IP & CIDR List Validator
Validate and normalise lists of IPv4, IPv6 and CIDR entries offline.
IP / CIDR list
Validation results — 4 valid, 2 invalid, of 6 total
| Input | Type | Normalized / note |
|---|---|---|
| 192.168.1.1 | IPv4 | 192.168.1.1 |
| 10.0.0.0/8 | CIDR (IPv4) | 10.0.0.0/8 |
| 2001:db8::1 | IPv6 | 2001:db8::1 |
| ::1/128 | CIDR (IPv6) | ::1/128 |
| 999.1.1.1 | Invalid | not a valid IP or CIDR |
| not-an-ip | Invalid | not a valid IP or CIDR |
About the IP & CIDR List Validator
Paste a list of IP addresses and CIDR blocks to validate each entry, normalise its format, flag private or reserved ranges and export a clean list.
Examples
Example
192.168.001.1/24Output
192.168.1.0/24 (private)Keyboard shortcuts
- Copy the main outputCtrl / ⌘ + Shift + C
- Download the resultCtrl / ⌘ + S
- Share this toolCtrl / ⌘ + Shift + S
- Reset the inputsAlt + R
- Open the tool search paletteCtrl / ⌘ + K
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Frequently asked questions
Version 1.0.0 · Updated 2026-08-09 · Runs entirely in your browser