Castor

Local-First TTS Reader

Upload PDF, DOCX, Markdown, or TXT files. All document parsing and speech synthesis happen completely private and local on your device.

Drag & drop your document

PDF, DOCX, Markdown, or TXT up to 20MB

or

User Account

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Cloud sync and remote Speech APIs require registration.

Castor Admin DashboardADMIN

Manage user admission requests and OpenRouter speech models.

Manage pending and approved user registrations
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Privacy Warning: Cloud Speech Synthesis

You are about to enable the Cloud-hosted TTS engine. This requires sending your document text to external cloud APIs (Gemini or MAI-Voice-2) for processing.

Do you consent to transmitting your text content to remote servers?

Upgrade R2 Storage Quota

Choose a monthly extra storage capacity pack. Costs auto-renew every 30 days and are deducted from your prepaid USD wallet balance.

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