SubFlow translates your YouTube titles, descriptions and subtitles into 31 languages and publishes them to your channel — one click, right from your browser.
What it does
Spanish, Japanese, Korean, Arabic, French, German and 25 more — titles, descriptions and subtitles, processed in a single pass.
Published as native YouTube caption tracks your viewers can switch on — indexed by search in every region.
Runs are idempotent: SubFlow always translates from your original title and source track, and overwrites old translations instead of stacking duplicates.
Changed your mind about some languages? Delete their subtitle tracks and localized titles in one pass with the new Delete mode.
Cancel a running job anytime and keep what's done. Closed the panel mid-run? Reopen it and the progress picks right back up.
Google OAuth with PKCE — no passwords, tokens stay in your browser, and your content never touches a third-party server.
How it works
Add the extension from the Chrome Web Store. No signup, no account, no credit card.
Authorize with Google OAuth. Multiple channels and Brand Accounts supported.
Click the SubFlow icon on any of your YouTube videos — the URL fills itself in.
Watch live progress as titles and subtitles roll out to all 31 languages. Cancel anytime.
FAQ
Yes — you get 3 free runs every day, each covering all 31 languages of one video. That's enough to localize a daily upload for free.
Nothing bad. SubFlow always translates from your original title and original subtitle track — never from a previous translation — and replaces old translated tracks instead of duplicating them.
Your original title, description and captions stay untouched. SubFlow only adds localized titles/descriptions and new subtitle tracks — all visible and manageable in YouTube Studio.
SubFlow uses Google's official OAuth with PKCE — it never sees your password, tokens live only in your browser, and access is revoked the moment you remove a channel or uninstall.
Free to use. No server. Just install and start.
Add SubFlow to Chrome