Math & Numbers

Calculate the Rankine active earth pressure on a smooth vertical wall backfilled with cohesionless soil. K_a = tan²(45°−φ/2). Optional uniform surcharge q. Returns the base pressure p₀, the total force P, and the resultant height.

AI Tools

Generate up to 10 creative domain names with AI and filter out already-registered ones via DNS + RDAP.

Games

Classic 2048. Arrow keys or swipe to slide and merge equal numbers. Each valid move spawns a tile; score accumulates from merges. 4×4 / 5×5 / 6×6 boards, pick a goal tile.

Data Analysis

Compute conversion-rate or mean differences, 95%/99% confidence intervals, two-sided p-values (Z-test for proportions, Welch t for continuous metrics), lift, sample size for 80%/90% power, recommended experiment days, plus sequential-testing and Bonferroni multiple-comparison warnings.

Games

Narrow Wordle answers from ~12,000 five-letter English words using green/yellow/gray clues, ranked by word frequency. Tighten constraints round-by-round in the browser.

Text Processing

Turn a phrase into an acronym or initialism. Choose contributing words, which letter(s) to take, the separator, and the case.

Text Processing

Unscramble letters into every valid English word. A Scrabble/anagram solver that respects letter counts and filters by length.

Text Processing

Convert English number-words into digits. Handles magnitudes, "and", decimals via "point", and hyphens, replacing the number-run in place.

Geography

Geocode an address into normalized place details, latitude, and longitude coordinates

Format Conversion

Format, beautify and minify XML with configurable indent. Preserves comments and CDATA

Format Conversion

Escape and unescape XML special characters (& < > " ') with optional numeric references, slash escaping, and CDATA wrapping

Security

Encrypt or decrypt portable password-based file bundles with Argon2id, XChaCha20-Poly1305, and optional signatures