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A growing collection of fast, privacy-friendly utilities and calculators. No sign-up, no clutter.
Fast, privacy-friendly utilities for developers: format, encode and generate in seconds.
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text, right in your browser.
Convert colors between HEX, RGB and HSL with a live preview.
Convert Unix timestamps to human dates and back — UTC, local, ISO 8601 and relative time. Seconds and milliseconds are auto-detected.
Percent-encode and decode URLs and URL components, UTF-8 safe.
Convert JSON to CSV and CSV back to JSON, both ways. Choose the delimiter, handle quoted fields, and copy the result. Everything runs in your browser.
Convert YAML to JSON and JSON back to YAML, both ways. Validates as it converts and shows clear errors. Everything runs in your browser.
Format, beautify and validate JSON online with clear error messages for invalid input.
Encode text to Base64 or decode Base64 back to text. UTF-8 safe with automatic direction detection.
Generate 5 random RFC 4122 version 4 UUIDs at once. The input is ignored; run again for a new batch.
Analyse and transform text in seconds.
German online calculators for salary, taxes and VAT.
Calculate your German net salary with the official 2025 & 2026 payroll-tax algorithm: tax class, Bundesland, church tax, children and public or private insurance.
Calculate VAT for Germany (19/7 %), Austria (20/13/10 %) and Switzerland (8.1/2.6/3.8 %), both ways: add VAT to a net amount or remove it from a gross amount.
Estimate German Elterngeld: Basiselterngeld and ElterngeldPlus, with the sibling bonus and multiple-birth bonus, based on your net income before birth.
Estimate your German statutory pension from your salary and contribution years using the official pension formula, including early or later retirement and health and care insurance.
Project how savings or an ETF plan grow with compound interest. Set a starting amount, monthly contribution, return and duration, and watch the balance grow year by year.
Calculate the monthly payment, total interest and effective APR for an annuity loan or credit. Includes an optional fee and a year-by-year repayment chart.
Handy little tools for everyday tasks.
A simple tap counter. Count up or down with one tap — great for reps, people, stitches or inventory.
Generate strong, random passwords with full control over length and character types. Everything happens in your browser.
Create a QR code from any text or URL. Choose the error correction, colors and quiet zone, then download it as PNG or SVG. Everything runs in your browser.
Calculate your Body Mass Index from weight and height in metric or imperial units. See your WHO category, your healthy weight range and an age-based reference.
Estimate your daily protein needs from your body weight and goal, from general health to building muscle or losing fat. Metric and imperial units.
Work out the days between two dates, or add and subtract days, weeks, months and years from a date. Shows the duration, total days and the weekday.
Estimate your daily calorie needs (BMR and TDEE) from your sex, age, height, weight and activity level, with targets for losing, maintaining or gaining weight.
Work out percentages six ways: a percent of a value, what percent one number is of another, the base behind a percent, percentage change, increase or decrease, and percentage difference.
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