Hopi

hopi.co.uk

Free online calculators, converters, generators and tools. Percentages, VAT, take-home pay, unit conversions, dates, colours, passwords and more. No sign-up.

Status: Live
Tools: 8
Last checked: 7h ago
Listed since: Sep 21, 2026

8 tools

Changes

Addedhopi_aes_text_encrypterSep 21, 2026
Addedhopi_angle_converterSep 21, 2026
Addedhopi_aspect_ratio_calculatorSep 21, 2026
Addedhopi_base32_encoderSep 21, 2026
Addedhopi_css_minifierSep 21, 2026

3 earlier changes

Addedhopi_directorySep 21, 2026
Addedhopi_download_time_calculatorSep 21, 2026
Addedhopi_searchSep 21, 2026

8 tools

hopi_angle_converterread-onlyConvert an angle from one unit to another. Units: deg (degrees), rad (radians), grad (gradians), turn (full turns).

hopi_aspect_ratio_calculatorread-onlyAspect ratio helper. In 'simplify' mode, give width and height to get the simplified W:H ratio, decimal ratio and nearest common ratio. In 'solve' mode, give a ratio (ratioW:ratioH) plus one of width or height to get the missing side.

hopi_css_minifierread-onlyMinify CSS by removing comments and needless whitespace, while preserving quoted strings and the spaces inside calc() expressions. Returns the minified CSS with before and after byte sizes.

hopi_directoryread-onlyList all of Hopi's agent-callable tools (name, page URL, category, description). Call this first to discover the catalogue, then open a tool's url and invoke the tool named there.

hopi_download_time_calculatorread-onlyEstimate how long a download takes. Give a file size with its unit (MB, GB, TB) and a connection speed with its unit (Mbps or Gbps in bits per second, or MBps in bytes per second). Returns a human-readable duration and the time in seconds.

hopi_searchread-onlySearch Hopi's tools by keyword and get the best matches (title, page URL, category, description). Use this when you know the task but not the exact tool, e.g. 'kg to stone', 'take home pay', 'convert hex to rgb'. Open a result's url to use it.

Changes