All Tools
Every tool runs locally in your browser. Nothing is uploaded, nothing is stored.
- PStTG Sales Tracker - Monitor the 30-item & €2,000 threshold for online marketplace sales.
- Small Business VAT Threshold Check (§ 19 UStG) - Check the €25,000 small business VAT threshold under § 19 UStG.
- Late Payment Interest Calculator - Calculate statutory default interest and €40 late payment fees.
- Financial Calculator Bundle - Compound interest, loan amortization, savings plan and inflation suite.
- Internet Speed Test - Measure internet download bandwidth, upload speed and latency.
- Email Header Analyzer - Inspect raw email headers for SPF, DKIM, DMARC and routing hops.
- EXIF Metadata Remover - Strip hidden EXIF metadata and GPS geolocations from JPG/PNG images.
- Diceware Password Generator - Generate memorable passphrases from a 7,776-word Diceware list.
- Base64 Encoder & Decoder - Encode and decode strings or files to Base64 data URIs client-side.
- Unix Epoch Timestamp Converter - Convert Unix epoch timestamps to human-readable ISO dates.
- RegEx Tester & Live Matcher - Test, debug, and optimize regular expressions with syntax highlighting.
- Color Palette Generator & WCAG Checker - Create harmonious color schemes and verify WCAG contrast ratios.
- Favicon Generator & ICO Converter - Generate scaled ICO, PNG & Apple Touch Icons from images.
- JSON Formatter, Validator & Minifier - Format, validate and minify complex JSON payloads with interactive tree.
- Flooring Calculator (Hardwood & Laminate) - Calculate exact square footage, cutting waste and flooring boxes needed.
- Concrete & Foundation Estimator - Calculate exact concrete volume (m³), weight and pre-mix bags.
- Inflation & Purchasing Power Calculator - Calculate historical purchasing power erosion and CPI inflation rates.
- Deutsche Mark Converter - Convert Deutsche Mark to euros — exchange rate and real purchasing power.
- Ideal Weight Calculator (BMI) - Calculate healthy weight ranges using BMI, Broca & Creff formulas.