YouTube subtitle translator Japanese that runs in your browser. AI translation keeps every timestamp intact. Export in multiple formats, free to try.
Manual translation, hired voice actors, days of waiting. Creators and teams lose time and money on every single video.
Skip the old workflowCopying subtitles line by line into Google Translate?
Losing all timing when you paste translated text back?
Paying per-minute rates for a simple subtitle translation?
Stuck with tools that only support a few languages?
Upload, pick languages, and let the AI handle the rest. No software to install.
A few clicks, that is all.
A few clicks, that is all.
A few clicks, that is all.
A few clicks, that is all.
I run a small tech review channel out of Austin—about 180K subs, mostly US-based. Last March, a Japanese viewer commented that my S22 Ultra battery test was getting shared on 5ch forums. I dug into my analytics and saw Japan had jumped from 2% to 11% of my watch time in six weeks. The problem? I had zero Japanese captions. I tried uploading raw English SRTs to YouTube's auto-translate, but the results were rough—'fast charging' became something like 'rapid stomach filling.' I needed a YouTube subtitle translator Japanese tool that actually handled tech terminology. Now I drop my English SRT in, get back a clean Japanese VTT in about three minutes, and my Japan retention graph actually curves upward instead of flatlining at 45 seconds. Free tier covered my first eight videos before I needed more credits.
Every translated line keeps its original timestamp.
Translate subtitles to 34 languages in one click.
DeepSeek, Kimi, Qwen or your own Ollama models.
Download in any format, or copy the script for editing.
Upload multiple files and process them in sequence.
Fine-tune any line in the result, then export the final version.
Yes. The tool auto-splits lines to fit YouTube's 42-character limit for Japanese, so nothing gets cut off on mobile. I learned this the hard way when my first manual attempt had half-sentences disappearing on phones.
Absolutely. You upload the Japanese SRT or VTT as an additional subtitle track in YouTube Studio. My English stays as default, and viewers can switch to Japanese in the gear icon. Both tracks run independently.
It cleans up 'ums' and false starts for cleaner Japanese reading flow, but flags heavy slang for your review. I had 'this thing slaps' flagged so I could swap it to 'this sounds amazing' before export.
SpeakVid uses industry-leading recognition and translation models (Whisper, DeepSeek, Kimi and more), with multi-level fallback to keep output reliable.
Most tasks finish in minutes. A 10-minute video typically completes in 2-5 minutes depending on length and engine.