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Clean up and validate postal codes for 28 countries: fix case and spacing (sw1a1aa → SW1A 1AA), add ZIP+4 hyphens, and flag bad formats.
Also covers: ZIP code formatter · Postcode validator
The result appears here as you type.
The official layout is shown next to the menu: SW1A 1AA for the UK, K1A 0B1 for Canada, 90210-1234 for US ZIP+4, 100-0001 for Japan.
One per line. Lowercase letters, missing or extra spaces, hyphens, and dots are all corrected.
Codes that don't match the country's format are marked so you can fix them, or you can keep or remove them.
No. It checks the format: the right mix of letters and digits in the right places, including rules like the letters Canada and the UK never use. Confirming that a code is in use needs the postal service's address database.
Formats overlap: 10115 is a valid postal code in Germany, the US, France, and many others. The country decides which format to check and how to lay it out.
Australia, Austria, Belgium, Brazil, Canada, China, Denmark, France, Germany, India, Ireland (Eircode), Italy, Japan, Mexico, the Netherlands, New Zealand, Norway, Pakistan, Poland, Portugal, Singapore, South Africa, South Korea, Spain, Sweden, Switzerland, the UK, and the US.
No. Everything runs in your browser, and nothing you paste is sent to a server or stored.
Text & code
Compare two texts or code files side by side, with changed words highlighted. Ignore whitespace or case, and export a unified .diff patch that git apply accepts.
Count
Count words, characters, sentences, paragraphs, and lines as you type, with reading and speaking time. Check text against X, SEO title, and meta description limits.
Case
Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, PascalCase, snake_case, kebab-case, and more, line by line.
Cleanup
Clean up messy text: remove extra spaces, blank lines, invisible characters, and HTML tags, straighten quotes, and rejoin hard-wrapped lines.
Lines
Delete repeated lines from a list and keep the original order. Choose case sensitivity, whether to ignore surrounding spaces, and whether to keep the first or last copy.
Lines
Delete blank lines from text, or collapse runs of blank lines down to one so paragraphs stay separated.