Test status
Beta Last checked:Behind Cloudflare checks, so automated tests could not open it. Manual testing in progress.
What the site is
SupJav (supjav.com) is a WordPress-based Japanese adult-video site. You choose a server on the title page, and the player frame is inserted after you click. Title addresses are a post number followed by .html, with an optional /en/, /zh/ or /ja/ prefix for the site's own language versions; the same number is used in every language.
Are subtitles available?
The site does not provide English subtitles to switch on. The extension generates them from the audio.
How to use the extension on this site
- Install the extension and sign in with your license key.
- Open the video page and start playing.
- Pick the subtitle language, then press the subtitle badge on the player.
- Open the title, click a server button and press play. The player frame only exists after that click.
- The title is recognised from the post number in the page address, since the address holds no product code.
- Switching servers keeps the same title; opening another post starts a new session.
- On a single post the adapter checks that the post number in the address matches the one the page declares in its own markup and canonical link. If they differ it returns nothing.
- The frame that holds the film comes from lk1.supremejav.com. Because the number is read from the main page address, subtitles stay tied to the post even though the frame has its own address.
- The language versions of the site share one number, so a title opened under /zh/ or /ja/ uses the same subtitle track as the English page.
Good to know
- Beta: SupJav is behind Cloudflare checks and our automated test could not open it on 2026-10-22. The adapter exists and is unit-tested; the project owner is testing it by hand.
- Pre-roll ads inside the player frame have not been observed yet, so ad handling there is unconfirmed.
- Only supjav.com is listed. A supjav.fun address appears on the site, but a title opened there returned not found when we looked, so it is not claimed. The version with www also returned an error.
- Server buttons carry other labels as well, but only the lk1.supremejav.com frame has been observed in the page code. Other servers may use different frame hosts that the adapter does not know yet.
Subtitle languages
Choose the target language in the extension: Vietnamese, Indonesian, Spanish and English are the main ones, and the translation API also supports Chinese, Korean, Thai, Portuguese, Japanese, Russian, French, German, Hindi, Arabic and Turkish.
FAQ
Why must I click a server first?
SupJav loads the player into the page only after you choose a server; the extension attaches when it appears.
Does it work on the language versions of the site?
The adapter handles the plain, /en, /zh and /ja address forms.
Is SupJav verified?
Not yet. It is marked beta until a real test shows subtitles.
Do I get new subtitles every time I change server?
No. The subtitles belong to the title, not the server, so switching servers keeps the same session. Only opening a different post starts a new one.
Why does the adapter not use a product code for SupJav?
The addresses contain only a post number and no studio code, so the post number is the only reliable identity. This also means the same film on another site does not share its subtitles with SupJav.
A Cloudflare check appears before the page. Is that a problem?
Complete the check as you normally would. The extension starts working once the real title page and its player have loaded.
Can I pick a language other than English?
Yes. Choose any target language the translation service offers, such as Vietnamese, Indonesian or Spanish, before or during playback.