Test Postal Code Generator — Dummy ZIP / Postcodes for Fixtures

Generate prefix-valid postal codes for checkout tax, shipping zones, and regex fixtures. Codes may be assigned; use only in non-production. Not for mail, geo-restriction bypass, or DPV certification.

Loading…
Test postal codes — developer notes
Prefix-valid postal / ZIP / postcode strings for checkout tax, shipping zones, and regex fixtures. Codes may be assigned. Not a street address or DPV corpus.

How generation works

Pick a quantity (1–100), country, region, format, and (for US) sales-tax mode. Changing an option refreshes the list immediately. Copy all (postal codes) or download JSON, CSV, SQL, or TXT.

Options

Quantity (1–100)
How many unique postal codes to emit for seed jobs. Capped at 100.
Country
Selects format mask and prefix alphabet. US ZIP, CA A#A #A#, GB outward/inward, FR five-digit CP, DE PLZ, SE ### ##, AU four-digit postcode.
Region
Constrains the prefix pool (US state, CA province, GB area, FR department, DE/SE zone digit, AU state). any samples uniformly across regions.
Format
national keeps display separators; compact strips them on CA, GB, and SE; zipPlus4 is US-only #####-#### with add-on 0001–9999.
US sales tax
Shown only when country is US. noStateSalesTax limits prefixes to Alaska, Delaware, Montana, New Hampshire, and Oregon.

Examples

US checkout ZIP

Settings

country=US, region=any, format=national

Sample output

94107

GB compact postcode

Settings

country=GB, region=england, format=compact

Sample output

SW1A1AA

Related tools

Need a full street line? Try the test address generator. Pair with company, username, name, email, or phone columns? Try the test company name generator, test username generator, test name generator, test email generator, or test phone number generator. Also: UUID generator or Lorem Ipsum generator.

Test postal code FAQ

Fixtures, honesty, and what this tool is not

Can these postal codes be real assigned codes?

Yes. Prefix-valid generation often matches assigned postcodes. Use them only as synthetic fixtures in non-production. This tool does not check PAF, CASS, DPV, or registry membership.

Is this a fake address or fake ZIP generator?

If you searched for a fake zip code generator, this page emits one-column postal_code strings for fixtures — not a full address, city line, or identity pack.

Does it output street, city, or lat/long?

No. This page generates postal codes only. For street, city, and unit, use the test address generator — it imports this postal engine. This page still does not emit lat/long.

Are 00000 or reserved test ZIPs used?

No. The engine never emits all-zero codes and does not claim USPS, Royal Mail, or La Poste reserved fiction blocks.

Test Data

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

Test Name Generator

Test Email Generator

Test Username Generator

Test Phone Number Generator

Test Date Generator

Test Numeric Generator

Test URL Generator

Test Company Name Generator

Test Address Generator

JSON Test Data Generator

CSV Test Data Generator

SQL Test Data Generator

Test Credit Card Generator

Test IBAN 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.

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.