🔒 100% Offline — Your Files Never Leave Your Computer

English Subtitles for
Any JAV

Generate English subtitles for censored and uncensored Japanese videos. No fan-subs needed. No cloud uploads. Everything runs on your machine — no one knows what you're watching.

Buy Now — $25 One-time payment · Windows • Linux • macOS soon

See It in Action

JAVSubs settings screen showing output directory configuration and GPU acceleration options for faster Japanese subtitle generation
Configure output directory and GPU acceleration
JAVSubs file selection interface — drag and drop Japanese video files in MP4, MKV, AVI and other formats
Drop your video files — MP4, MKV, AVI and more
JAVSubs processing a Japanese video — AI transcribing and translating audio to English subtitles locally
AI transcribes and translates — 100% locally on your machine

Three Steps. That's It.

📂
1

Select Video

Pick any Japanese video from your computer. MP4, MKV, AVI, WebM — all formats supported.

→
⚙️
2

AI Does the Work

Whisper transcribes the Japanese audio. A specialized model translates it to English.

→
✅
3

Get Subtitles

Timed .srt file ready for VLC, MPC, mpv — or burn them directly into the video.

No More Searching for Subs That Don't Exist

🚫

No Publisher Subs

Unlike anime or J-dramas, JAV never comes with official English subtitles. You're on your own.

🔍

Fan-Subs Are Rare

Maybe 1% of titles have fan-made subs — and finding them is a gamble. Most content has nothing.

🤖

Existing AI Subs Are Bad

The few AI-generated subs out there are inaccurate, poorly timed, and often unreadable.

✅

JAVSubs Fixes This

Generate accurate, timed English subtitles for any title — on demand, on your machine, in minutes.

💡 Also works with anime, J-dramas, Japanese movies, interviews — any Japanese video content.

Your Videos Stay on Your Computer. Period.

Other services make you upload your files to their servers. Think about that for a second. JAVSubs runs 100% locally — no uploads, no accounts, no trace.

JAVSubs Cloud Services
Where processing happens ✓ Your computer ✗ Their servers
Who sees your files ✓ Only you ✗ Unknown
Works offline ✓ Yes ✗ No
Data collection ✓ None ✗ Analytics & logs
Account required ✓ No ✗ Yes (with email)
🔌 Don't believe us? Disconnect your internet and it still works perfectly.

What You Get

✓
Accurate Japanese speech recognition

Powered by OpenAI's Whisper large-v3 — handles dialogue clearly even with background noise and music

✓
Natural English translation

Specialized Japanese→English AI model trained for natural, readable subtitles — not robotic machine translation

✓
Burn subtitles into video

Optionally hardcode subtitles directly into your video file with one click — no extra software needed

✓
Batch processing

Queue up multiple videos and let it run overnight. Come back to a folder of subtitled content.

✓
GPU acceleration

NVIDIA, AMD, or Intel GPU with 10GB+ VRAM? Process a 2-hour video in ~8 minutes via Vulkan. CPU-only works too, just takes longer.

✓
All video formats

MP4, MKV, AVI, WMV, MOV, WebM — drop any video file and it just works

What Users Are Saying

★★★★★

"I've been looking for something like this for years. The subtitles are surprisingly accurate and the whole thing runs without internet. Exactly what I needed."

— Alex R.
★★★★★

"Setup took less than 5 minutes. Dropped a video in, came back 10 minutes later and had perfect subs. The GPU acceleration on my RTX 3080 is insanely fast."

— @subtitlefan92
★★★★★

"The privacy aspect sold me. No uploads, no accounts, everything stays local. The translation quality is way better than the random AI subs floating around online."

— Marcus T.
★★★★★

"Batch processing is a game changer. I queued up a dozen videos before bed and woke up to all of them subtitled. Worth every penny."

— @nightowl_dev

One Price. Yours Forever.

🛡️ 30-Day Money-Back Guarantee
$25

One-time payment. Lifetime license. Not a subscription.

  • ✓ Unlimited videos — no caps, no limits
  • ✓ All features included
  • ✓ Windows & Linux (macOS coming soon)
  • ✓ Lifetime license + free updates for 1 year
💳 Buy with Card
🛡️ 30-Day Money-Back Guarantee 🔒 Secure Payment via Stripe & Bitcoin ⚡ Instant Download

Common Questions

How good are the subtitles?

Very good for dialogue and conversation. The translation model is specifically trained on Japanese→English and produces natural, readable text. It handles casual speech, slang, and context well. It won't catch every poetic nuance a human translator would, but it's easily good enough to follow along and enjoy.

How long does processing take?

With a NVIDIA GPU — 8GB+ free VRAM: ~5-10 minutes for a 2-hour video. Without a NVIDIA GPU or CPU only: ~20-60 minutes depending on your hardware. You can queue multiple videos and walk away.

Is it really 100% offline?

Yes. After the one-time setup (downloading AI models), everything runs locally. You can disconnect your internet and it works exactly the same. Zero network calls during processing.

What if it doesn't work for me?

30-day money-back guarantee, no questions asked. Email support@javsubs.app and you'll get a full refund.

What are the system requirements?

Minimum: Windows or Linux, 8 GB free RAM, 15 GB free disk space. No Python or technical setup required — just install and run.
Recommended: NVIDIA GPU with 10GB+ VRAM for 3-5x faster processing via Vulkan and Cuda.

Why not just find fan-subs?

For JAV, fan-subs barely exist. Maybe 1% of titles have them, and quality varies wildly. JAVSubs generates subtitles for any title, on demand — no searching forums, no dead links, no waiting for someone else to translate it.

What if my computer is slow?

It'll still work — just takes longer. On CPU-only, expect about 45-90 minutes per 2-hour video. Queue your videos, let it run in the background, and come back later. Any NVIDIA GPU with 10GB+ VRAM speeds things up 3-5x.

Does it work with other Japanese content?

Yes — anime, J-dramas, movies, interviews, variety shows. Anything with Japanese audio. But honestly, those usually have fan-subs or official subs. JAVSubs is most useful where no subs exist at all.

From the Blog

JAVSubs Is Now Available

JAVSubs is officially live. AI-powered subtitle generator that runs 100% on your computer. Available now for Windows and Linux.

February 2026 · 4 min read

How to Watch JAV with English Subtitles

Every method to get English subtitles for JAV — finding fan-subs, cloud services, and AI-powered local generation.

February 2026 · 9 min read
View all posts →

Stop Guessing. Start Understanding.

AI-powered subtitles for any Japanese video. Private. Offline. Yours forever.

Buy Now — $25
🛡️ 30-Day Money-Back Guarantee