On Android I see the Manage Filters functionality and it works very well. How do I see these filters on the web, or create new ones?
Unfortunately, filters are currently not available on the web-version, but we're working on this right now and such feature will be implemented into the web-app soon.
There is a work-around. Create the filter and just bookmark the page. This works because the search criteria are embedded into the URL to work.
Thank you for your feedback. This will indeed work, but it will include the version number within the URL and therefore we can't guarantee stability of our app as once a new version comes out, your browser will read the old one which may contain or lead to bugs or unexpected behavior so we strongly recommend to never bookmark any other URL that https://todoist.com which will always check for the last version and forward you to it.
We're already working on saved filters so it will be easy to use them on the web, just as on mobile :)
One temporary workaround would be do use some text expander or automator tool like textexpander, Keyboard Maestro etc. You could save keyboard shortcut or some short keyword that will execute the search/filter function.