Toolflux

Toolflux is a collection of free browser tools for developers and freelancers. It is built around small utilities that handle focused tasks directly in the browser, with no signup required and a stated emphasis on keeping data with the user. The site also describes the tools as fast and focused, and says there are 35 tools live with new ones added weekly.

The cataloged tools span several groups. Developer tools include JSON, Base64, Markdown, diff, and crontab utilities, alongside a JSON formatter, Base64 encoder, Markdown to HTML converter, diff checker, crontab generator, and related converters. The DACH-specific section is aimed at freelancers and self-employed users in Germany and includes hourly rate, net salary, VAT, and working days calculators. Other listed tools cover calculators and converters, such as aspect ratio, color, time zone, percentage, Roman numerals, tip, large numbers, and lorem ipsum generation.

Several individual tools are described in more detail. The compound interest calculator can work out a final amount and interest for a lump sum or monthly savings plan, and includes a year-by-year chart, a time-to-target answer, and a German tax and inflation view. The date calculator combines six modes in one tool: days between dates, human-readable duration, add or subtract, age, countdown, and German working days. The ETF calculator projects a lump-sum investment or ETF savings plan and shows real TER drag in euros, with optional German Vorabpauschale tax for an after-tax estimate. The barcode generator recommends EAN-13, ISBN-13, Code 128, or ITF-14, shows check-digit derivation, and flags whether the code still scans once printed. Geometry tools cover angular shapes and round shapes, with calculations for triangles, circles, cylinders, cones, spheres, prisms, and pyramids.

Toolflux is presented as a browser-based service, and the page says all tools run in the browser. The site also states that the tools are free. It does not identify any separate desktop app or installation step, and the page uses the label developers & freelancers to describe the intended audience.