Free tools, right in your browser.
All tools
Calc Tools
Free calculators in your browser: VAT, percentage, discount, compound interest, loan, margin, hourly wage and dates. No sign-up, nothing is sent anywhere.
Dev Tools
Free developer tools in your browser: JSON formatter, Base64, URL encoding, hashes, UUID, JWT decoder, Unix timestamp and colors. No sign-up, nothing is sent.
E-Invoice Tools
Open, read and check XRechnung and ZUGFeRD e-invoices – and create them yourself. Everything runs locally in your browser, nothing is uploaded.
QR Code Generator
Create custom QR codes with your own colors, transparent background and logo. Free, no sign-up, download directly in your browser as PNG, JPEG, WebP or SVG.
