Base32 Encoder / Decoder
Encode and decode text to Base32 (RFC 4648) – e.g. for TOTP secrets and URLs. Runs entirely in the browser.
Encode and decode text to Base32 (RFC 4648) – e.g. for TOTP secrets and URLs. Runs entirely in the browser.
Encrypt and decrypt text with ROT13 or a Caesar shift – freely choosable shift. Runs entirely in the browser.
Calculate the monthly loan payment – from loan amount, interest rate and term, including total cost and interest. Runs in the browser.
Calculate body mass index – from height and weight, with classification (under/normal/overweight) and ideal weight. In the browser.
Convert units – length, weight, area and temperature. Metric and imperial, all units at once. In the browser.
Generate Apache .htaccess redirects – 301/302, force HTTPS, add/remove www. Runs entirely in the browser.
Generate a robots.txt for your website – allow/block crawlers, exclude paths, sitemap and crawl-delay. In the browser.
Calculate percentages and VAT – share, percentage value, increase/decrease and net/gross at 19% or 7%. In the browser.
Calculate days between two dates – total days, weeks, years/months/days, business days and hours. Live in the browser.
Create rounded corners with CSS – each corner individually, with live preview and ready border-radius code. In the browser.
Generate meta tags for SEO and social media – title, description, Open Graph and Twitter Cards. Runs entirely in the browser.
Generate time-sortable version 7 UUIDs – ideal as database keys. Cryptographically random portion, in the browser.