Add Japanese subtitles to TikTok videos
Auto-generate Japanese (日本語) captions and burn them into your TikTok video. 100% browser-based, no upload, no watermark, free forever.
9:16 vertical · up to 10 minutes · powered by Whisper-Turbo
Why this works for TikTok
TikTok captions need to be bold, easy to read at small phone sizes, and stylized to match the platform aesthetic. Most viral TikToks use yellow or cyan captions with a thick black outline.
Why Whisper handles Japanese well
BurnSub uses OpenAI's Whisper-Turbo (Whisper code: ja),
which has been trained on hundreds of thousands of hours of Japanese speech.
Accuracy on clear-audio Japanese content is typically 92–97%.
Recommended styles for TikTok
Step-by-step: Japanese subtitles for TikTok
- Open BurnSub. No signup needed — just drop your TikTok-format video.
- Pick Japanese from the language dropdown so Whisper-Turbo transcribes accurately.
- Wait 30–60 seconds. The model runs locally on your GPU (or CPU as fallback).
- Edit captions if needed — every line is editable before burning.
- Pick a style from the recommended TikTok presets above.
- Burn + Download. WebCodecs encodes your video on your hardware. No upload at any step.
Frequently asked
Is auto-caption accurate for Japanese?
Whisper-Turbo's accuracy on Japanese audio is typically 92–97% for clear speech. Background noise, heavy accents, and slang reduce accuracy. Every caption line is editable before burning, so you can fix anything Whisper missed.
Does the TikTok algorithm reward burned captions?
Burned captions are read directly by viewers (the words appear on screen) — no AI-detection step required. TikTok typically rewards videos with on-screen text because watch-time goes up. Burned subs typically out-perform soft subs on sound-off feeds.
Can I use Japanese subs on a video that's spoken in another language?
Yes — generate the original-language transcript first, then use a translation tool to render it in Japanese, paste the translated SRT back in BurnSub, and burn. Native translation is on the roadmap.