Programming
Programming tools for UUID/GUID generation, HEX/RGB/HSL conversion, Unix timestamps, MongoDB ObjectIds, Base64, JSON, hashes, checksums, and file-size conversion.
Base64 Encoder/Decoder
Encode and decode Base64, including UTF-8, URL-safe alphabet, and MIME wrap.
Color Converter
Convert colors between HEX, RGB, and HSL, then copy CSS-ready values.
File Checksum
Hash a local file to SHA-256, MD5, SHA-1, SHA-384, or SHA-512 and compare it to an expected digest.
File Size Converter
Convert bytes, KB, KiB, MB, GB, and TB (SI 1000 vs IEC 1024), including why a 1 TB drive shows as 931 GiB.
Hash Generator
Hash text to MD5, SHA-1, SHA-256, SHA-384, or SHA-512, with optional HMAC and a paste-to-compare check.
JSON Formatter/Validator
Pretty-print, minify, and validate JSON — catch syntax errors with line and column, then copy or download.
MongoDB ObjectId Converter
Convert a MongoDB ObjectId to a Unix timestamp, or mint an ObjectId from a date.
Unix Timestamp Converter
Convert Unix epoch seconds or milliseconds to UTC and local dates, or pick a date and copy a timestamp.
UUID Generator
Generate UUID v4 and time-ordered UUID v7 (GUIDs), then bulk-copy or validate.