Length and layout
Chinese is far fewer characters — often a third to half the count than the English original. Both languages are written left to right, so the layout does not change — only the wording and line length do.
English → 中文
Translate English video into Chinese subtitles
Upload a video in English. SubFlow transcribes the speech, translates every caption into Chinese, and keeps both languages on the same timeline so you can review them side by side — then export subtitles, a subtitled video, or a Chinese dub.
30 free minutes monthly · No credit card
What changes
English and Chinese, side by side.
| English (spoken) | Chinese (subtitles) | |
|---|---|---|
| Script | Latin | Chinese (Simplified) |
| Direction | Left to right | Left to right |
| Reading speed | 15–17 chars/sec | about 9 chars/sec |
| Line length | about 42 chars | about 16 chars |
| AI dub voice | en-US | cmn-CN |
Getting Chinese right
Chinese fits in far fewer characters but is read more slowly per character, so aim for about 16 characters a line; punctuation is full-width (，。).
Workflow
From English to Chinese in three steps.
Upload the English video
Add a video or audio file. SubFlow transcribes the English speech into timed captions.
Translate into Chinese
Pick Chinese as the target. Every caption is translated with the surrounding lines as context, then shown beside the original.
Review and export
Fix names and terms, split any caption that runs long, then export Chinese or bilingual subtitles, a subtitled video, or a Chinese dub.
Common questions
English to Chinese, answered.
Can SubFlow recognise English speech automatically?
Yes. Leave the source on automatic detection or pick English yourself. Accents, fast speech and overlapping speakers are handled well by the Whisper model; background music is the most common cause of a dropped line.
Will the Chinese subtitles fit on screen?
Chinese reads comfortably at about 9 characters per second with about 16 characters per line. Chinese is far fewer characters — often a third to half the count than the English original. Review the longest captions and split any that crowd two lines.
Can I dub a English video into Chinese?
Yes, on the Pro plan. The Chinese dub uses a cmn-CN voice and is spoken from the translated subtitles, so correcting a line in the editor changes what the voice says.
Can I export English and Chinese together?
Yes. Export the Chinese subtitles alone, the original English, or a bilingual SRT with both on each caption — or burn either into the video.