Privacy

Last updated: 19 October 2026

Your images are never stored

Images you upload are processed in memory to produce your results and are discarded as soon as the page is sent back to you. Sparkle never writes them to disk, keeps them in a database, or uses them to train models. The one exception is the AI explanation, described next.

AI explanations

To explain your results, Sparkle AI is sent a reduced-size copy of your image (at most 1024 pixels) and its colour-blind simulation, through OpenRouter, to an AI model provider (currently Anthropic's Claude). They process it to produce the answer under their own API data policies. Sparkle itself doesn't keep a copy. If your image is confidential, check it before uploading.

What we do keep

  • If you join the team waitlist: your email, company and what you'd like to check.
  • If you create an account (optional): your email and a securely hashed password.
  • Short-lived counters of how many checks come from each IP address, to prevent abuse.
  • A security cookie for forms, and a login cookie if you sign in.

We don't use advertising or third-party tracking cookies.

Deleting your account

Email us from your account address and we will delete your account and all data linked to it.