Check the download before you rely on it
Convert Online does not guarantee that a file will be accepted by a portal, a printer, a university, a court, or a client. The tool page tells you what the download contains. If you needed a different thing, the download can be "successful" and still be the wrong file. Open it in the program that will use it. Keep the original until that check is done.
Layout is the most common mismatch. PDF to Word and PDF to Excel read text. They do not rebuild columns, text boxes, and scanned tables. Word to PDF and Excel to PDF lay out the words or the values. They do not clone a desktop print preview. PowerPoint tools pull slide text. They do not copy themes and animations. If the page has to look identical, export from the application that created it.
Rules that do not live on this site
Passport photo sizes, exam upload caps, CGPA formulas, and mobile-carrier eSIM steps change. Articles may explain how to think about those rules and where to read the live source. They are not the live source. A 50 KB tool cannot know that your portal moved the cap to 40 KB yesterday. A CGPA article cannot know your university's scale. Read the transcript and the form you are about to submit.
Nothing here is legal, medical, or financial advice. Font conversion can scramble Hindi if you name the wrong source font. Encoding tools are not security. You are responsible for what you upload, what you paste, and what you send to someone else. If a result does not match the tool page, tell us through the contact form. If it does match the page and the portal still rejects it, follow the portal.