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.
4
local TTS engines
99
STT languages
TXT
SRT / VTT exports
EPUB
PDF / TXT audio
Workflow directory
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 →](/tools/)
[ TXT SRT VTT Browser Whisper ](/tools/audio-to-text/)
Whisper STT
99 languages### Audio to Text
Private browser transcription for uploaded audio or video with transcript and subtitle-ready exports.
- Upload audio or video files
- Export transcript or subtitles
- Keep media on your device
SRT VTT Timestamps Captions
SRT + VTT### Subtitle Generator
Generate subtitle-ready SRT and VTT files for creator media, reviews, and accessibility workflows.
- Built around subtitle exports
- Great for Shorts and Reels
- Pairs with subtitle cleanup tools
YouTube TikTok Faceless Creator audio
WAV + MP3### Voice-Over Workflows
Generate creator narration, faceless channel audio, and short-form script voice-over directly in your browser.
- Paste scripts and generate narration
- Export WAV or MP3
- Built for repeatable creator workflows
EPUB PDF TXT WAV/MP3 Reading workflows
EPUB / PDF / TXT### Ebook to Audio
Convert EPUB, PDF, and TXT reading material into speech for study, accessibility, and audiobook draft listening.
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Parse long-form reading material
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Review sections before generation
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Export listening-ready audio Platform capabilities
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
Kokoro
Primary free text to speech engine for natural browser voice generation and multilingual voice workflows.
8 expressions · lightweight
Kitten
Lightweight local TTS for fast drafts, smaller devices, and quick voice-over experiments.
25 voices · CPU friendly
Piper
CPU-friendly speech synthesis for offline narration and reliable long-form audio drafts.
5 languages · local
Supertonic
Multilingual browser TTS with style presets for English, Spanish, Portuguese, French, and Korean.
99 languages · transcription
Whisper
Audio to text, video transcription, timestamps, SRT subtitles, and VTT caption exports.
Use cases
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
Generate narration, transcript rough cuts, subtitles, and repurposing assets without moving scripts or clips through a third-party dashboard.
Accessibility
Turn text, documents, and spoken media into formats that are easier to listen to, caption, search, and review.
Study & Documents
Convert reading queues, TXT exports, EPUBs, papers, and PDFs into listening workflows for revision and hands-free review.
Teams & Research
Use local transcription for interviews, meetings, and source material when privacy matters more than cloud convenience. Proof
Why teams pick OfflineTTS over upload-first audio tools #
OfflineTTS is built around private browser processing, free usage, and direct export paths for voice, transcript, subtitle, and document audio work.
| Feature | OfflineTTS | ElevenLabs | NaturalReader | Murf |
|---|---|---|---|---|
| Price | Free | $5–$22/mo | $9.99/mo+ | $23–$79/mo |
| Usage limits | Unlimited | Per-character | Free tier caps | Per-character |
| Offline mode | Yes | No | No | No |
| Privacy model | On-device / browser-first | Server-side | Server-side | Server-side |
Private AI audio tools FAQ #
The workflows stay browser-first, but each tool family solves a different job. Here is the short version.
Ready to try it
Start with the audio workflow you actually need #
Open the voice workspace, start transcription, or jump into the tools directory for subtitle cleanup and EPUB, PDF, or TXT listening workflows.