Audio Tools
Text to Speech
Convert text to spoken audio using your browser's built-in speech synthesis engine.
Your files stay on your device - processed locally via WebAssembly, never uploaded
0 / 5,000 characters
First use downloads 63MB - after that it's cached forever.
How it works
100% on-device: Voice models are downloaded once, then cached in your browser's Origin Private File System. No text or audio is ever sent to any server.
Powered by Piper TTS - a fast neural TTS engine from the Rhasspy project. Voice models are open-source (MIT) and hosted on Hugging Face.
Works on every device: Chrome, Safari, Firefox, Edge - desktop and mobile. No microphone or special permissions required.
Your text is processed locally on your device. OptiPix never sees what you type.
Embed this tool on your website
Copy this code to add the Text to Speech to your site for free. It runs entirely in your visitors' browsers - no API key, no usage limits.
<iframe src="https://optipix.art/embed/text-to-speech" width="100%" height="600" style="border:1px solid #e4e4e7;border-radius:8px;" title="Text to Speech by OptiPix" loading="lazy"></iframe> <p style="font-size:12px">Free tool by <a href="https://optipix.art/text-to-speech">OptiPix Text to Speech</a></p>
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About Text to Speech
Last updated: May 2026
OptiPix Text to Speech converts written text to spoken audio using the Web Speech Synthesis API built into your browser. Choose from all available system voices grouped by language. Adjust speech speed (0.5x to 2x) and pitch. The tool highlights the current word as it reads. Supports dozens of languages including English, Spanish, French, German, Japanese, Chinese, Hindi, and Arabic. Most voices run on-device with no network calls. Long text is automatically split into manageable chunks.
How It Works
The tool uses the Web Speech Synthesis API (SpeechSynthesisUtterance) built into modern browsers. It queries available voices via speechSynthesis.getVoices(), applies your speed/pitch settings, and reads the text aloud with word-level highlighting.
Use Cases
- •Have articles read aloud while multitasking
- •Proofread writing by listening
- •Language learning pronunciation
- •Accessibility for visually impaired users
- •Create audio content from written text
You Might Also Like
If you find Text to Speech useful, check out these related tools: Speech to Text, Word Counter, and Audio Recorder. All tools run entirely in your browser with no uploads or signups required.
Explore more: Browse all tools · Step-by-step guides · Tips & tutorials · Compare tools
What is the best free text to speech without sign-up?
OptiPix Text to Speech converts text to natural audio using Piper neural voices running locally in your browser via WebAssembly, with 50+ voices and WAV download. Unlike NaturalReader or TTSMaker, there are no character limits, no credits, and your text is never sent to a server.
OptiPix Text to Speech vs NaturalReader vs ttsmaker.com vs ElevenLabs
| Feature | OptiPix | NaturalReader | ttsmaker.com | ElevenLabs |
|---|---|---|---|---|
| Text sent to a server | Never - neural TTS runs locally | Yes | Yes | Yes |
| Free character limits | None | 20 min/day free | Daily quota | 10k chars/month free |
| Voice quality | Neural (Piper voices) | Neural | Neural | State-of-the-art neural |
| MP3/WAV download | Yes, free | Paid | Yes | Limited free |
| Works offline after voice download | Yes | No | No | No |
Competitor details reflect publicly listed free-tier features and may change.
Local neural speech synthesis
OptiPix runs Piper, an open neural text-to-speech system, in your browser via WebAssembly. Each voice is a compact neural model (20-60MB) that downloads once and caches; synthesis then runs entirely on your device with no per-character billing, daily quota, or cloud round-trip latency.
Piper voices are trained end-to-end (VITS architecture), producing natural prosody - sentence-level intonation, pauses at punctuation - rather than the robotic concatenative output of older free tools. Multiple languages and speaker styles are available, each as a separately downloadable voice.
Because text never leaves the tab, the tool is appropriate for unpublished manuscripts, confidential scripts, and internal documents. Output exports as a standard audio file for proofing-by-ear, accessibility, or voiceover scratch tracks.
Frequently Asked Questions
What languages are supported?
Can I control the speed?
Is this processed on my device?
Can I download the audio?
Is there a character limit?
Is there a really free text-to-speech with no character limit?
Can I use the generated audio commercially?
Why does listening to your own writing help editing?
How do I convert text to speech for free?
What is the most natural sounding text to speech?
Can I download text to speech as an audio file?
Is there a text to speech without a character limit?
Is text to speech private? Can I convert confidential text?
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