Developer & Programmer

Calculate how long a data transfer takes at a given link speed, or the bandwidth needed to move a dataset…

Free unix timestamp converter. Calculate Unix epoch seconds and milliseconds to UTC ISO time with…

Free json formatter & validator. Calculate JSON validation, pretty formatting, minification and developer…

Free base64 encoder / decoder. Calculate UTF-8 text to Base64 and Base64 back to UTF-8 text with step-by-step…

Free uuid generator. Calculate random UUID v4 identifiers for applications, databases, APIs and testing with…

Free hash generator. Calculate deterministic FNV-1a 64-bit text hashes for identifiers, debugging and test…

Free regex tester. Calculate JavaScript regular-expression matching, flags and match inspection with…

Free color converter. Calculate HEX and RGB conversion for CSS and frontend development with step-by-step…

Free px ↔ rem calculator. Calculate CSS pixel and rem conversion using a configurable root font size with…

Free css unit converter. Calculate px, rem, em, pt and percentage reference conversions for CSS with…

Free epoch time calculator. Calculate epoch seconds and milliseconds with UTC date conversion with…

Free cron expression generator. Calculate common five-field cron schedules and plain-language meanings with…

Free http status code lookup. Calculate 2xx, 3xx, 4xx and 5xx HTTP response-code meanings with step-by-step…