About PTFO

PTFO is a small URL shortener with safety checks before links are created and again when links are used after a configured recheck period.

Bookmarklet

Create a browser bookmark with this URL, then click it while viewing a page to shorten the current tab.

javascript:(()=>{const f=document.createElement('form');f.method='POST';f.action='https://pt.fo/result';const i=document.createElement('input');i.type='hidden';i.name='url';i.value=location.href;f.appendChild(i);document.body.appendChild(f);f.submit();})();

Safety Checks

Some URLs will not be shortened. PTFO blocks known URL shorteners and redirectors, resolves bounded redirect chains, blocks private network targets, and checks configured safety providers such as AA419 and Google Safe Browsing.

If a link is later flagged as risky, PTFO shows a warning page instead of redirecting and does not display the full target URL.

Privacy Notes

PTFO stores the original submitted URL and the normalized URL needed to redirect short links. It records safety-check results, redirect-resolution metadata, and report-request records.

The app records client activity using HMAC-hashed IP addresses, IP prefixes, user agents, and report email addresses. Raw IP addresses are not stored in the application database, but Caddy access logs may contain client IP addresses, paths, user agents, status codes, and timestamps.

When provider API keys are configured, checked URLs or domains may be sent to external safety providers for evaluation.