with youOpen source
What to know▼
How it works
A Discord extension that translates messages using your own translation API key.
What's different
Open source and privacy-first — translation runs through your own API key rather than a shared third-party service.
Best for
Technically comfortable Discord users willing to set up their own translation API key.
Watch out
Requires bringing and configuring your own API key to work.
We check every product on this page once a day and record whether it still answers.
Generates bilingual subtitles for mixed-language (Japanese/Korean/Chinese-English) video without uploading the full video file, for creators who don't want their video leaving their device.
Data stays with youCan export my data
What to know▼
How it works
Audio extracted locally in-browser, only ~30MB audio sent to servers, deleted after processing
What's different
Handles code-switching and loanwords/technical terms accurately
We check every product on this page once a day and record whether it still answers.
A macOS menu-bar app that translates on-screen text and system audio in real time using on-device OCR and local speech recognition, for videos, meetings, or games.
Works offlineData stays with you
What to know▼
How it works
Lets you drag-select a screen area for an on-device OCR translation overlay, or capture system audio for live, locally-recognized speech translation, supporting 15+ languages.
Best for
Mac users who want instant translation of on-screen content or audio without switching windows.
We check every product on this page once a day and record whether it still answers.
A privacy-first collection of 21+ free browser calculators and converters offered in 8 languages.
Watch out · Available in 8 languages; also includes 16 in-depth tech reviews with comparison tables.
FreeNo sign-upData stays with you
What to know▼
How it works
21+ browser tools — BMI calculator, currency converter with live rates, password generator, loan calculator, unit converter, and more — with all calculations happening on-device.
Pricing
Free forever, no sign-up.
Watch out
Available in 8 languages; also includes 16 in-depth tech reviews with comparison tables.
We check every product on this page once a day and record whether it still answers.
Extracts text via OCR from scanned documents, then lets AI summarize them, flag contract risks, and translate into 51 languages — all on your Android phone.
FreeData stays with youNo subscription
What to know▼
How it works
Scans documents on an Android phone, extracts text via OCR (Google ML Kit), and lets AI summarize them, extract key facts, flag contract risks, generate to-do lists, chat with the document, or translate into 51 languages.
What's different
Goes beyond producing a plain PDF — the AI layer analyzes and translates the scanned content directly on the device.
Pricing
Scanning and OCR are free for everyone; deeper AI features (summaries, contract-risk analysis, translation) are part of a Premium tier billed without a subscription.
Best for
Android users, including freelancers and students, who want to digitize and understand documents like invoices, contracts and notes.
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Select text in any Windows app, press Alt+Z, and get it translated using local AI models — nothing leaves your device. No subscription; 30-day free trial.
Works offlineData stays with youNo subscription
What to know▼
How it works
Select text in any Windows app and press Alt+Z to have it translated locally and pasted back automatically.
What's different
Runs entirely offline using local AI models, so text never leaves the device.
Pricing
No subscriptions; includes a 30-day free trial.
Best for
Windows users who want in-place translation without switching apps or sending text to the cloud.
We check every product on this page once a day and record whether it still answers.
A native Mac app that translates your voice in real time during Zoom or Meet calls, entirely on-device across six languages, for a one-time purchase with no subscription.
Watch out · Limited to six supported languages and requires Apple Silicon for the on-device processing.
Works offlineData stays with youPay once
What to know▼
How it works
Translates your voice in real time during calls: you speak in your language and the other person hears a natural voice in theirs, with a virtual microphone that plugs into Zoom, Google Meet and Teams.
What's different
Runs 100% on-device on Apple Silicon, so voice never leaves the Mac; supports Spanish, English, German, Italian, French and Portuguese.
Pricing
One-time purchase, no subscription.
Best for
People in international meetings who need real-time spoken translation across the six supported languages.
Watch out
Limited to six supported languages and requires Apple Silicon for the on-device processing.
