A small product.
A clear privacy policy.
Last updated October 6, 2026.
Your initials and designs
When you create a signature, your two initials, selected style and a design instruction are sent through OpenRouter to its image provider (currently OpenAI). Do not enter anyone’s private information. We do not request your full name, email, photograph or existing signature.
Penri processes the generated image to produce a PNG and returns it to your browser. We do not save your initials, prompts, images or PDFs in our database, statistics store or application logs. Your browser creates the PDF locally. Designs stay in the open page and may be lost when you refresh or leave. Saving and sharing create copies wherever you choose.
The services that run the site
Vercel hosts Penri and processes network requests. OpenRouter and its model provider process generation requests under their own policies; we cannot promise that these providers keep no logs. See OpenRouter’s privacy policy, OpenAI’s privacy policy and Vercel’s privacy policy.
Usage statistics
We automatically collect product usage statistics. We create a random browser ID in local storage and a session ID in session storage. Sessions expire after 30 minutes without activity. We record visits, successful generations, pack selections, export actions, limited error categories and campaign sources. Records never contain initials, designs or prompts. If storage is unavailable, identifiers live only in memory.
Statistics are saved as private JSON files in a separate Vercel Blob store. Records older than 30 days are removed by a daily cleanup, so deletion may take up to one additional day. We use no advertising pixels or fingerprinting. Clearing this site’s browser data removes local identifiers. Collected records expire with retention.
Access and security
A short-lived signed token lets the open page request additional designs.
The private statistics dashboard uses a secure, HttpOnly sign-in cookie lasting up to eight hours. Failed and successful login attempts are rate limited using short records with a keyed network-address hash, never a raw address. Infrastructure providers may keep their own security logs.
Your files and the share menu
Saving requests a download; sharing opens your device’s share menu when supported. You choose the receiving app and recipient. Penri cannot confirm delivery or select a chat for you. The site does not upload your files to a public sharing link.
About the designs
These are AI design suggestions and sheets for independent practice. They may contain unclear letters or be difficult to reproduce. We do not promise uniqueness, legal validity, forgery protection or mastery of a signature.