Tools

14 tools online. More tools are added in the next days.

• Unix timestamp converter

  Unix timestamp converter with 16 readings: Unix, ISO 8601 and 12 calendar/date notations - Julian Day, Mayan, Hijri, Thai Buddhist, Ethiopian, Indian Saka and more. Y2038 warning. Local in your browser.

  May 6, 2026

• Color converter

  Color converter for 6 spaces at once: HEX, RGB, HSL, OKLCH, LAB, Display-P3. With OKLCH lightness rotator and live WCAG meter. Local in your browser.

  May 5, 2026

• Percentage calculator

  Percentage calculator with 6 modes - including percentage points vs percent and asymmetric loss-recovery. Live visualisation per mode, in your browser.

  May 4, 2026

• Large numbers

  One number, nine notations: English long form, Indian lakh and crore, Japanese 万, scientific notation, log scale to googol, plus an SI prefix chart up to quetta. BigInt pipeline up to 10^200. Runs in your browser.

  May 3, 2026

• UUID generator

  UUID generator with a per-version layout diagram: v1, v3, v4, v5, v7 and ULID. v7 is sortable, v4 is random, v3/v5 are deterministic. All in your browser.

  May 2, 2026

• Base64 Encoder

  Base64 step by step: 3-byte groups as chips, 4-character blocks beside them, padding and URL-safe variant explained. Encode and decode in the browser.

  May 1, 2026

• Working Days Calculator

  Working days calculator for Germany, 2025 to 2027. Pick a federal state, plan vacation directly in the 12-month grid, find the strongest bridge days. Result drops into the hourly rate calculator.

  Apr 29, 2026

• JSON Formatter

  JSON formatter, validator and sorter. Type chips for every field, tree view, caret-pointed error card with common-cause list. Your inputs stay in the browser.

  Apr 28, 2026

• QR Code Generator

  QR code generator with capacity chips. Bytes, version, EC level and WCAG contrast in one view. Four modes (text, URL, vCard, Wi-Fi). Local, no account.

  Apr 27, 2026

• Password Generator

  Password generator with entropy explained. Length and charset size determine the bits, and the bits drive the strength label. Weak-password alert with one-click fix. Local, no account.

  Apr 26, 2026

• URL Encoder

  URL encoding step by step: every %-code colour-coded and explained, double-encoding alert, encode and decode in the browser.

  Apr 24, 2026

• VAT Calculator

  German VAT calculator. 19 or 7 percent, gross-to-net or net-to-gross, quick reference for reduced-rate goods, custom EU rate. Runs in browser, no signup.

  Apr 23, 2026

• Germany Net Salary Calculator

  Germany gross-to-net salary calculator 2026. Income tax, Soli, health and pension contributions. Tax-class comparison, runs in browser, no signup.

  Apr 19, 2026

• Hourly Rate Calculator

  Calculate a freelancer hourly rate with target income, working days, overhead, and utilisation. DACH defaults, runs in your browser, no signup.

  Apr 18, 2026