Mono Translate Pro

Understand the video.
Not just the subtitles.

Context-aware subtitle translation for YouTube, powered by your own Gemini API key — with privacy, control and a cleaner viewing experience built in.

See how it works Read about privacy
Privacy by design

Your translation content is not sent to Mono.

Mono Translate Pro works as a local browser extension. When you request a translation, the required subtitle text is sent directly to Gemini using your own API key. Mono does not operate a translation server in between, and does not store your subtitles, translation history or Gemini API key on Mono servers.

No subtitle database No Mono translation server Your own Gemini API key Local-first settings
How Mono Translate Pro works

A direct path from video to better subtitles.

Mono reduces manual work: it reads available subtitles, groups enough surrounding context to improve meaning, sends the translation request through your Gemini API key, then displays the translated subtitles directly on the video.

YouTube videoAvailable subtitles are detected.
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Mono Translate ProContext is prepared locally.
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Your Gemini APITranslation is processed by Gemini.
Translated resultMono receives the translated text.
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Synced subtitlesDisplayed directly over your video.
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You stay in controlMove, resize, style, hide or show subtitles.
Getting started

Create your Gemini API key and start translating.

No developer experience is required. The setup is simply: create your Gemini API key, copy it, paste it into Mono Translate Pro, choose your language and translate.

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Mono Translate Pro — Setup Guide

Replace this placeholder with your YouTube tutorial embed.

Recommended tutorial: Install extension → Create Gemini API key → Paste key → Open YouTube → Turn Mono Subtitles ON → Translate.
Why buy Mono Translate Pro?

You are paying for the software experience — not translation quota.

Gemini is the translation engine. Mono Translate Pro is the product that turns that engine into a fast, contextual and visually integrated viewing workflow.

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Better context

Mono can group nearby subtitle segments so the AI has more context and can produce more natural, easier-to-understand translations than isolated line-by-line auto translation.

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Less manual work

No copying subtitles into another app, translating paragraph by paragraph, then switching back to the video. Mono automates the workflow and displays the result in place.

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A real viewing tool

Move subtitles, resize them in real time, turn Mono subtitles on or off, adjust visual presentation and keep the translation where you are actually watching.

Simple Pro access

One low monthly subscription.

Mono Translate Pro

About the cost of a cup of coffee.

Mono Translate Pro does not offer a free trial. Instead, it uses a very low monthly subscription. Once subscribed to Pro, you can use the full set of Mono Translate Pro features included in your plan.

  • ✓Full Pro feature access
  • ✓Use your own Gemini API key
  • ✓No translation quota sold by Mono
  • ✓Product updates and improvements while subscribed
Questions & answers

Everything important, explained clearly.

No. Mono Translate Pro does not offer a free trial. It is available through a low-cost monthly subscription — designed to be close to the cost of a cup of coffee. After subscribing to Pro, you can use all Pro features included in your plan.
No. Your Mono Translate Pro subscription pays for the software and its features. Gemini usage belongs to your own Google API account. Mono does not resell Gemini quota.
Mono is designed so your translation content is not stored on Mono translation servers. If local cache or preferences are used for performance or convenience, they remain on your device and should be removable from the extension settings.
Yes, when translation is requested, the subtitle text required for translation must be sent to Google Gemini so Gemini can process it. The important distinction is that it is sent using your own Gemini API connection and is not routed through a Mono translation server.
The intended architecture is local storage inside your browser or extension environment. Your API key is used to communicate with Gemini and is not intended to be uploaded to Mono servers.
Mono Translate Pro is designed for people who want more contextual translation and a better subtitle experience. It can prepare surrounding context for the AI, then display the translation in a customizable overlay directly on the video.
No. The setup can be completed in a few simple steps. Follow the tutorial on this page to create a Gemini API key, copy it and paste it into Mono Translate Pro.
Contact Mono support by email. Replace the placeholder support email on this website with your official support address before launch.

Software license & copyright

Mono Translate Pro is licensed software. Purchasing or subscribing gives you permission to use the software under the applicable license terms; it does not transfer ownership of the software, source code, brand, design or intellectual property. Redistribution, resale, unauthorized copying, modification for redistribution, or bypassing licensing mechanisms is not permitted unless expressly authorized in writing.

Need help?

If you encounter an issue, have a billing question or need help setting up your Gemini API key, contact Mono support.