Do you know Photopea.com. Coded over the course of five years by ONE developer, runs in your browser, and it is basically a full-fledged Photoshop (at least for casual users, anyway). Plus it's free (ad-supported) and requires no registration.
Thank you for the bug report. Just fixed it. A version of a picture was missing, and the script interrupted because of the error. And thank you also for your kind feedback.
After reading the BMJ study (https://www.bmj.com/content/370/bmj.m3223), I realized a lot of people could benefit from a more nuanced understanding of the various factors and how they contribute to the overall risk of COVID-19 transmission. But the table in the study was somewhat hard to read, since it was basically a five-dimensional chart. I am a science journalist who started learning how to code this March. This is only my second public tool, so please be gentle. Comments and suggestions are appreciated.