TTS Tester

A tester for developers and QA engineers to validate TTS outputs, compare voices, and tune prosody and speed with live audio previews.

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About This Tool

TTS Tester provides a structured environment for validating how text becomes speech, focusing on pronunciation and prosody across voices and languages.
It supports plain text and SSML, offers language/voice selection, and adjustable rate, pitch, and volume to replicate real-user scenarios. The tool returns an audio preview along with objective metrics such as duration and latency, enabling repeatable tests and regression checks.
By standardizing inputs and outputs, teams can compare voices, detect mispronunciations, and quantify performance differences. This is beneficial for accessibility QA, localization validation, and integration testing of voice-enabled applications and documentation. The platform emphasizes data privacy, Unicode support, and consistent behavior across locales, making it suitable for multi-language product suites.

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How to Use

Provide inputs: enter text or SSML and select language and voice.
Set rate, pitch, volume, and sample_rate.
Run synthesis to generate audio preview.
Review outputs: duration, latency, and audio quality.
Compare across voices or settings.
Export logs or audio for records.

Frequently Asked Questions

Find Quick Answers

Can I test SSML?

Yes. The tester accepts SSML snippets and applies supported tags for emphasis, pauses, and prosody. Availability depends on the chosen voice and backend capabilities; unsupported tags may be ignored.

What languages are supported?

The tool provides multi-language coverage with locale-aware voices. Availability varies by language and vendor; ensure the selected voice matches the target language and region for accurate results.

How is latency measured?

Latency is measured from the moment the input is submitted to the moment the audio stream begins playback. It accounts for backend processing, encoding, and network transfer, and is reported in milliseconds.

Can I export results?

Yes. You can export the generated audio file and a structured log containing input settings, outputs, and metrics for auditing and automated testing.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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