How to watch Japanese Twitch streams with English subtitles (free, no install)
Published: 2026-09-16
Japanese Twitch has a lot going on: game streams, chatting streams, late-night talk, collabs. But while a stream is live there are no English subtitles, and translation extensions cannot help, because they translate captions that a video already has. A live stream has none.
This guide shows how to get live English subtitles on a Japanese Twitch stream, for free, in your browser, without installing anything. The streamer does not need to set anything up, so it works on any stream.
What you need
- Chrome or Microsoft Edge on a computer. Safari and Firefox do not work
- Not a phone or tablet. Mobile browsers cannot share tab audio
- Twitch open in the browser, not in a desktop app. The stream's sound has to be playing in a browser tab
- A one-time download of the speech recognition model. For Japanese, the Balanced setting is about 590MB; after the first time, it is loaded from your browser's storage
No account, no extension, no payment, and no time limit.
What gets subtitled, and what does not
LiveSub is a website. You share one browser tab's audio with it. It recognises the Japanese speech on your own computer, translates it with Chrome's built-in on-device translator, and shows the Japanese and the English as subtitles. Your audio is never uploaded anywhere.
Because it works from sound, only sound is translated:
- Chat is not translated. It is text, not audio
- Text on screen is not translated either: game menus, overlays, on-screen captions
- Anyone you can hear is subtitled: the streamer, guests on a call, and characters speaking in the game
Think of it as a tool for following what the streamer is saying.
Step by step
1. Check it works before the stream starts
Open https://livesubweb.com/?lang=en in Chrome. Under "Translate from / to", choose Japanese → English. This matters: Japanese uses a different recognition model, and if you leave it on English → Japanese you get garbled text instead of subtitles.
Then press "Try a sample". It plays a short built-in Japanese clip and shows subtitles without sharing any tab, and it gets the one-time download out of the way. Do this before the stream you actually want to watch goes live.
2. Choose a recognition setting
Under "Recognition setting", Balanced is the recommended starting point for Japanese. It keeps up with live speech and handles names reasonably well.
If your computer has a powerful GPU, Japanese-tuned is a model retrained on Japanese only, and it is noticeably more accurate, even with fast, casual speech. It is much heavier, and the first download is about 730MB. It only appears when your browser can use the GPU. You can switch settings while the stream is running.
3. Open the stream and share its tab
Open the Twitch stream in another tab. Back in LiveSub, press "Start (share a tab)". In Chrome's sharing dialog:
- Pick the "Chrome Tab" section at the top
- Choose the tab playing the stream
- Tick "Also share tab audio" at the bottom left
- Press Share
If you forget the audio checkbox, no sound reaches LiveSub and nothing appears. If no sound arrives for about 12 seconds, LiveSub tells you; press "Share again" and tick the box.
4. Read the subtitles
When the streamer talks, the Japanese and the English appear about one to two seconds later. On the first run, they start once the model has finished loading.
Reading subtitles over a fullscreen stream
In the LiveSub tab you cannot see the stream. Press "Show in a floating window". The subtitles move into a small window that stays on top of everything else, so you can put the stream in fullscreen and still read them.
A layout that works:
- Press "Show in a floating window" in LiveSub
- Go back to Twitch and make the stream fullscreen
- Drag the window somewhere it does not cover the action, such as the bottom edge
You can resize the window and scroll back to earlier lines. If you want it small, switch the display to "Translation only" so each line takes less space. If you want to keep chat visible, use Twitch's theater mode instead of fullscreen and put the window in the space next to it.
Tips for Twitch specifically
Add names to the word list. Speech recognition is bad at names, and Twitch streams are full of them: the streamer's nickname, regular viewers, game titles, characters, in-joke vocabulary. Open "Word list" and add the correct spellings, one per line. Japanese entries need at least 3 characters, English ones 4. Anything recognition mishears is corrected to your spelling.
Collabs are harder. When two or more people talk at the same time, the overlapping parts come out wrong or get dropped. A stream with one person speaking at a time is the best case.
Game audio matters. Loud music and sound effects reduce accuracy. Chatting segments will be more accurate than boss fights.
If you are gaming on the same computer, tick "Don't use the GPU (if games or video stutter)". Recognition gets a little slower, but it stops competing with your game for the GPU. Japanese-tuned is not available in this mode.
Long streams are fine. There is no time limit, because nothing runs on a server. "Download transcript" saves the whole session as a text file with timestamps, the Japanese and the English side by side, so you can go back and check something you missed.
Honest limits
- About one to two seconds of delay. This is not simultaneous interpretation
- It is machine translation. You get the gist; slang, jokes and wordplay often do not survive
- The Japanese can be misheard too, especially names. The word list helps, but it is not perfect
- Music, sound effects and overlapping voices reduce accuracy
- Chat and on-screen text are not translated. Only the audio is
- Computer only. It needs Chrome or Edge on a desktop or laptop
Related guides
- For game streams in particular, including the game voice setting, see watching Japanese game streams with English subtitles
- For streams on other sites, see how to translate a Japanese livestream in real time
- For VTuber streams, see watching Japanese VTuber streams with English subtitles
Try it
Open the Japanese stream you have been meaning to watch, then open LiveSub on your computer: