Checksums

Generate, verify, and check European IBAN numbers by country with local browser processing and clear format feedback.

generatevalidateibanen

Generate EU VAT numbers for test data and validate country-specific VAT formats, prefixes, and checksum rules.

generatevattaxen

Generate, calculate, and validate Italian codice fiscale values for testing, onboarding forms, and fiscal-code demos.

generatetaxcodeen

Validate HTML, XML, SVG, YAML, JSON, and CSV content with fast browser-based syntax and structure checks.

validvalidatevalidatoren

Translate between text characters and their ASCII numeric codes

asciicodeencodeen

Encrypt and decrypt messages using the most commonly used encryption algorithms

encryptalgorithmAESen

Validate identifier checksums such as Luhn cards and MOD-97 IBAN keys. Free online tool in your browser on Tool Plaza. On Tool Plaza.