音声を文字起こし — AI無料文字起こし
任意の音声ファイルをアップロードして数分で正確なテキストを取得。MP3, WAV, M4A, FLAC, OGG 対応。99言語以上、自動句読点、タイムスタンプ。
音声を文字起こし — AI無料文字起こし を3ステップで使う
- 1
Upload your audio
Drop MP3, WAV, M4A, FLAC, OGG, or AAC. File size up to 2 GB. We also accept podcast RSS links and SoundCloud URLs.
- 2
Pick a language (or auto-detect)
Choose from 99+ languages or let AI detect automatically. Speaker separation available for interviews and meetings.
- 3
Get your transcript
Review in the editor, export as TXT, DOCX, PDF, SRT, or VTT. Share with a link or download immediately.
音声を文字起こし — AI無料文字起こし を選ぶ理由
99+ languages
Works with English, Spanish, French, German, Japanese, Chinese, and 90+ more. Auto-detect supported.
Speaker separation
Identify and label different speakers — ideal for interviews, podcasts, and meeting recordings.
All major audio formats
Supports MP3, WAV, M4A, FLAC, OGG, AAC, and WMA. No conversion needed.
Timestamps included
Word-level and segment-level timestamps let you locate any phrase in the original recording.
Private and secure
Encrypted in transit and at rest. Files auto-deleted within 24 hours. Never used for AI training.
音声を文字起こし — AI無料文字起こし の利用者
Podcasters
Generate show notes, searchable transcripts, and SRT captions for every episode.
Journalists
Transcribe interviews and press recordings. Search text instead of scrubbing audio.
Legal and compliance
Create official transcripts of depositions, hearings, or board meetings with speaker separation.
Researchers
Turn focus-group recordings and field interviews into analyzable text for coding and quotation.
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 audio formats are supported?
- MP3, WAV, M4A, FLAC, OGG, AAC, WMA — all major formats. We also accept podcast RSS and SoundCloud links.
- How long does transcription take?
- Most audio is transcribed in roughly 1/5 to 1/10 of the audio length. A 30-minute interview usually finishes in 3-6 minutes.
- Can it identify different speakers?
- Yes — our speaker-separation option labels speakers as "Speaker 1", "Speaker 2", etc. You can rename them in the editor afterwards.
- How accurate is the output?
- 85-99% for clear audio. Background noise, heavy accents, overlapping speech, and technical vocabulary can reduce accuracy. For mission-critical use, enable human review.
- Is there a free tier?
- Yes. Sign in for 30 free minutes per month. Anonymous upload accepts 5 minutes per file with 10 minutes daily. Pro plan at 10 hours per month coming soon.
- Do you keep my recordings?
- Files are encrypted in transit and at rest, and deleted automatically within 24 hours. We never use recordings for AI training.