Identifiers & Validation
28 tools available. All calculations and file processing stay 100% private in your browser.
Convert 9
- ISBN-10 to ISBN-13 ConverterConvert legacy 10-digit ISBNs into modern 13-digit Bookland EANs by adding 978 prefix and recalculating check digits.
- Unix Permission Numeric to Symbolic (e.g. 755 → rwxr-xr-x)Convert octal numeric Unix permissions (e.g. 755, 644, 600) into 9-character symbolic notation (e.g. rwxr-xr-x).
- Unix Permission Symbolic to Numeric (e.g. rwxr-xr-x → 755)Convert 9-character rwx symbolic permission strings into 3-digit octal numeric modes.
- UUID Structure Decoder & Byte InspectorInspect internal version bits, RFC variant specification, and 16 raw byte values of any UUID.
- UUID to 128-bit Binary String ConverterRender a 128-bit UUID as a full 128-character sequence of binary ones and zeros.
- UUID to 128-bit Decimal Integer ConverterConvert a 128-bit UUID into its full, exact unsigned decimal integer representation.
Create 9
- GUID Generator (Microsoft Style Uppercase)Generate uppercase, curly-brace compatible Microsoft Globally Unique Identifiers (GUIDs).
- KSUID Generator (K-Sortable Globally Unique ID)Generate 27-character K-Sortable unique identifiers with 4-byte 1-second timestamp resolution and 16 bytes of random entropy.
- Max UUID Generator (All Ones / FFs)Output the standard RFC 9562 Max UUID composed entirely of one bits (ffffffff-ffff-ffff-ffff-ffffffffffff).
- Nil UUID Generator (All Zeros)Output the standard RFC 9562 Nil UUID composed entirely of zero bits (00000000-0000-0000-0000-000000000000).
- UUID v1 Generator (Timestamp & Node)Generate RFC 9562 Version 1 time-based UUIDs incorporating 60-bit Gregorian timestamps and node MAC addresses.
- UUID v3 Generator (MD5 Namespace)Generate deterministic RFC 9562 Version 3 UUIDs using MD5 hashing of a namespace UUID and name string.
Calculate & Analyze 1
Inspect & Extract 9
- BIC / SWIFT Code ValidatorValidate ISO 9362 Business Identifier Codes (BIC / SWIFT) for 8-character head office and 11-character branch formats.
- Email Address Syntax Validator (RFC 5322)Verify syntactic validity of email addresses against RFC 5322 standards locally without sending test emails.
- IBAN Validator (International Bank Account Number)Validate International Bank Account Numbers (IBAN) with country code length checks and MOD-97-10 checksum calculation.
- IMEI (Mobile Equipment Identity) ValidatorValidate 15-digit International Mobile Equipment Identity numbers for smartphones and cellular devices using the Luhn algorithm.
- ISBN-10 Book Number ValidatorValidate legacy 10-digit International Standard Book Numbers with weighted modulo 11 check digit computation.
- ISBN-13 Book Number ValidatorValidate modern 13-digit International Standard Book Numbers (978/979 prefixes) with GS1 modulo 10 checksums.