Free UK Developer Tools

15 free tools for generating and checking UK test data.

• UK Random Address Generator — Generate realistic random UK addresses with real postcode districts, post towns, counties and Royal Mail formatting.
• Random UK Postcode Generator — Generate structurally valid UK postcodes built on real Royal Mail districts, filtered by country, town or postcode area.
• UK Postcode Lookup — Look up a postcode, outward code, postcode area or post town to see its district, county, country and dialling code.
• UK Address & Postcode Validator — Check a UK address against Royal Mail formatting rules and validate the postcode structure, area, district and sector.
• Random UK Town & City Generator — Pick random UK towns and cities with their post town, county, country, postcode areas and dialling code.
• Random UK County Generator — Random English ceremonial counties, Scottish council areas, Welsh preserved counties and Northern Irish counties.
• UK Phone Number Generator — Generate UK landline and mobile numbers from the ranges Ofcom reserves for drama, so no number can reach a real subscriber.
• UK Name & Persona Generator — Generate fictional British personas with names, job titles, usernames and example.com email addresses.
• UK Company Name Generator — Create fictional UK company names with Ltd, PLC and LLP suffixes plus structurally valid company and VAT number formats.
• Random Username Generator — Generate clean, unique usernames for test accounts, seed data and staging environments.
• Secure Password Generator — Cryptographically secure password generator with custom length and character pools.
• UUID v4 Generator — Generate RFC 4122 version 4 UUIDs in bulk for database keys and API test fixtures.
• Lorem Ipsum Text Generator — Generate placeholder paragraphs and sentences for UI mock-ups and content layouts.
• QR Code Generator — Generate high-resolution QR codes for URLs, contact details, Wi-Fi credentials and plain text.
• Random Number Generator — Generate random integers across a custom range, with optional uniqueness and instant statistics.