For teachers

Colouring worksheets from your own images

Turn a diagram, a specimen photograph, or a picture from yesterday's field trip into a printable worksheet — without sending classroom images to a third-party service.

Why make your own instead of downloading one

Generic printables are abundant and rarely match what you are actually teaching. A worksheet built from the diagram in your own slides, the plant the class looked at on Tuesday, or a photograph of the model they built connects to the lesson in a way a stock illustration cannot.

The practical obstacle has usually been time, and secondarily privacy: uploading photographs that may include students to an unknown service is a conversation most schools would rather not have. This tool removes both objections. Conversion takes seconds, and nothing is uploaded, because the site has no upload capability at all.

Classroom uses

  • Label-and-colour diagrams

    Convert a cross-section or a life-cycle diagram at High detail with Thin lines, then add blank label lines in your word processor. Students colour the regions and name them.

  • Field-trip follow-up

    Photograph what the class saw, convert it that evening, and hand it out the next morning. The recall value of a picture they were standing in front of is substantial.

  • Art and observation

    Give the class the outline of a still life and the original photograph side by side. Colour matching from a reference is a genuine observational exercise.

  • Early-finisher tasks

    Keep a folder of pages made from topic images. Low detail and Thick lines make them quick to complete and quick to print in bulk.

Practical notes for classroom printing

  • Use PDF for handouts, PNG for building your own. The PDF carries the paper size, so A4 will not be silently rescaled to Letter by a shared printer. The PNG drops into a document template.
  • Thicker lines survive a photocopier. If a set is going to be copied rather than printed, choose Thick. Thin lines and a worn copier drum are a poor combination.
  • Watch the ink percentage. The preview reports how much of the page is black. Above roughly a third, a class set becomes noticeably expensive; lowering Detail usually fixes it.
  • Crop before converting. Removing the parts of a photograph that are not the subject is the single most effective step, and takes a few seconds in any photo viewer.

Copyright in a school context

Educational use is not a blanket exemption. Photographs you or your school took are straightforward. Images from a textbook, a stock library, or a search results page belong to someone else, and converting one into a coloring page produces a derivative work rather than a new one — a distinction that matters as soon as the sheet is distributed to a class or shared with other schools. Where the licensing is unclear, your own photograph of the same subject is both safer and usually more relevant.

Frequently asked questions

Does this satisfy our safeguarding rules on student images?

Check with your data protection lead, but the relevant fact is that no image is transmitted. The conversion runs in the browser on the device in front of you, the site has no upload endpoint or storage, and nothing is written to disk except the file you choose to download. In data-protection terms there is no processor other than you.

Can I use it on a locked-down school device?

In most cases yes. It is an ordinary website with no plugin, no install, and no account. It needs JavaScript enabled and a browser from roughly the last three years. There is no extension requirement — that is optional and separate.

Can I put the output in my own worksheet?

Yes. Download as PNG instead of PDF and you get line art on a white background, ready to place into a document, a slide, or a worksheet template alongside your own instructions and questions.

How long does a page take to make?

Under a minute once you have the picture. Most of that is deciding on the detail level; the conversion itself is close to instant, and adjusting a setting redraws the preview immediately.