Private AI Audio Tools - Free TTS, STT, Subtitles, Ebook Audio | OfflineTTS Home TTS & STT 🎙️ Kokoro TTS (54 voices) 🐱 Kitten TTS (8 voices) 🔊 Piper TTS (26 voices) 🎤 Supertonic TTS (5 langs) 📝 Whisper STT (99 langs)

Voices All 54 Voices Heart (A) Bella (A) Female Male Deep Male 🇺🇸 English 🇨🇳 Chinese 🇯🇵 Japanese 🇪🇸 Spanish 🇫🇷 French 🇮🇳 Hindi

Use Cases YouTube Shorts & Reels Audiobook Podcast E-Learning Accessibility Narration

Tools 🧰 Browse All Tools<br>📝 Audio to Text<br>🎬 Subtitle Generator<br>▶️ YouTube Voice Generator<br>📚 Ebook to Audio<br>🧹 Text Cleaner<br>✏️ Punctuation Fixer<br>📝 Subtitle Cleaner<br>🎬 Script Formatter

Blog About FAQ Start TTS

Private AI Audio Tools in Your Browser

Free text to speech, speech to text, subtitles, and ebook audio.

OfflineTTS brings browser text to speech, audio to text, subtitle generation, and EPUB, PDF, or TXT to audio workflows into one private AI audio toolkit.

Start TTS Start STT<br>Ebook to Audio

Private by design Free to use No signup Browser-first

local TTS engines

99<br>STT languages

TXT<br>SRT / VTT exports

EPUB<br>PDF / TXT audio

Workflow directory<br>Find the right private AI audio workflow

Start with the job: free text to speech, audio to text, subtitle generator, creator voice-over, or EPUB, PDF, and TXT listening.

Browse all tools →

Whisper STT<br>99 languages<br>Audio to Text<br>Private browser transcription for uploaded audio or video with transcript and subtitle-ready exports.<br>TXT SRT VTT Browser Whisper<br>Upload audio or video files<br>Export transcript or subtitles<br>Keep media on your device

Open workflow

Captions<br>SRT + VTT<br>Subtitle Generator<br>Generate subtitle-ready SRT and VTT files for creator media, reviews, and accessibility workflows.<br>SRT VTT Timestamps<br>Built around subtitle exports<br>Great for Shorts and Reels<br>Pairs with subtitle cleanup tools

Open workflow

Creator audio<br>WAV + MP3<br>Voice-Over Workflows<br>Generate creator narration, faceless channel audio, and short-form script voice-over directly in your browser.<br>YouTube TikTok Faceless<br>Paste scripts and generate narration<br>Export WAV or MP3<br>Built for repeatable creator workflows

Open workflow

Reading workflows<br>EPUB / PDF / TXT<br>Ebook to Audio<br>Convert EPUB, PDF, and TXT reading material into speech for study, accessibility, and audiobook draft listening.<br>EPUB PDF TXT WAV/MP3<br>Parse long-form reading material<br>Review sections before generation<br>Export listening-ready audio

Open workflow

Tool map<br>Popular private audio routes

14 tools

Pick the closest workflow family, then jump directly to the tool that matches the file, media type, or creator output you need.

Speech to Text & Subtitles<br>Private audio to text, video transcription, SRT generation, VTT export, and subtitle cleanup for uploaded media.<br>Audio to Text Subtitle Generator Subtitle Cleaner YouTube Transcript

Text to Speech & Creator Voice<br>Free browser text to speech for YouTube voice-over, TikTok narration, faceless channels, and repeatable script workflows.<br>YouTube Voice Generator TikTok Voice Generator Faceless YouTube Voice Open TTS Workspace

Ebook & Document Audio<br>Convert EPUB to audiobook drafts, PDF to audio, TXT to speech, and long-form reading material into private listening workflows.<br>Ebook to Audio EPUB to Audiobook PDF to Audio TXT to Audio Book to Speech Document to Audio

Platform capabilities<br>Local engines for TTS, STT, captions, and document audio

Choose Kokoro, Kitten, Piper, Supertonic, or Whisper from the same browser-first platform for voice generation, transcription, subtitles, and reading workflows.

All core tools run in the browser. English TTS and Whisper STT can work offline after model download.

54 voices · 9 languages<br>Kokoro<br>Primary free text to speech engine for natural browser voice generation and multilingual voice workflows.<br>8 expressions · lightweight<br>Kitten<br>Lightweight local TTS for fast drafts, smaller devices, and quick voice-over experiments.<br>25 voices · CPU friendly<br>Piper<br>CPU-friendly speech synthesis for offline narration and reliable long-form audio drafts.<br>5 languages · local<br>Supertonic<br>Multilingual browser TTS with style presets for English, Spanish, Portuguese, French, and Korean.<br>99 languages · transcription<br>Whisper<br>Audio to text, video transcription, timestamps, SRT subtitles, and VTT caption exports.

Use cases<br>Built for creators, accessibility, study, and private research

The homepage links to real tools instead of thin landing pages: generate speech, transcribe audio, create subtitles, and turn documents into listening material.

Creators<br>Generate narration, transcript rough cuts, subtitles, and repurposing assets without moving scripts or clips through a third-party dashboard.

Accessibility<br>Turn text, documents, and spoken media into formats that are easier to listen to, caption, search, and review.

Study & Documents<br>Convert reading queues, TXT exports, EPUBs, papers, and PDFs into listening workflows for revision and hands-free review.

Teams & Research<br>Use local transcription for interviews,...