its just a file editor online, one of the first recommended, and most trusted (According to users online, and Gemini Ai). It doesnt do much but put your file into text, allow you to change said text, and then redownload the changed file without ruining the og one. Its fine, but yes people should be careful with non-approved websites.
Viewing post in Easy Money Fabrication Method (EMFM) by yours truly.
btw the link you attatched was the wrong link that link is a scam website the real link is https://www.saveeditonline.com/