Free text-to-speech tools
Small free tools for the questions that come up around text-to-speech: what a credit balance is worth, how long a script runs, whether your SSML is valid, how to shift subtitle timing, and what your own browser can already say. None of them needs an account, and nothing you type is stored.
VoiceLabs is a browser voice studio from Devino Solutions: text-to-speech across seven open engines, instant voice cloning, downloads and captions, on one flat US$8 a month plan with a 7-day free trial. The tools are free because they answer the questions people ask on the way to choosing a voice product, and we would rather answer them well than make you sign up to find out.
ElevenLabs credit calculator
Turn an ElevenLabs credit balance or a pasted script into minutes of speech, the plan that covers it and what it costs, plan by plan.
Browser text-to-speech tester
Hear every text-to-speech voice built into your browser, see which run remotely, and learn how to use a cloned voice on a page.
Speech time calculator
How long a script takes to read aloud at a sourced average rate, or how many words fit in a set number of minutes.
SSML validator
Check SSML against the W3C SSML 1.1 rules, with a line and column for every error and a warning for vendor extensions.
Subtitle timing shift
Move every cue of an SRT or VTT file earlier or later, in the browser, without losing a cue.
Use them from a script
The speech time calculator, the SSML validator and the subtitle timing shift also answer over HTTP with no key and no account: JSON by default, Markdown for Accept: text/markdown. Limits, errors and the OpenAPI document are on the free tools API page.
When the question turns into a voice-over: VoiceLabs reads a script in a natural or cloned voice and exports the audio with captions. 7-day free trial.
Verified 2026-11-08 by the VoiceLabs team.