A directory of free, no-sign-up online tools — including our sister sites and other utilities we find genuinely useful.
Decode percent-encoded URLs or encode strings for use in query parameters. With UTF-8 support, recursive decoding, and 50+ charsets.
Encode binary data to Base64 or decode Base64 strings. Includes URL-safe variant and binary file support.
Format, validate, minify, and analyze JSON. With JSONPath query and TypeScript interface generation.
Generate UUIDs (v1, v4, v7) in bulk with copy-and-paste output. With validation and version detection.
MD5, SHA-1, SHA-256, SHA-512 and more. Works on text and files. Runs in your browser.
Check the strength of a password without sending it to a server. With entropy calculation and crack-time estimates.
Convert Unix timestamps to human-readable dates and back. Supports seconds, milliseconds, and microseconds.
Count words, characters, sentences, paragraphs, and reading time. With keyword density analysis.
Calculate area for rooms, lots, and projects. Multiple shapes including L-shaped rooms and circles.
Exact age in years, months, days, hours. From birth date to any reference date, with timezone support.