Whisper-quality Japanese transcription
OpenAI Whisper transcribes Japanese into properly-mixed kanji and kana, not romaji. Word-level timing for clean per-character burn-in.
"Hello, world!"
"Amazing video!"
"Subscribe now!"
"Watch this..."
Whisper · Japanese · Free · No watermark
Free Japanese subtitle generator
Drop a Japanese-language video and Captionly transcribes it with AI Whisper using kanji and kana, lets you fix names and proper nouns with a click, and exports SRT, VTT, ASS or a burned-in MP4. Detects Japanese automatically. Free, in-browser.
Japanese-language video has a massive global audience and a domestic one that increasingly watches on mute on commuter trains. Captions cover both: they make Japanese video accessible to sound-off viewers, indexable to search in Japanese, and ready to translate. Captionly is a free Japanese subtitle generator that outputs proper kanji and kana, with click-to-fix editing and standard exports.
Free AI subtitle generator — drop a video to get started
Drop your video here
or click to browse your files
Supports MP4, MOV, AVI, WebM (max 500MB)
100% freeno signupno watermark50+ languagesSRT · VTT · TXTprivate by defaultAI-powerededit on the flyTikTok-readypodcast-readycreator-loved100% freeno signupno watermark50+ languagesSRT · VTT · TXTprivate by defaultAI-powerededit on the flyTikTok-readypodcast-readycreator-loved
✦ Built for Japanese-language content
Built for Japanese-language content
Accuracy on Japanese audio, kanji+kana output, plus the controls editors need.
Auto language detection
Drop the file and Captionly detects Japanese automatically. No need to pick a language up front.
Click-to-fix proper nouns
Whisper misread a celebrity name or company? Click the word, type the correct kanji or kana, the timing stays locked.
Japanese-safe fonts
Shipping fonts render hiragana, katakana, kanji and full-width punctuation cleanly across web players and platforms.
Burn into MP4 or export SRT
Download a finished MP4 with subtitles baked in, or an SRT to drop into YouTube Studio, CapCut, Premiere or DaVinci.
No watermark, no signup
Free forever, no email gate, no Captionly logo on your Japanese-language video.
✦ ShowcaseReal videos.
Real videos.
Real captions.
See how creators of every kind are using Captionly. Drag to browse, click to play.
EN0:42
Neon Pop
thischangedmylife
EN1:18
Box Highlight
andthat'swhenIquit
EN0:21
Gradient Wave
onemorerep!
EN2:04
Karaoke
Tokyoatgoldenhour
EN0:56
Bounce
bestadviceever
ES0:33
Outline
novasacreer
EN0:28
Shadow Pop
let'sgo!victory
EN1:45
Underline
watchthistrick
EN0:52
Glitch
thisisinsane
EN0:38
Minimal
feelthebeat
EN0:19
Rainbow
hitthatmove
EN0:47
Pill
waitforit
✦ FAQ
Japanese subtitles — questions to ask
Practical answers for editors working with Japanese-language video.
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Free · Whisper · Japanese-ready
Caption your Japanese video
Drop a Japanese-language clip, edit the transcript if needed, ship an SRT or a captioned MP4. Free, in-browser, no signup.