Free private local text to speech
Listen to articles, study pronunciation, or export WAV audio — synthesized entirely in your browser with natural voices.
Uses a voice already installed on your device. Nothing to download, but the browser gives no access to the audio, so it cannot be saved to a file.
Free to use · No account · No text upload · Offline after model download
What is on-device text to speech?
On-device text to speech converts written text into audible speech using computational resources located strictly within your personal device. Unlike cloud synthesis platforms that transmit every typed sentence to external data centers, LangsAny generates audio directly inside your web browser.
This ensures sensitive documents, private correspondence, and creative drafts remain entirely confidential. For a detailed exploration, read our guide on browser speech synthesis.
How to use text to speech in three steps
Choose between instant device narration or neural file generation.
- 01
Paste or type your text
Enter up to 5,000 characters in any supported language. Long paragraphs are automatically chunked into natural sentence-length utterances.
- 02
Select voice and reading rate
Choose between instant device voices or downloadable neural models, and adjust reading speed smoothly between 0.5× and 1.75×.
- 03
Listen instantly or export WAV
Press Speak to hear your text read aloud immediately, or generate a high-fidelity 16-bit PCM WAV audio file with neural synthesis.
Two voice sources, and why both exist
Rather than forcing a single compromise, this text to speech tool provides two distinct voice sources based on whether you need broad language coverage or downloadable audio files.
Your device’s voice
Free · Instant · 0 MB download
Harnesses system voices already installed on Windows, macOS, iOS, or Android. Covers 100+ languages including CJK (Chinese, Japanese, Korean) with zero network transfer. The browser plays audio directly through system speakers.
Downloadable neural voice
About 37 MB · Cached in browser
A high-quality neural Piper model running locally in WebAssembly. Delivers identical, natural cadence across all devices, works offline, and produces raw audio buffers you can download as WAV files.
System voice
Already installed by your operating system.
Neural voice
Downloaded once, then cached in your browser.
For the content you need to hear
The same text to speech engine serves very different people.
Language learners
Hear correct pronunciation for vocabulary lists, dialogue scripts, or exam passages. Adjust speed to 0.5\u00d7 for difficult phonemes, then repeat at natural pace.
Content creators
Generate clean WAV narration for YouTube subtitles, podcast intros, or social media clips without paying per-character API fees.
Accessibility and proofreading
Listening to your own writing surfaces awkward phrasing and typos that silent reading misses. Ideal for emails, reports, and cover letters.
Private documents
Legal briefs, medical records, and internal memos stay on your device. No text is transmitted, logged, or used for model training.
Text to speech by language
Different linguistic families present distinct phonetic hurdles — Japanese kanji homophones, tonal inflections in Mandarin, and consonant clusters in Slavic languages.
Your text stays on your device
Both system voice playback and neural voice synthesis run 100% on your machine. Your input text is never logged, analyzed, or shared with any external service.
Read our architectural breakdown in why private translation matters.
What to know before you start
- System voices cannot be saved as files
- The W3C Web Speech API routes synthesized audio directly to your sound card and intentionally blocks script access to raw buffers. To download audio, switch to a downloadable neural voice.
- Neural model download
- Each neural voice model is roughly 37 MB. It downloads once on first use and is cached in browser IndexedDB for subsequent offline runs.
- Voice quality varies by platform
- System voices depend on what your OS ships. Some platforms offer high-quality neural voices natively; others provide only basic synthesis. LangsAny scores available voices to pick the best one automatically.
- 5,000 character limit per conversion
- Longer passages are segmented into sentence-length chunks. This prevents the browser speech engine from silently dropping content in very long utterances.
- This is synthesized speech, not a human recording
- Pronunciation of proper nouns, technical jargon, and mixed-language text may be imperfect. Always verify critical audio before publishing.
Text to speech FAQ
Practical answers about device voices, neural models, speed settings, and WAV exports.
What is text to speech?
Text to speech is a technology that converts written text into audible spoken language using speech synthesis. LangsAny runs this entirely on your device — your browser synthesizes audio using either your operating system’s built-in voices or a downloadable neural model, with no text ever sent to a cloud server.
Why can I not download a WAV audio file from my device voice?
Because the standard Web Speech API feeds synthesized audio straight to the operating system sound card without exposing raw PCM audio buffers to web page scripts. This is a deliberate browser security restriction. To download a WAV audio file, switch to the Downloadable Voice tier, which runs a neural speech model inside the browser tab where audio samples can be captured.
What is the difference between system voices and neural voices?
System voices require zero file download and cover hundreds of languages, including Chinese, Japanese, and Korean, using voices provided by Windows, macOS, iOS, or Android. Neural voices require a one-time download of roughly 37 MB per language, sound consistent across all operating systems, and generate audio samples you can download as WAV files.
Which languages support downloadable neural voices?
Neural Piper models are currently available for English, Spanish, French, German, Russian, Arabic, Hindi, Vietnamese, and Romanian (9 languages total). All other languages seamlessly rely on your device’s native system voices.
Does text to speech work completely offline?
Yes. Your device’s native system voices are part of the local operating system and function with no internet connection. Downloaded neural voices are stored permanently in browser IndexedDB cache, allowing fully offline voice generation on planes or remote sites.
Is there a character or word length limit?
You can synthesize up to 5,000 characters per conversion. For longer passages, the tool automatically segments paragraphs into natural sentence units so browser speech engines do not drop lengthy utterances.
For a deeper look at how in-browser synthesis works, read the full technical guide.
Convert text to speech with this free voice synthesizer
Paste your text above, choose an instant device voice or neural model, and export clean WAV audio with zero cloud tracking.