Does Private IPv4 upload my file or text to Tool-You servers?

No. Private IPv4 runs in this browser tab. Files stay on the device. Limit note: RFC1918, loopback, link-local. Invalid quads fail. Not a conversion.

Should I use IPv4 Integer instead of Private IPv4?

Use Private IPv4 when you need RFC1918, loopback, or link-local flag. Use IPv4 Integer when you need Convert IPv4 ↔ integer (decimal or hex). They share a category (Network) but not the same job.

Private IPv4

RFC1918, loopback, or link-local flag.

Flags 10/8, 172.16/12, 192.168/16, 127/8, and 169.254/16. Unlike IPv4 Integer this is not a conversion. Unlike IPv4 in CIDR you do not type a prefix. Invalid dotted quads fail. Local only.

What Private IPv4 does

Flags 10/8, 172.16/12, 192.168/16, 127/8, and 169.254/16. Unlike IPv4 Integer this is not a conversion. Unlike IPv4 in CIDR you do not type a prefix. Invalid dotted quads fail. Local only.

This URL is only for Private IPv4 (network · private ipv4). RFC1918, loopback, or link-local flag. Other Network tools on Tool-You look similar in the chrome, so the job definition below is the part that belongs to Private IPv4 alone: Flags 10/8, 172.16/12, 192.168/16, 127/8, and 169.254/16. Unlike IPv4 Integer this is not a conversion. Unlike IPv4 in CIDR you do not type a prefix. Invalid dotted quads fail. Local only.

How to use Private IPv4

Keep this tab on Private IPv4 (/network/private-ipv4). Pasting into the wrong Network tool (for example IPv4 Integer) changes the job.
Paste or type the input Private IPv4 expects. Path hint: network · private ipv4. RFC1918, loopback, or link-local flag.
Apply the Private IPv4 action only. IPv4 in CIDR is a different transform (IPv4 in CIDR with network.). Flags 10/8, 172.16/12, 192.168/16, 127/8, and 169.254/16. Unlike IPv4 Integer this is not a conversion. Unlike IPv4 in CIDR you do not type a prefix. Invalid dotted quads fail. Local only.
Copy the output of Private IPv4 if you need it elsewhere. Size/complexity still follows: RFC1918, loopback, link-local. Invalid quads fail. Not a conversion.
If the text job is actually Convert IPv4 ↔ integer (decimal or hex)., leave Private IPv4 and open IPv4 Integer.

When not to use Private IPv4

Skip Private IPv4 when a neighbor tool matches better — start with IPv4 Integer or IPv4 in CIDR — or when the description already warns the job will fail. In the tool’s own words: Flags 10/8, 172.16/12, 192.168/16, 127/8, and 169.254/16. Unlike IPv4 Integer this is not a conversion. Unlike IPv4 in CIDR you do not type a prefix. Invalid dotted quads fail. Local only.

Questions about Private IPv4

What does Private IPv4 do that other Network pages on this site do not?: Flags 10/8, 172.16/12, 192.168/16, 127/8, and 169.254/16. Unlike IPv4 Integer this is not a conversion. Unlike IPv4 in CIDR you do not type a prefix. Invalid dotted quads fail. Local only. Short version: RFC1918, loopback, or link-local flag.
Does Private IPv4 upload my file or text to Tool-You servers?: No. Private IPv4 runs in this browser tab. Files stay on the device. Limit note: RFC1918, loopback, link-local. Invalid quads fail. Not a conversion.
Should I use IPv4 Integer instead of Private IPv4?: Use Private IPv4 when you need RFC1918, loopback, or link-local flag. Use IPv4 Integer when you need Convert IPv4 ↔ integer (decimal or hex). They share a category (Network) but not the same job.
What are the limits of Private IPv4?: RFC1918, loopback, link-local. Invalid quads fail. Not a conversion. Also: Flags 10/8, 172.16/12, 192.168/16, 127/8, and 169.254/16. Unlike IPv4 Integer this is not a conversion. Unlike IPv4 in CIDR you do not type a prefix. Invalid dotted quads fail. Local only.