CastReader (https://castreader.com/) reads web pages, PDFs, Kindle books aloud and explains their content with synchronized highlighting.

Extension for Chrome, Edge and Firefox and iOS and Android apps.

The Quickread (Read & Explain) function generates an oral explanation while keeping the source text visible.
Text selections are read via a right-click.

French supported among the 8 languages offered.

Free with 20 minutes of listening per day and 3 AI explanations per day, 1 standard voice in French.

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On mobile: