Test IP Address Generator — Dummy IPs for Fixtures

Generate synthetic IPv4/IPv6 strings for databases, log fixtures, and parser QA — documentation ranges by default, optional invalid corpus. Not geolocation, not a converter, not a scanner.

Loading…
Test IPs — developer notes
Documentation-range dummy IPv4/IPv6 strings for fixtures and parser QA. Default pools are RFC 5737 / RFC 3849. Not geolocation, not a converter, not a scanner.

How generation works

Pick a quantity (1–100), IP version, range, validity, format, optional :port suffix, and order. Changing an option refreshes the list immediately. Copy all or download JSON, CSV, SQL, or TXT.

Options

Quantity (1–100)
How many IP strings to emit for seed jobs. Capped at 100.
Version
IPv4 only, IPv6 only, or mixed (fair coin per row). Decimal and binary formats are IPv4-only.
Range
Documentation (RFC 5737 / 2001:db8) by default, plus private, loopback, link-local, multicast, or a custom CIDR you own. No public-random routable preset.
Validity
Valid rows stay inside the selected pool. Invalid mode reveals malformed corpus kinds for negative parser tests only.
Format
Plain address, CIDR with default prefix, IPv4 uint32 decimal, or dotted binary. Invalid rows snap decimal/binary to address.
Include port
Append :port with a uniform random port from 1024–65535 for combined log tokens such as remote_addr fixtures.
Order
Random with replacement, unique without replacement, or sequential walk. Small pools (for example ::1) error when count exceeds usable hosts.

Examples

Default documentation IPv4

Settings

version=ipv4, range=documentation, validity=valid, format=address

Sample output

192.0.2.14

Invalid overflow octet

Settings

validity=invalid, invalidKind=overflowOctet

Sample output

256.0.0.1

Related tools

Need MAC fixtures, ports, or a JSON table? Try the test MAC address generator, test numeric generator, and JSON test data generator. To convert or plan a known address, use the IP address converter or subnet calculator.

Test IP FAQ

Fixtures, documentation ranges, and what this tool is not

Why documentation ranges like 192.0.2.x?

RFC 5737 and RFC 3849 reserve TEST-NET and 2001:db8:: for examples and fixtures so generated strings do not target real networks by default.

I searched for a random ip generator. Is this it?

If you need dummy IP strings for fixtures and parser QA, yes. We do not mint random public routable IPv4. Use documentation or private presets, or a subnet you own.

I searched for a fake ip generator. Is this it?

Yes for synthetic fixture strings. No for geolocation, WHOIS, or impersonating real users — this is not an ip lookup and does not show where an address lives.

Is this an IP lookup or geolocation tool?

No. It generates strings locally. It does not answer what is my IP, country, or ASN. Use documentation defaults and treat output as fixtures only.

Can I calculate subnets or convert formats here?

No subnet calculator math in v1. Paste a known address into the subnet calculator or ip-address-converter AlsoLinks when you need transform/plan jobs.

Test Data

Synthetic field values for fixtures and DB seed — reserved-range phone numbers first.

JSON Test Data Generator

Explore other tool categories

Minify

Shrink code and assets for production — minify JavaScript, CSS, HTML, JSON and XML before gzip or CDN deploy.

Unminify

Expand minified or compressed code — unminify JavaScript, CSS, TypeScript, SCSS, LESS, SQL, YAML and other formats when debugging or reviewing.

Conversion

Transform data between JSON, YAML, XML and CSV locally — no server uploads.

Encoding

Encode or decode Base64, URL components and HTML entities — client-side only.

Serialization

Serialize and deserialize PHP data structures beside JSON workflows.

JSON Tools

Validate, format, diff and explore JSON payloads — complementary to minifiers and converters.

SVG Tools

Preview, optimize with SVGO, export Data URI, resize, beautify, convert to JSX and validate SVG — all in your browser.

Beautify

Make code readable with consistent indentation — beautify JavaScript, CSS, TypeScript, SCSS, LESS, Markdown, GraphQL, SQL, YAML and more in your browser.

CSS preprocessors

Compile SCSS or LESS to standard CSS in the browser — pair with beautify or minify for a full stylesheet workflow.

Color & CSS Tools

Paste-local WCAG contrast checking with modern CSS color syntax — pair and matrix views, never uploaded.

DevOps & Infra

Terraform HCL format/validate/minify, Dockerfile format & lint, Docker Compose and .env validation.

CI/CD

GitHub Actions and GitLab CI — format YAML and check workflow/job structure in your browser.

Logs & observability

Line-oriented JSON/NDJSON and Nginx/Apache access logs — format, filter, validate, and CSV/TSV.

Kubernetes

Multi-doc manifests, structural validate, Ingress/Deployment starters, and Helm values formatting.

Networking / IP

CIDR, subnets, and IPv4/IPv6 helpers — in your browser.

Security & tokens

JWKS, X.509 certificates, and secrets scan — browser-local.

API & schemas

OpenAPI tools to format, validate, and lint your specs.

HTTP Tools

Paste-local cURL, HTTP messages, URLs, HAR files, and Cookie / Set-Cookie headers — format and inspect in your browser, never sent.

SEO / Web Tools

Generate meta tags, Open Graph, and Twitter Card output locally — previews simulated from your inputs, never fetched from your live site.

Developer utilities

Timestamps, UUID, ULID, Nanoid, cron, passwords, regex, slugify, number bases, case, text diff, and chmod — all client-side.

Text & Markdown

Count words, build Markdown TOCs, and clean line lists — all in your browser.

AI & LLM

Token counting, pricing estimates, and context-window fit — 100% browser-local.