India cricket icon Sachin Tendulkar, took to Twitter to hail Sindhu's historic triumph, saying her feat has made India proud.
"Amazing performance! Congratulations on becoming the 1st ever to win the BWF World Championships! You have made India proud, yet again," tweeted Tendulkar.
Other cricketing greats also congratulated Sindhu.
"Congrats@Pvsindhu1 on winning Gold medal at #BWFWorldChampionships2019 Great exhibition of skill, fitness and mental strength to defeat Japan's Okuhara in such an emphatic fashion. Proud of you," wrote former India batsman and fellow Hyderabadi VVS Laxman.
Former India spinner Harbhajan Singh wrote: "Congratulations PV Sindhu 1st indian to win Gold @Pvsindhu1 keep inspiring."
Sports Minister Kiren Rijiju said the country was proud of Sindhu for her unprecedented achievement.
"PV Sindhu creates history by becoming the first-ever Indian to claim gold in BWF World Badminton Championships! India is proud of @Pvsindhu1. My hearty congratulations! Govt will continue to provide best support & facilities to produce champions," Rijiju tweeted.
Sindhu's fellow competitor and Olympic medallist Saina Nehwal also tweeted: "Congratulations to @Pvsindhu1 for the first ever world championships gold medal from India."
It was Okuhara who had robbed off the gold from Sindhu, two years ago in an epic 110-minute final at Glasgow that went down as one of the greatest battles in badminton history, Sindhu finally exorcised the ghost of that heart-wrenching loss with a completely dominating win over the same opponent.
Sindhu has also won an Olympic silver in 2016 Rio Games, a silver at Gold Coast Commonwealth Games, an Asian Games silver at Jakarta and the BWF World Tour Finals last year.
For the third year in a row, India's ace shuttler P.V. Sindhu stormed into the finals of BWF World Championships after defeating China's Chen Yu Fei in straight games in the women's singles semifinals played out on Saturday.