Yes, an urban planter box can be used indoors near a window with low light, but it should be treated as an adapted indoor setup rather than a direct outdoor transplant. The planter itself needs to suit indoor conditions: stable, not too heavy for the floor or sill, lined or sealed if it is not waterproof, and fitted with a saucer or internal drainage tray so water does not damage floors. Good airflow and a position away from radiators, drafts, and constant air-conditioning are also important.
The bigger limitation is light. A low-light window may be enough for shade-tolerant foliage plants such as pothos, snake plant, ZZ plant, philodendron, peace lily, or cast iron plant, but it is usually not enough for sun-loving vegetables, fruiting plants, or most flowering herbs. If you want to grow herbs or edibles, choose lettuce, mint, parsley, or chives and expect slower growth; a small full-spectrum grow light will make results much more reliable. Rotate the planter regularly so plants do not lean toward the glass, and water less often than you would outdoors because indoor soil dries more slowly.
Also check weight, drainage, and pest risk. Use a lightweight potting mix, empty saucers promptly, and keep leaves from touching cold windowpanes. With the right planter and low-light plant choices, an urban planter box can be a practical indoor feature near a low-light window—but it is not a good fit for high-light crops without supplemental lighting.