About us
MainSpy is a set of free online tools for working with websites, text, and files.
Since 2009
MainSpy has been running since 2009, when the domain of the project's first site was registered on June 5. The early tools for webmasters appeared in those same years, and the first archived snapshots of the site date back to 2010.
The collection has changed over time. We have closed some of the old pages and rewritten the rest from scratch. New tools still appear, so the catalog on the home page is the place to check what is available right now.
What is inside
The catalog brings together almost three hundred free tools in eleven categories: SEO, Site checks, Domains and network, HTML and CSS, For developers, Text, Images, Generators, Files and documents, Security and privacy, and Device and internet. Every tool works without registration.
Reporting a bug or suggesting a tool
If a tool gives wrong results or a page does not open, use the bug report form. Its link sits in the header of every page.
For anything else, including suggestions for new tools, use the contact form.
Terms and your data
The rules for using the site are described in the terms of use. To see what happens to the information you enter into the tools, read the privacy policy.