Utilities
Password generators, HMAC, regex, cron and format converters.
Secure Password Generator
Generate random, secure passwords with the length and character types you choose.
HMAC Generator
Compute the HMAC of a message with a secret key using SHA-256, SHA-1 and more.
Regular Expression Tester
Test your regular expressions live with match and group highlighting.
Cron Expression Parser
Parse cron expressions and get the next 10 execution times, with a plain-language explanation.
HTML to Markdown Converter
Convert HTML to Markdown and back instantly, with a live preview.
Placeholder Image Generator
Generate SVG placeholder images with custom size, colors and text, ready to download.
VAT Calculator
Calculate Spanish VAT instantly: add, remove or compute 21%, 10% and 4%.
IBAN Validator
Check whether an IBAN account number is valid using the modulo-97 algorithm and each country's length.
Spanish DNI/NIE Check Letter
Compute the check letter for a Spanish DNI or verify whether a NIE's letter is correct.
Mean & Statistics Calculator
Calculate mean, median, mode, variance, standard deviation and more statistics for a list of numbers.
URL Encoder / Decoder
Encode and decode URLs, URL components and HTML entities instantly.
Random Number Generator
Generate random numbers, decimals or hexadecimal colors with options to sort or allow repeats.
Cron Builder & Analyzer
Build cron expressions from visual selectors, analyze existing expressions and show upcoming runs.
Image Resizer
Resize an image and download it as PNG, JPEG or WebP with quality control.
Percentage Calculator
Calculate percentages instantly: what X% of a number is, what percentage a value is of another, and the percentage change between two figures.
CSS and JavaScript Minifier
Minify CSS and JavaScript in your browser: strip comments and unnecessary whitespace to reduce file size.