Generate random IPv4 and IPv6 addresses for network testing, development, and security research. Code never leaves your device — formatting and validation run locally in your browser.
Content reviewed October 2026 · About Toolzum
Generate dummy placeholder text at a specified character length for design mockups, UI prototypes, and content layout testing. Code never leaves your device — formatting and validation run locally in your browser.
Expand an IP address range into a list of individual addresses. Useful for network planning and firewall rules. Code never leaves your device — formatting and validation run locally in your browser.
Generate random TCP/UDP port numbers from well-known, registered, or dynamic ranges. Useful for network testing, Docker port mapping, and firewall configuration.
Generate random MAC addresses for labs and testing — pure random hex, no OUI or unicast-bit management. Fill virtual networks credibly — local generation, free, no signup.
Generates random integers within a user-defined min-max range with optional unique and sorted output. Uses the browser random number generator — fine for games, raffles, and sampling, not for security secrets. Input never leaves your device — everything runs locally in your browser.
Both IPv4 (e.g., 192.168.1.1) and IPv6 (e.g., 2001:db8::1) addresses are generated. Pick one version per batch via the toggle.
No — the tool offers an IPv4/IPv6 toggle and a count slider (up to 20) only, with presets for 5 or 10 IPv4 and 5 IPv6. IPv4 draws use first octet 1–223 and last octet 1–254; there is no CIDR-prefix or first-octet picker.
Network testing, firewall rule testing, penetration testing, load balancer configuration, and development environments that need diverse IP inputs.
There is no private-only or loopback filter — addresses draw randomly across the full range, so 10.x.x.x or 127.x.x.x appear only by chance. Regenerate the batch until the mix suits the test.
Yes. All generation runs in your browser. No data is transmitted.
Random Token Generator
Generate random tokens in hex, base64, or alphanumeric formats for secrets and sessions. Hex and base64 draw from Web Crypto (alphanumeric uses Math.random — see format notes). The API-key preset mints 64-char secrets in one click — local generation, free, no signup.
IPv6 ULA Generator
Generate Unique Local Addresses for private IPv6 networks — random 40-bit global IDs in fc00::/7 space, no coordination needed.