Privacy Policy

Last updated: December 16, 2025

Overview

This Privacy Policy explains how ThumbnailMaker.ai collects, uses, stores, and shares your information when you use our AI-powered thumbnail generation service.

Information We Collect

Account Information

When you create an account, we collect and store:

  • Email address
  • Name and profile image (from your authentication provider)
  • Account preferences (such as your content niche)
  • Subscription plan and credit balance

Uploaded Content

  • Face Photos: If you upload a face photo for personalized thumbnails, this image is stored on our servers and associated with your account. It is used to generate thumbnails featuring your likeness.
  • Style References: Style reference images you upload are processed to generate thumbnails but are not permanently stored after generation.

Generated Content

  • Thumbnails: All thumbnails you generate are stored on our servers and remain associated with your account until you delete them or delete your account.
  • Prompts: The text descriptions you provide to generate thumbnails are stored alongside your generated thumbnails.

Analytics Data

We use PostHog for product analytics to understand how users interact with our service. This includes:

  • Pages visited and features used
  • Session duration and user flows
  • Device and browser information

For authenticated users, this data is associated with your user profile to help us improve the product experience.

How We Use Your Information

  • To generate thumbnails based on your prompts and uploaded images
  • To manage your account, subscription, and credit balance
  • To provide customer support
  • To improve and optimize our service
  • To communicate important updates about the service

Third-Party Services

We use several third-party services to provide and improve ThumbnailMaker.ai. Your data may be processed by these services:

AI Image Generation

  • Google Gemini: Your prompts and uploaded images (including face photos) are sent to Google's Gemini AI to generate thumbnails. See Google's Privacy Policy.
  • OpenRouter: For certain image generations, we use OpenRouter as an API intermediary. See OpenRouter's Privacy Policy.

Note: We do not use your prompts or images to train AI models ourselves. However, we cannot control how Google or OpenRouter may use data processed through their services. Please review their respective privacy policies for details on their data practices.

Infrastructure & Services

  • Clerk: Handles user authentication and account management. See Clerk's Privacy Policy.
  • Convex: Stores your account data, thumbnails, and uploaded images. See Convex's Privacy Policy.
  • Autumn: Handles subscription billing and payment processing. See Autumn's Privacy Policy for details.
  • PostHog: Provides product analytics. See PostHog's Privacy Policy.

Cookies & Tracking

We use cookies and similar technologies for:

  • Authentication: To keep you logged in and secure your session
  • Analytics: PostHog uses cookies to track user sessions and behavior
  • Functionality: To remember your preferences and improve your experience

Data Security

We take security seriously and implement appropriate measures to protect your data:

  • All data is transmitted over encrypted HTTPS connections
  • User data is isolated so you can only access your own content
  • We follow industry best practices for secure application development

Data Retention

  • Account Data: Retained while your account is active and deleted upon account deletion
  • Generated Thumbnails: Retained until you delete them or delete your account
  • Face Photos: Retained until you remove them or delete your account
  • Analytics Data: Subject to PostHog's data retention policies

Your Rights

You have the right to:

  • Access: Request a copy of the data we hold about you
  • Delete: Delete your account and all associated data stored by us
  • Update: Modify your account information and preferences

To exercise these rights, please contact us at the email below. Note that deleting your account removes data stored by ThumbnailMaker.ai, but data that has been shared with third-party services (Google, OpenRouter, Clerk, PostHog, etc.) is subject to their respective data retention and deletion policies.

Children's Privacy

ThumbnailMaker.ai is not intended for use by children under the age of 13. We do not knowingly collect personal information from children under 13.

Changes to This Policy

We may update this privacy policy from time to time. Any changes will be posted on this page with an updated revision date. We encourage you to review this policy periodically.

Contact

If you have questions about this privacy policy or our data practices, please reach out via email at hello@thumbnailmaker.ai.

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