What is django-render-fragment?

django-render-fragment is a small Python package that adds a single template tag to Django, the popular web framework. It solves a specific pain point: Django's built-in include tag, used for pulling in template snippets, does not support template inheritance through the extends tag inside those snippets. This makes it awkward to build a library of reusable interface components, things like cards, buttons, badges, and form fields, that all share a common base layout. The render_fragment tag fixes this by running the target template through Django's full rendering engine instead of the simpler include path. Any template fragment can then use extends to inherit from a shared base template, defining blocks for titles, bodies, or other sections, exactly the way full-page templates already do. You use it by loading the tag library and calling render_fragment with the template name and any variables it needs. An optional only modifier isolates the fragment so it sees only the variables you explicitly pass in, rather than inheriting everything from the surrounding page. An as option captures the rendered output into a variable so it can be reused elsewhere in the same template. Because the only modifier makes a fragment's output depend solely on its declared inputs, it pairs well with Django's built-in cache tag. You can cache something like a product card or a save button using a precise cache key, confident that nothing from the surrounding page context can leak in unexpectedly. The package has no external dependencies and requires no configuration beyond adding it to INSTALLED_APPS. render_fragment runs somewhat slower than include because it invokes the full template machinery on every call, a deliberate trade-off made in exchange for the inheritance support it enables. The full README is longer than what was shown.