무료 온라인 오디오-텍스트 변환
AI 기반 전사로 오디오를 텍스트로 변환하세요. 오디오 파일 업로드, 마이크 녹음 또는 URL 붙여넣기. 100개 이상 언어, 10개 이상 모델, 98%+ 정확도.
1. 오디오 업로드
MP3, WAV, M4A, FLAC, OGG 또는 모든 오디오 형식을 업로드하세요. 최대 2GB.
2. AI가 오디오 처리
AI가 화자 감지 및 타임스탬프와 함께 오디오에서 음성을 추출합니다.
3. 트랜스크립트 받기
보기, 편집, 다운로드 또는 공유. TXT, SRT, VTT, DOCX 또는 PDF로 내보내기.
오디오-텍스트 변환 모델
필요에 맞는 AI 모델을 선택하세요 — 또는 최적의 모델을 선택해 드립니다.
100개 이상 언어로 오디오 전사
오디오를 텍스트로 변환할 준비가 되셨나요?
무료로 시작 →자주 묻는 질문
Upload your audio file or paste a URL, pick an AI model, and click Transcribe. STT.ai returns editable text with timestamps and speaker labels — most files finish in under five minutes.
MP3, WAV, M4A, FLAC, OGG, AAC, AMR, and 10+ more are all supported. You don't need to convert between formats first — upload whatever your recorder or app produces.
A little. Lossless formats like WAV and FLAC carry bit-perfect audio, so accuracy is bounded only by the model and speaker clarity. Lossy formats (MP3, M4A) at 128 kbps or higher are effectively identical; very low bitrates under 64 kbps can cost a few points.
Yes. STT.ai includes 600 free minutes per month with no signup for your first file. Paid plans starting at $5/month add longer files, private transcripts, and priority processing.
On clean audio our best models reach 95-97% accuracy (3-5% Word Error Rate). Background noise, overlapping speakers, and strong accents are the main factors that lower accuracy.
Yes. Free users can transcribe up to one hour per file; paid plans extend that to 8+ hours, which covers full-length podcasts, interviews, and audiobooks in a single pass.
Yes. Speaker diarization labels each voice (Speaker 1, Speaker 2, ...) and you can rename them in the editor — works on every supported audio format and model.
Export to TXT, DOCX, PDF, JSON, or SRT/VTT subtitles. JSON keeps machine-readable timestamps and speaker labels; DOCX and PDF are best for sharing and archiving.
Yes. 100+ languages with auto-detection, plus the option to set the language manually. Mixed-language audio is handled by switching mid-file, and you can translate the result afterwards.
Yes. Audio is processed and deleted by default, and Pro plans add client-side encryption so transcripts are unreadable without your key. Nothing is used for training without explicit opt-in.
Yes. Paste a link from any of 1,300+ supported platforms — podcast hosts, SoundCloud, YouTube, and more — and STT.ai fetches the audio directly. DRM-protected sources can't be transcribed.
Yes. The REST API accepts audio files directly, with Python and Node.js SDKs and a free tier of 100 minutes/month. Per-second billing applies beyond the free tier.