Add UTM parameters while preserving the query and #fragment, with correct encoding and case warnings
Stateless Redirect Page Generator
Generate a small serverless go.html page that reads the destination from a Base64url #hash and redirects the visitor, with an optional delay, message and timestamp expiry, and blocks non-http/https links.
Workspace
How the result is calculated
The destination and settings are encoded as compact JSON {"u","d","e","m"} then Base64url (UTF-8) and placed after # in your page’s link. The generated page (one HTML file) decodes the fragment, checks that the protocol is only http or https (javascript: and others are rejected), compares the timestamp e to the visitor’s device clock, then redirects with location.replace immediately or after a countdown with a visible link. It carries noindex and a no-referrer policy. The fragment after # is not sent to the server on request.
Limits:
Base64url is encoding, not encryption: anyone can decode the destination, so do not rely on it for hiding. No click counting and no statistics. Expiry is checked with the visitor’s device clock and can be bypassed. Do not use the tool to hide a destination from visitors, to mislead them or to evade ad-platform policies; the interstitial shows the real link.
FAQ
Does it count clicks?
No; there is no server. Counting needs a tracking service.
Is the destination hidden?
No; the encoding is easy to decode.
