COMPUTER SCIENCE & DATA
Programming
Binary-Hex-Decimal Converter
Convert between binary, octal, decimal and hexadecimal at any length, see signed and unsigned bit patterns, and follow the conversion step by step.
Checksum Generator
Generate SHA-256, SHA-512, SHA-1, MD5 and CRC-32 checksums of text or files in your browser, and verify a download against a published checksum.
Regex Tester
Test JavaScript regular expressions online: highlighted matches, numbered and named capture groups, flags and a find-and-replace preview.