Text to Speech
Convert text to speech using your browser's built-in voices. Multiple languages, adjustable speed and pitch. No API key needed.
What is Browser Text-to-Speech?
Browser Text-to-Speech (TTS) uses the Web Speech API built into modern browsers (Chrome, Edge, Safari, Firefox) to synthesize speech from text using your operating system’s native voices. No API key, no cloud service, no upload — speech is generated locally on your device. The available voices depend on your OS: macOS includes 50+ high-quality voices (Samantha, Alex, premium ones); Windows offers David, Zira, and additional language voices; Android has Google TTS with 50+ language voices; iOS provides system voices including Siri-quality options. Use for: proofreading by ear (catching typos through hearing), accessibility for visually impaired users, language learning pronunciation, multitasking (listen while working), creating quick voiceover drafts.
How to use this tool
- Type or paste text — Any English (or supported language) text. Long passages work too.
- Select a voice — Dropdown shows all voices installed on your device, with language code.
- Adjust speed and pitch — 0.5x to 2x speed, 0 to 2 pitch — find your preferred listening voice.
- Click Play — Speech generated and played through your speakers/headphones.
- Stop or change settings — Stop button cuts playback. Change voice/text and click Play again.
Web Speech API capabilities
The browser’s SpeechSynthesis interface provides:
- SpeechSynthesisVoice: Each available voice with name, language, gender hints
- SpeechSynthesisUtterance: The text + settings to speak
- Properties: volume (0-1), rate (0.1-10, but typically 0.5-2 useful), pitch (0-2), voice, text, lang
- Methods: speak(), cancel(), pause(), resume(), getVoices()
Why browser TTS is great:
- Free — no per-character API costs like cloud TTS
- Private — text never uploaded to a server
- Fast — instant playback, no network latency
- Offline-capable — works without internet (after page loads)
- No API key — works for any user without setup
Trade-offs:
- Voice quality depends on user’s OS
- Limited voice customization compared to ElevenLabs, Google Cloud TTS
- No SSML support in basic browsers
Examples
- Proofread your essay: Listen at 1.2x speed — typos and awkward phrasing become obvious
- Language learning: Type French phrases, set voice to fr-FR, hear native pronunciation
- Accessibility: Blind user can hear blog posts using browser TTS
- Multitasking: Listen to articles while doing chores or commuting
- Audiobook draft: Hear your book chapter spoken aloud before recording professional
- Children’s stories: Bedtime story narration on demand
- Quick voiceover: Test script timing before recording
Tips & best practices
- Use 1.2-1.5x speed for proofreading — faster than reading aloud, but still clear
- Premium voices (macOS Samantha, iOS Siri) sound dramatically better than default Windows voices
- For natural rhythm, set pitch slightly above 1.0 (1.1-1.3)
- Most browsers limit text to ~32KB per utterance — split very long texts into chunks
- Chrome adds Google voices on top of OS voices — usually higher quality
- Use lang code (en-US vs en-GB) for accent control — available voices differ
- Test multiple voices before settling — quality varies wildly per device
Limitations & notes
Voice quality depends on user’s device — Windows default voices sound robotic vs Apple’s high-quality voices. Some browsers (Safari iOS) require user interaction before TTS works (click Play button). Doesn’t work in private/incognito mode on some browsers. No control over voice ‘personality’ or emotion. Cannot save audio to file (browser TTS doesn’t expose audio buffer). For professional voiceover, use dedicated services (ElevenLabs, Google Cloud TTS, Azure Speech) — but those need API keys.
Frequently Asked Questions
Why don’t I see many voices?
Voice count depends on your OS. Windows defaults: 5-10 voices. macOS defaults: 30+. Add more by installing language packs in System Settings > Language.
Why is the voice robotic?
You’re using a basic system voice. macOS and iOS have premium ‘enhanced’ voices — download in Settings > Accessibility > Spoken Content. Result: dramatically more natural.
Does this cost anything?
No — browser TTS is free and runs locally. Cloud TTS services (Google, Amazon Polly, ElevenLabs) charge per character but offer higher quality — this tool doesn’t use those.
Can I download the audio?
Not directly — browser TTS doesn’t expose audio buffer. Workaround: use a screen-recorder with audio capture to save the speech output.
Is it private?
Yes — text-to-speech happens locally on your device. Your text never leaves your computer/phone.
Why doesn’t it work in Safari?
Safari requires user interaction before playing audio — you must click the Play button. Won’t auto-play. Other browsers usually allow auto-play with text-to-speech.
What languages are supported?
All languages your OS has voices for. Common: English (multiple accents), Spanish, French, German, Mandarin, Japanese, Hindi. Check the voice dropdown for available languages on your device.