Auto-caption Japanese videos

Automatically add accurate captions to your Japanese videos in less than 5 minutes. Sonix extracts speech, generates perfectly-timed captions, and exports to SRT or VTT format.

5-minute processing
SRT & VTT export
YouTube compatible
Video
Captions
Timing
SRT
VTT
YouTube
5min
Caption generation
1-hour Japanese video captioned in ~5 minutes
99%
Caption accuracy
Industry-leading Japanese speech recognition
40+
Video formats supported
MP4, MOV, AVI, MKV, WebM, and more
SRT/VTT
Caption export formats
YouTube, Vimeo, Facebook compatible
How It Works

Auto-caption Japanese videos
in 6 easy steps

1

Sign in to Sonix

Log in to your Sonix account or create a free trial account. Your trial includes 30 minutes minutes of free auto-captioning for Japanese videos.

2

Upload your video

Click 'Upload' and choose the Japanese video file from your computer that you want auto-captioned. Sonix supports 40+ video formats including MP4, MOV, and AVI.

3

Select language

Make sure you select Japanese as the language spoken before clicking the 'Transcribe' button. Our AI will extract and transcribe all speech from your video.

4

Split into captions

Once transcribed, go to the Subtitles menu and select 'Split subtitles.' Sonix automatically splits your transcript into properly-timed caption segments.

5

Polish your captions

Review and correct any proper nouns or technical terms. Use our editor to fine-tune timing and make your Japanese captions perfect.

6

Export captions

Click 'Export' and choose SRT or VTT format for your Japanese captions. Ready for YouTube, Vimeo, Facebook, or any video platform.

Common Questions

Frequently asked questions about
Japanese auto-captioning

How long does it take to auto-caption Japanese videos?

Sonix uses cutting-edge transcription algorithms to caption your Japanese videos in minutes. Our servers can auto-caption a one-hour Japanese video in under 5 minutes. You can then edit and fine-tune using our powerful subtitle editor.

What caption file formats does Sonix export?

Sonix exports Japanese captions in two industry-standard formats: SubRip (.srt) and WebVTT (.vtt). Both formats are compatible with YouTube, Vimeo, Facebook, and virtually all video platforms and players.

Can I burn captions directly into my Japanese video?

Yes! From the Subtitles menu, you can choose to burn-in the Japanese captions directly into your video. This creates a new video file with permanent, embedded captions that display on any device.

How accurate are Japanese auto-captions?

Sonix delivers 85-99% accuracy for Japanese auto-captioning, depending on audio quality. Clear audio with minimal background noise achieves the best results. Our AI models are trained specifically for Japanese speech patterns.

Can I customize caption styling?

Yes. Sonix lets you customize font size, font color, background color, and caption positioning. These styling options are preserved when you burn captions into your video.

Do auto-captions work with YouTube?

Absolutely. Export your Japanese captions as an SRT or VTT file and upload directly to YouTube. Your captions will sync perfectly with your video's audio.

Why Sonix

The best choice for
Japanese video captions

Blazing fast

Get your Japanese video captioned in minutes, not hours. Our AI processes at 10x real-time speed.

Export options

Export to SRT, VTT, or burn captions directly into your video. Compatible with all major platforms.

Easy editing

Fine-tune timing and text with our intuitive subtitle editor. Click any caption to jump to that moment.

Any video format

Upload MP4, MOV, AVI, MKV, WebM, and 40+ other video formats. No conversion needed.

Customer Reviews

Trusted by professionals worldwide

4.98 rating from 211 reviews

Your transcription tool is amazing. It's easy to use and gave me a great result.
MI
Marcio I.
Rio de Janiero, Brazil
I was especially impressed with the quality when it comes to other accents as most other companies can only give a good machine transcript if it is a US accent. Sonix is amazing and I have ...
PS
Preethi S.
Hyderabad, India
After trying a few other trial software, Sonix was by far the best and most correct.
JL
Josh L.
Balwyn North, Australia
Sonix is the best transcription program I have worked with.
VQ
Vitalyia Q.
Tomsk, Russia
I love the platform and its been a transcription godsend.
CS
Caridad S.
New York, NY USA
It was excellent and almost entirely spot on with transcription.
ZA
Zachary A.
San Marcos, CA USA
Get Started

Your Japanese video captions are
just 5 minutes away

Upload your Japanese video and get perfectly-timed captions in minutes. Start with 30 minutes minutes free—no credit card required.

99% accuracy. Every word matters.

AI transcription and translation in 53+ languages.