How to Generate Random IP Addresses (IPv4 & IPv6)

To generate random IP addresses, open the ByteTools Random IP Generator, choose IPv4 or IPv6, optionally limit IPv4 to private ranges, set how many you want, click Generate, and copy the list. Every address is built locally in your browser, so you get correctly formatted, plausible test data in seconds with nothing uploaded.

This tutorial covers each step, explains the version and private-range options, and shows how to drop the output straight into your tests or docs.

What the random IP generator does

The tool produces valid-looking IPv4 addresses (like 203.0.113.5) and IPv6 addresses (like 2001:db8::1) for testing, demos and sample data. A private-range switch keeps IPv4 output inside the internal blocks used on home and office networks — 10.x, 172.16–31.x and 192.168.x — so nothing points at a real public host. It is built for developers, QA engineers and trainers who need realistic placeholder addresses without borrowing real ones.

Step-by-step tutorial

1. Choose the IP version. Select IPv4, IPv6, or both depending on what your system under test expects.
2. Toggle private ranges (IPv4). Tick "Private ranges only" when you want internal-style addresses that will never route on the public internet.
3. Set the count. Enter how many addresses you need — one for a quick check, or a large batch to seed a database or log file.
4. Click Generate. The tool builds the list instantly using the browser's cryptographically secure random source.
5. Copy the list. Grab the full output with one click and paste it into your fixtures, spreadsheets or documentation.

Choosing version and range options

The two settings that shape your output are version and the private-range toggle. Use the table to pick quickly.

If your application must handle both protocols, generating both at once gives you a realistic dual-stack dataset in one step.

Why generate IPs in the browser

Running locally means the tool is fast even for large lists and never sends your generated data anywhere — useful on locked-down work machines and offline. It also removes the temptation to hand-type addresses, which often produces invalid octets or malformed IPv6 groups. Because picks use crypto.getRandomValues, the spread is genuinely random rather than clustered. Remember these are sample values: an address may coincidentally match a real host, so never send live traffic to a randomly generated public IP.

Try the Random IP Generator — free and 100% in your browser.

FAQ

Should I use IPv4 or IPv6 for my test?

Match whatever your application accepts. If it stores or parses both, generate both to make sure your code handles the longer IPv6 format as well as classic IPv4.

When should I turn on private ranges?

Enable it whenever the addresses represent devices on an internal network, or when you want to guarantee the output can never match a routable public host.

Can I generate a large batch at once?

Yes. Set a high count and generate the whole list in one click. Local processing keeps it fast, and nothing about the addresses is logged.

Are these addresses safe to publish in documentation?

For docs, prefer private ranges or the reserved documentation blocks so readers cannot accidentally reach a live system. Treat all output as sample data only.

Related free tools

• MAC Address Generator — matching hardware addresses for network fixtures.
• UUID Generator — unique IDs for seeding records.
• Random Number Generator — random numeric values for tests.
• Random String Generator — random strings for test data.

Built by ByteVancer

ByteTools is a free product of ByteVancer, a software and web development studio building web apps, SaaS and custom software. If these developer-friendly, private tools fit your stack, explore what ByteVancer can build for your team.