Tools
Fileraz
Tools
Fileraz
Try jpg to png, compress image, pdf…
Developer tool
Your files never leave your device
Check your Network tab and see
Work starts the moment you drop a file
No daily limit, no sign-up, no watermark
Enough to check a home LAN. Not a full VLSM planner or IPv6 calculator.
Math uses 32-bit unsigned operations in JavaScript. Unusual typed-array issues are unlikely for valid dotted quads.
The tool only does the bitwise math on the address and prefix you enter. It does not query WHOIS, RIR databases, or geo-IP, so nothing about the network leaves the page.
No geo-IP lookup.
IPv4 only.
No. This calculator is IPv4-only. IPv6 uses 128-bit addresses and a different notation that this simple masking tool does not handle.
It does not classify RFC 1918 or reserved blocks for you, but the network and broadcast numbers make it easy to see which range an address falls in.
No. The subnet math runs entirely in your browser.
That is the promise behind every tool here. Files are read in your browser tab, processed there, and discarded when you close it — never uploaded to our servers.