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About PrinterTools

PrinterTools is built and maintained by Dan Dadovic — a developer, researcher, and digital publishing professional based in the UK. The site exists because Dan got tired of the same problem everyone faces: trying to figure out whether a printer is broken, low on ink, or just needs a cleaning cycle, and having no quick, reliable way to test it.

Dan holds a PhD in Information Sciences and two Master's degrees (Economics and Informatics) from the University of Zagreb. His doctoral research focused on identifying critical success factors in technological ecosystems — work that directly informs how he designs tools that solve real problems for real people.

Professional Background

By day, Dan serves as Commercial Director at Ezoic, where he leads new revenue strategy across the digital publishing industry. That role means he works constantly at the intersection of web technology, content quality, and user experience — the same principles that drive PrinterTools.

He also builds and runs other software projects, including BinBosh, a community-powered UK bin collection reminder app, and CalculatorCorp, a suite of free online calculators. Across all of his projects, the approach is the same: identify a genuine everyday problem, build a tool that solves it in the browser, and make it free to use.

Why PrinterTools Exists

Printers are one of those things that should just work — but often don't. When ink runs low, nozzles clog, or colors shift, most people have no quick way to diagnose the problem. The manufacturer test pages are buried deep in printer menus, and the web is littered with ad-heavy sites offering PDFs that barely load.

PrinterTools started as a side project to fix that. Every test page prints directly from the browser with accurate colours thanks to the print-color-adjust: exact CSS property, which forces browsers to render colors faithfully rather than adjusting them for screen viewing. Dan spent months testing print output across HP, Canon, Epson, and Brother printers to ensure the patterns reliably reveal real issues — from clogged nozzles to misaligned print heads.

The colour converter tools grew out of a need Dan kept hitting in his own design work: converting between RGB, CMYK, HEX, Pantone, RAL, and NCS without hopping between three different websites. The color conversion library uses standard mathematical formulas for lossless conversions (like RGB to HEX) and nearest-match algorithms for approximate conversions (like CMYK to Pantone), always with transparent distance scores so you know how close the match is.

Why Trust PrinterTools

  • Independent and unbiased — we are not affiliated with any printer manufacturer. Our guides and recommendations are based on hands-on testing, not sponsorship deals.
  • Privacy-first — all tools run in your browser. Images you upload to the color picker never leave your device. We don't track your color data or print activity.
  • Technically rigorous — our color conversions use published mathematical formulas, not guesswork. The site is built with modern web standards (Next.js, TypeScript) and statically generated for sub-second page loads.
  • Free with no catches — no account required, no downloads, no paywalls. We believe basic printer diagnostics and color tools should be accessible to everyone.

What We Offer

  • 13 printable test pages — B&W, Colour, CMYK, alignment, nozzle check, RGB, photo quality, grayscale, solid black, individual colours, bleed, ruler, and text clarity
  • 17 colour converter tools — browser-based converters for CMYK, RGB, HEX, Pantone, RAL, NCS, HSL, and HSV with real-time previews and one-click copy
  • Colour picker from image — upload any photo, click to sample, and get HEX, RGB, and HSL values
  • Printer guides — step-by-step instructions for HP, Canon, Brother, Epson, Dell, Lexmark, Samsung, Xerox, and DTF printers
  • Downloadable PDFs — B&W, Colour, and CMYK test pages available as offline-ready PDFs

Everything runs directly in your browser. No accounts, no downloads, no tracking of your images or colour data.

Get in Touch

Have a suggestion, found a bug, or want to see a new tool? Dan reads every message — get in touch.