Utilities

Find meeting windows where 2–6 participants across time zones are all working. Computes UTC intersection, ranks by comfort, exports .ics.

Games

Classic memory matching game. Flip cards two at a time to find matching pairs; tracks moves and time, then grades you. Easy / standard / hard grids, emoji or number card faces.

Media

Extract audio/video metadata as JSON with ffprobe.

Games

Classic minesweeper with beginner, intermediate and expert presets, or custom boards. First click safe, flood-fill, right-click flags, chord on numbers.

Data Visualization

Turn an indented list into a mind map with hierarchical branches

Text Processing

Mirror text by swapping mirrored symbols (brackets, quotes, arrows, slashes) and reversing the string. Note: Unicode has no mirrored letter glyphs, so letters stay as-is. Plain Unicode text, no font needed.

Science & Education

Build a Punnett square for a Mendelian cross and auto-calculate genotype and phenotype ratios. Supports complete dominance, incomplete dominance (blending), codominance, and X-linked (sex-linked) inheritance — with each offspring cell's sex marked for X-linked crosses.

Validation

Validate or generate numbers using the Modulus-11 (ISO 7064) check-digit algorithm with ISBN-10 (10..2), Norwegian-ID (3,7,6,1,8,9,4,5,2) and generic 2-7 weight schemes.

Security

Generate or validate 12 to 24 word BIP39 mnemonic phrases with entropy and PBKDF2-HMAC-SHA512 seed output

Math & Numbers

Convert millimeters of mercury to kilopascals with configurable decimal precision

Math & Numbers

Convert megabytes to bytes with decimal vs binary interpretation, alternate-system comparison, and network-speed-aware transfer estimates

Math & Numbers

Convert megabytes to mebibytes with decimal vs binary interpretation, alternate-system comparison, and network-speed-aware transfer estimates