Speech Synthesis Tester

Speaks text with the Web Speech API and lets you choose a system voice, rate, pitch and volume.

Artifact by Simon Willison

IndexedApache-2.0Audio & videoNo sign-up

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Opens tools.simonwillison.net in a new tab. Nothing to install.

Open Speech Synthesis Tester Source code

You provide: Text and voice settings
You get: Spoken audio
Account: No sign-up needed
AI: No AI: a plain tool
Your input: Not stated: check the tool's privacy notes before using private data
Price: Free to use
Made with: AI-built app
Source: Open source
Link check: Answered on Nov 1, 2026

About

Speech Synthesis Tester is an AI-built single-page app in the audio video category (text to speech). It opens in your browser, so there is nothing to install. You provide text and voice settings and get spoken audio. It needs no account. It is a plain tool: no AI model is involved. The source code is public on GitHub (simonw/tools).

Category: Audio & video · text to speech

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Details

Auth: No auth
License: Apache-2.0
Repository: github.com/simonw/tools
Website: tools.simonwillison.net/speech-synthesis
First seen: Oct 31, 2026
Last checked: Nov 1, 2026
Source: GitHub

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Cite this page

Speech Synthesis Tester: free online tool. Agent Mart. https://agentmart.dev/artifacts/speech-synthesis-tester (last updated 2026-11-01)