However, a URL can contain search terms, user IDs, session information, tracking parameters, and sharing-source information.
If you share a link as-is, your behavior, account, or browsing route may be passed to the other person.
When thinking about anonymity, URLs need to be checked before publication.
URLs contain information
A URL does not only show the location of a web page.
It may contain information like the following.
Information contained in a URL
Example
Anonymity caution
Search term
q=keyword
Shows interests or research content
User ID
user=12345
Shows an account or target person
Tracking
utm_source=...
Shows where someone came from
Session information
session=...
Connects to an account or operation state
Sharing ID
share=...
Leaves a trace of the sharer or sharing route
A URL carries more information than it appears to.
A URL is the string shown at the top of the browser, so it is easy to overlook. You may check the body text and images, but paste the URL as-is. However, a URL contains not only "which page this is," but also information that indicates "which search it came from," "which sharing link it is," or "which account operation it relates to."
For anonymity, treat URLs as something to check before publication, just like text. Whether the link is short or long, look at its contents before sharing it.
Watch tracking parameters
URLs opened from advertisements, email, social media, newsletters, and similar sources may have tracking parameters attached.
For example, strings such as utm_source, utm_medium, and utm_campaign.
These are used to analyze where someone came from and which campaign they came from. For anonymity, they become clues about the sharing source or browsing route.
Before sharing a link, check for unnecessary parameters.
Tracking parameters are used for advertising and web analytics. They do not necessarily reveal a personal name by themselves. However, they may indicate which email, which social media site, which campaign, or which medium someone came from.
When sharing links for anonymous activity, tracking parameters left in the URL may expose the browsing route or sharing source. Separate the necessary URL for the page itself from parameters used for analytics.
Search URLs are especially risky
Search result page URLs may contain search terms.
Search terms may include a person, area, organization, illness, concern, internal information, incident name, and similar details being researched.
If you share a search result URL as-is, the other person learns what you searched for.
Rather than sharing a search URL, it is safer to check and share the URL of the needed page itself.
Search terms directly show a person's interests or research target. If you paste a URL for a search involving a person's name, company name, disease name, area, incident name, internal information, or consultation destination as-is, the other person learns what you were researching. Even in screenshots, search terms may appear in the search box or URL bar.
Even if you want to share search results, first think about the purpose of sharing. Is what you want to show the search term, or the page found through the search? In many cases, what is needed is not the search result page, but the target page itself.
Watch URLs while logged in
In logged-in services, URLs may contain information related to the account or operation state.
Admin screens. Shared pages. Cloud files. Ticket management. Inquiry history.
If these URLs are published as-is, a target person, case, organization, or internal information may become visible.
Also, be careful with shared links that can be accessed only by knowing the URL. They may be set so that anyone with the link can view them.
In cloud services, ticket management, inquiry forms, admin screens, e-commerce sites, and reservation sites, a URL may contain a target ID or operation ID. That does not necessarily mean someone can log in with the URL alone, but a case name, user ID, order number, sharing ID, or organization ID may be visible. Publishing an internal URL may also reveal an organization name or system name.
For shared links, also check permission settings. Can everyone who knows the link view it, or only specific accounts? Can they download it? Can they edit it? Not only the URL string, but also the link permissions affect anonymity.
Shortened URLs make the contents hard to see
Shortened URLs are convenient, but they make the destination hard to see.
Where does it go? Does it include tracking? Whose sharing link is it? Will it be redirected on the way?
These things become hard to understand.
In situations where anonymity matters, it is safer not to use shortened URLs carelessly. If needed, expand the link and check the destination.
Shortened URLs make the contents harder to understand for both viewers and posters. They may pass through multiple redirects on the way. The shortening service may record access counts, times, and information about users. For sharing that needs anonymity, separate the benefit of shortening from the risk that the link becomes harder to inspect.
Also, a personal shortened link or a link created from a management screen may connect to the creator or campaign. Prioritize reducing unnecessary identifying information over making the URL short.
What to check before sharing a URL
Before sharing a URL, check the following points.
Whether it contains search terms
Whether it has tracking parameters such as utm_
Whether it contains a user ID or account ID
Whether it has a string that looks like session information
Whether the permissions for a cloud sharing link are appropriate
Whether you checked the destination of a shortened URL
Whether the sharing source connects to you or your organization
URLs are a pre-publication check target, just like body text and images.
When checking a URL, first look at the query string after ?. Next, look for strings that seem related to identification, such as utm_, ref, session, token, share, and user. However, if you remove parameters that are actually required, the page may stop opening. If you are not sure whether something can be removed, open it in a separate environment and check.
Separate example URLs from real URLs
In articles and explanations, example strings are sometimes used to explain URL structure. For example, example.com is a domain often used for explanation. Treat strings like this as examples for explaining URL structure, not as introductions to real services.
On the other hand, when introducing an actual tool or service, write the official site URL clearly. It is important not to confuse example strings with official URLs you want readers to visit.
Summary
URLs may contain search terms, user IDs, tracking parameters, session information, and sharing IDs.
If you share a link as-is, the browsing route, research content, account, organization, or sharing source may become visible.