Japanese → Korean
To translate Japanese subtitles to Korean, upload your .srt or .vtt file to SubLingo, set the target language to Korean, and download the file with every timecode preserved. Korean text tends to run about 20% longer than Japanese, so lines that fit comfortably in Japanese can overflow and may need re-breaking to stay under 16 characters. Korean composes Hangul syllable blocks and does separate phrases with spaces, so Netflix caps lines at 16 characters and 12 cps. Keep each line under 16 characters and a reading speed below 12 characters per second — the limit Netflix sets for Korean subtitles — and save the file as UTF-8 so every character survives the round trip.
Last updated: 2026-06-11
Drop your subtitle file here, or click to browse
Supports .srt, .vtt, and .ass / .ssa
Drop in your Japanese .srt or .vtt file. SubLingo parses every cue and locks the timings in place.
Set the target language to Korean. The source is auto-detected, so you can leave it on Japanese or let it detect.
Run the translation. Only the text inside each cue is rewritten in Korean — never the timecodes.
Download the Korean subtitle file in the same format you uploaded, ready to drop straight onto your video.
Translating from Japanese into Korean: Korean text tends to run about 20% longer than Japanese, so lines that fit comfortably in Japanese can overflow and may need re-breaking to stay under 16 characters. Korean composes Hangul syllable blocks and does separate phrases with spaces, so Netflix caps lines at 16 characters and 12 cps. Because SubLingo rewrites only the text inside each cue, every timecode from the original Japanese file carries over to the Korean version unchanged.
Need the other direction? Translate Korean subtitles to Japanese.
Netflix caps Korean subtitles at 16 full-width characters per line and a reading speed of about 12 characters per second, across a maximum of two lines. SubLingo keeps the cue boundaries fixed, so you can re-break a long Korean line without touching the timing.
No. SubLingo translates only the subtitle text, so every start and end time is preserved exactly. Your Korean subtitles stay frame-accurate against the original video.
Yes. Both WebVTT (.vtt) and SubRip (.srt) Japanese files are supported, including multi-line cues. The output keeps the same format you uploaded.
Yes. You can translate a Japanese subtitle file to Korean in your browser for free, with no signup and nothing to install.
You can try it for free with no account. Upload your Japanese file, translate to Korean, and download the result.
Most Japanese subtitle files translate to Korean in a few seconds. Longer files with thousands of cues take a little more, but you stay on the page the whole time.
Typical movie and episode subtitle files — a few hundred KB and a few thousand cues — translate without trouble. Very large files may take longer to process, but the timecodes still come back unchanged.