One of the best apps to convert your photo into a cartoon for free is AI Cartoonizer. This turning photos into a cartoon online tool is easy to use and provides quick, high-quality results. You simply upload your photo, and the AI applies a cartoon filter, turning your image into a fun, artistic cartoon-style version. It offers customization options, allowing you to tweak the final image to suit your preferences.

Other notable free apps include ToonMe and Cartoonify, which also offer great cartoon effects. However, if you're looking for a fast, straightforward solution, AI Cartoonizer is a reliable choice with a user-friendly interface and excellent results without the need for complex software or skills.