This hub only lists utilities. Open a ZIP tool or a color converter — each page does one job.
Approximate CMYK colors as RGB for the web.
Approximate RGB colors as CMYK percentages.
Convert HSL colors to HEX codes.
Convert HEX colors to HSL values.
Approximate CMYK print colors as a HEX code.
Approximate a HEX color as CMYK percentages.
Convert HSL colors to RGB channel values.
Convert RGB colors to HSL values.
Approximate HSL colors as CMYK percentages.
Approximate CMYK colors as HSL values.
ZIP create and extract pack and unpack files in the browser. A ZIP is a wrapper, not encryption — it does not anonymize PDFs or photos inside. Color converters (RGB, HEX, HSL, CMYK) are approximations for the web; they are not a calibrated print proof.
Base64 tools encode an image as text for CSS or HTML embeds. The string is large; do not use it as a substitute for compressing a photo. Contrast checker is for WCAG-style text/background pairs.