Metadata Localizer

Localize your YouTube title & description into 10 languages — Chrome's built-in AI (no key) or your own AI key. Private.

Reach viewers in their own language — without machine-translation stiffness. Metadata Localizer rewrites your YouTube title and description into other languages. It is not a literal translation: it adapts your words into natural, search-friendly phrasing that native viewers would actually type and click. Then you copy each language and paste it into YouTube Studio's per-language fields. TWO WAYS TO RUN IT Easy mode — no key, nothing to sign up for. Uses Chrome's built-in AI, right on your device. Perfect for getting started. Your own AI key — bring a key from OpenAI, Anthropic or Google for the sharpest rewriting and all 10 languages. You pay that service directly, usually a fraction of a cent per video. Either way, this extension has no AI and no server of its own. Your text stays on your device and, in key mode, is sent only to the AI service you choose. We never see it. HOW IT WORKS Pick Easy mode (no key) or connect your own AI key. Paste your title and description. Pick your languages and click Localize. Each language appears in its own card, ready to copy. WHAT YOU GET (FREE) Localize into up to 2 languages Easy mode with Chrome's built-in AI — no key needed Copy each result with one click PRO (ONE-TIME PURCHASE, NO SUBSCRIPTION) All 10 languages Protected terms — keep your channel name, song titles and brands untranslated everywhere Copy every language at once Saved sets — keep each show's input and languages under a name BUILT FOR CREATORS WITH A GLOBAL AUDIENCE Music, faceless and podcast channels see the biggest lift from localized metadata. Ten language presets cover the audiences most valuable for discovery, across Europe, the Americas and Asia. PRIVATE BY DESIGN No developer server, no analytics, no tracking. The only network requests are the localization call to the AI service you configured (with your own key) and a one-time purchase check via ExtensionPay + Stripe. Not affiliated with YouTube, OpenAI, Anthropic, or Google.