Full overview of features, technical capabilities and how VidLocalizer works
VidLocalizer is more than a translator — it's a complete YouTube content localization system.
The app extracts existing subtitles or generates new ones from the audio track, then translates them with precise timing preserved. Supports SRT, VTT, and SBV formats. Finished subtitles are automatically uploaded to YouTube Studio.
Your video title is the #1 SEO element on YouTube. The app translates titles around actual search queries in each country — not word-for-word — ensuring organic growth from multiple regions.
Full localization of video descriptions: text translation, keyword adaptation for regional search queries, preservation of structure and links. The app optimizes each description independently per language.
Select multiple videos or an entire playlist and kick off translation with one click. The app processes everything in parallel — translate 10 videos into 5 languages simultaneously.
After translation the app publishes all results to YouTube Studio automatically: uploads subtitles, updates the title and description for every language. No need to open Studio manually.
Translations are produced by modern language models that understand video context. Results sound natural to native speakers — professional localization, not machine gibberish.
English, German, French, Spanish, Portuguese, Japanese, Chinese, Hindi, Arabic and more. The full language list is available inside the app.
The built-in editor lets you review and refine any translation before publishing. Edit subtitles line by line or update the title and description as a whole.
VidLocalizer is a desktop app for Windows and macOS. Here's how it works, step by step.
Secure connection to YouTube via OAuth 2.0. No passwords stored — only a limited-scope access token.
The app fetches your videos from the YouTube API and displays them with thumbnails in a clean interface.
Check the videos you want, pick target languages. Multiple selections supported.
The app extracts subtitles, titles and descriptions, sends them to the AI model, and receives high-quality translations.
Finished translations are automatically pushed to YouTube Studio via the API.
Translations are adapted to real YouTube search queries in each country — not just literal word-for-word output.
Authentication via official Google OAuth. The app never stores your password and operates strictly within YouTube API Terms of Service.
No need to understand subtitle formats, APIs or file types. Everything runs from an intuitive desktop app.
Channels that add localization see an average 280% increase in views. Attract viewers from brand-new countries.