Probably the easiest solution is to buy some deer fabric, which is light weight black plastic netting. It can easily be draped across the tomatoes. Another strategy is to camouflage the tomatoes with distractors. Hang red Christmas ball or other red balls among the fruit. The birds will peck the fake tomatoes, will find them less than tasty, and will likely leave the true red tomatoes alone.
Birds or squirrels almost never bother my tomatoes unless we are having a pretty severe string of hot dry days. I think that the tomatoes are a source of water/fluid. If that is the case, then a bird bath or sprinkler on a timer, could draw the birds away from the ripe fruit.
Eclectic gardening style, drawing from 45 years of interest and experience. Mostly plant in raised beds and containers primarily using intensive gardening techniques.