Privacy policy
This site (media.tools.ryusei.io) is a free, individually run collection of in-browser media conversion tools. This page describes how users' files and data are handled.
Files you process
Conversion, compression and editing of images, audio and video all run inside your browser. Files and their contents are never transmitted to this site's servers, and this site never stores or views them.
Information sent to outside companies (external transmission of user information)
This site uses Google services for analytics and advertising. The information each service sends to the outside company (Google) is described below.
Analytics
Google Analytics is used to improve the site. To count visits and see how the site is used, the URL and title of the page you view, the URL of the previous page (referrer), time on page, actions on the page (scrolling, clicks on links to other sites, etc.), your browser and OS type, language and screen size, your IP address and a cookie identifier (cookies whose names begin with _ga) are sent to Google. The contents and names of processed files are not included. You can stop this by installing the Google Analytics Opt-out Browser Add-on provided by Google.
Advertising
Ads are served through Google AdSense to cover running costs. When you open a page with ads, the page URL, the referrer, your IP address, your browser and OS type, language and screen size, identifiers such as cookies and advertising IDs, and records of ad views and clicks are sent to Google. Google uses this information to show ads (including ads based on your interests), to count ad views and clicks, and to detect invalid clicks. Personalised ads can be disabled in Google's Ads Settings.
Cookies
Cookies are used for the theme setting (light / dark) and for the analytics and advertising described above. No information about processed files is stored in cookies.
Processing statistics
To improve the service, this site collects statistics about whether processing succeeded on its own server. What is sent: the tool you used and the settings you chose (output format, quality, etc.), your device specs (GPU, memory, core count), the input format with a rough size, how many files succeeded or failed and how long it took, and the error type and details when something fails. The files themselves, file names, text, subtitles or prompts added to a video, and IP addresses are not sent. The data is deleted automatically after 30 days and is never shared with third-party services. You can turn it off at any time with the switch at the bottom of each tool page, and nothing is sent if your browser signals Do Not Track or Global Privacy Control.
Contact
For questions about this policy, please contact the maintainer via the links in the footer.
Last updated: 7 October 2026