Check

Check safely in your browser

Browser-centered processing

Check processing runs in the browser as much as possible.

Designed not to store concrete inputs

The tool is not designed to store input text, URLs, file contents, or detected values.

No external transmission

Your inputs are not sent to external AI APIs, external analysis servers, or advertising trackers.

To let you move from Check results to Learn articles and return, the browser may handle minimal temporary state such as the overall risk and recommended articles. Even then, it does not store input text, the original URL, Clean URL, concrete URL parameter values, file name, file size, last modified time, or detected metadata values. This tool does not guarantee complete anonymity. It is a support tool for noticing and reducing identification risk before publishing or when reviewing your current situation.

Choose your role or purpose.

The risks to watch and the topics to learn change depending on your purpose. Choose the option closest to your situation.

Choose your situation.

Choose what to check this time.

Unselected items are excluded from score calculation. Selected: 4

Text Risk Check

Description

Checks text for clues that could lead to identification.

Names, place names, occupations, schools, affiliations, dates and times, living area, URLs, email addresses, and social media handles may be small pieces of information on their own, but can connect to a person when combined.

This is a local first-pass check. It does not fully understand context like a human, so do not judge something safe based only on detected results.

URL Cleaner

Description

Checks tracking parameters and unnecessary query parameters included in a URL.

Parameters such as utm_source, utm_medium, utm_campaign, gclid, and fbclid may be used to show traffic source, ads, campaigns, or click IDs.

Safe Clean removes only known tracking parameters. Strict Clean removes all query parameters, but may break page display or functionality. Manual Review does not change the URL; it is a mode for checking parameter meanings and values.

Caution

This tool removes known tracking parameters. Unknown parameters or site-specific tracking parameters may remain. Check the final URL yourself before sharing.

Behavioral Trace Check

Description

Checks identification risks created by behavior, such as posting times, overlapping topics, account separation, search behavior, and device or browser environment.

Anonymity can break not only through text and files, but also through behavior patterns.

This check reviews behavioral traces to watch based on your role and purpose.

My real-name account and anonymous account cover similar topics

I reuse a username, icon, profile, or phrasing

I reuse the same email address or phone number

I use the same device, browser, or extensions

I usually post at the same time of day

I have searched for my real name, old handles, or past usernames

Past social media accounts or profiles may still be public

Photos of me may remain on company sites, school sites, organization pages, event pages, or other people's posts

I have checked whether old pages remain on archive sites such as the Wayback Machine

I have checked whether old personal information or images remain in search results

I have checked the IP address visible externally

I have checked for DNS leaks

I have checked for WebRTC leaks

I understand metadata

I understand URL tracking

I consider correlation risk between posts

I draft in a real-name environment

I store files in personal cloud storage

I search related topics with a personal account

My text includes my living area, workplace, school, or community affiliation

I am about to post right after a real-world event

I plan to post at a specific time

I plan to post the same content on multiple sites

I plan to keep replying as the same anonymous persona

I separate accounts by purpose

I separate devices, browsers, and usage environments

I do not mix my real-name persona and anonymous persona

I regularly review past posts

I avoid fixed posting times and behavior patterns

Network Anonymity Check

Description

Checks identification risks created by your network environment, such as IP address, DNS, WebRTC, VPN, Tor, and browser environment.

Anonymity is not determined by IP address alone. DNS, WebRTC, connection timing, browser fingerprints, login state, and similar signals can combine into clues for identity inference.

I use an anonymity-focused communication route such as a VPN or Tor

I have a setting that stops communication if the VPN or Tor connection drops

I have checked for DNS leaks

I have checked for WebRTC leaks

I use a browser that is not logged in to real-name accounts

I separate my anonymity browser from my everyday browser

I have not installed unnecessary extensions in the browser used for anonymity

I understand fingerprinting risks from browser language, time zone, screen size, fonts, and similar settings

I understand that Tor or a VPN alone does not make me completely anonymous

I have a policy not to log in to personal cloud, personal email, or real-name social media during anonymous activity

I do not mix the same device or browser environment between real-name activity and anonymous activity

I check post content, timing, and account operation as well as the network environment