Linea

Step one is to choose your input. Upload a photo you are allowed to use, such as a pet, a family picture or a place, or write an original theme like "a cozy mountain campsite at sunset, with a small tent, a crackling campfire and tall pine trees".

Step two is to preview the coloring page. Linea creates the AI line art and shows it to you. A credit is used only once a completed page is saved, and if a generation fails, the credit goes back to your balance.

Step three is to download and print. Pages come as a PNG or as a PDF sized for A4 or US Letter paper, ready to print at home or use for general classroom activities. The photo and text tools draw on the same credit balance, and one successfully saved page uses one credit.

• •Photo to coloring page - Upload a permitted photo and get clean, well-balanced outlines, with several line-art styles to choose from.
• •Text to coloring page - Describe any theme in your own words and get a one-of-a-kind printable page at the same quality as the photo tool.
• •Detail levels - Choose simple outlines for young children and family time, or detailed, layered illustrations for adults who want a longer creative break.
• •Print-ready downloads - Every page downloads as a PNG and as an A4 or US Letter PDF.
• •Free coloring library - Ready-made pages for cats, dogs, dinosaurs, unicorns, flowers, fall, Thanksgiving and Christmas that download with no sign-in.
• •Fair credit handling - Credits are only spent on pages you save, failed generations are refunded, and plans renew monthly with fresh credits each cycle.

Linea is aimed at parents making activities for their children, teachers and homeschoolers preparing classroom sheets, and adults who color to relax. The pricing tiers are labelled for exactly these groups: Starter for occasional family or teacher use, Standard for frequent household or homeschool use, and Premium for high-frequency adult organizers.

It is especially useful for turning a personal photo, like a family pet or a holiday scene, into a page a child will actually want to color. People who only need standard themes can use the free library without spending any credits.