AI字幕ジェネレーター — SRT・VTTキャプションを作成
動画や音声から99言語以上の正確な字幕を自動生成。SRT, VTT, 焼き込みキャプションをエクスポート可能。無料プランあり。
近日公開
このツールは近日リリース予定です。ページは公開済みなのでブックマーク可能 — 処理が利用できるようになり次第お知らせします。
AI字幕ジェネレーター — SRT・VTTキャプションを作成 を3ステップで使う
- 1
Upload video or audio
Drop any video (MP4, MOV, AVI) or audio file (MP3, WAV, M4A). URL pasting from YouTube and TikTok also supported.
- 2
Generate captions
AI produces word-level captions with timestamps, automatic line breaks, and speaker labels if requested.
- 3
Export or burn in
Download SRT for YouTube, VTT for HTML5 video, or burn captions directly into your MP4 for social platforms.
AI字幕ジェネレーター — SRT・VTTキャプションを作成 を選ぶ理由
SRT, VTT, and burned-in
Export standard SRT/VTT or hardcode captions into an MP4 for TikTok, Instagram, and Shorts.
99+ languages
Caption in any of 99+ supported languages, with accurate punctuation and diacritics.
Inline caption editor
Fix timing, split/merge lines, and correct spelling in the browser before exporting.
Translate captions
One-click translation to English, Spanish, Japanese, Portuguese, and more after generation.
Time-aligned output
Every line stays in sync with speech — manual timing adjustments are rarely needed.
AI字幕ジェネレーター — SRT・VTTキャプションを作成 の利用者
Social video creators
Boost retention on TikTok, Reels, and Shorts — 85% of social video plays with sound off.
YouTubers
Add high-quality closed captions to improve SEO, accessibility, and international reach.
Educators
Make lectures accessible with WCAG-compliant captions for deaf and hard-of-hearing students.
Marketers
Caption product demos and webinars to improve comprehension and time-on-page across audiences.
世界中のクリエイターのために
世界中のクリエイター、ジャーナリスト、学生、研究者のために。
よくある質問
- What output formats are supported?
- SRT (universally supported), VTT (HTML5 web video standard), TXT (plain text), and MP4 with hardcoded captions (for TikTok/Instagram/Shorts).
- How accurate are the auto-generated captions?
- Typically 85-99% for clear speech in supported languages. Background music, accents, or overlapping speech reduce accuracy — use the inline editor to polish.
- Can I translate captions to other languages?
- Yes. After generating captions in the source language, one click translates them to 60+ target languages.
- What video and audio formats do you accept?
- Video: MP4, MOV, AVI, MKV, WebM, FLV, WMV. Audio: MP3, WAV, M4A, FLAC, OGG, AAC.
- Is there a free plan?
- Yes — sign in for 30 free caption-minutes per month. Anonymous use allows up to 5 minutes per file.
- Will the captions burn into my video permanently?
- Only if you choose the burn-in export option. SRT and VTT files stay separate from your video so you can edit or toggle them.