Are these tools free?
Yes, entirely. There is no account, no sign-up, no watermark and no limit on how many times you use them. They exist because an application form should not cost you money to satisfy.
Are my files uploaded to a server?
No. Every tool here runs inside your own browser, so your documents never leave your device. There is no server to receive them and nothing is stored — closing the page is enough. That matters more than usual with these files, which are marksheets, certificates and signatures.
Do they work on a phone?
Yes, and they are built for one first. Most people applying for a government job in Assam are doing it on a phone, so the tools are sized for a thumb and work on a slow connection. A laptop works just as well.
Do I need to install anything?
No. They run in the browser you already have. Nothing is downloaded except the page itself, and the PDF tools fetch a small library the first time you open one.
Why do application forms have such strict size limits?
Because portals handling lakhs of applications cap what they store per candidate. The limits are usually stated in the notice — commonly 20 to 50 KB for a photo, a little more for a signature, and a few hundred KB for a certificate. Compress image and Compress PDF are here to meet exactly those numbers.