The 20-time grand slam champion triumphed after one hour and 10 minutes on court to become just the second man to a century of honours in the Open Era, Jimmy Connors having previously achieved the feat.
Connors ended his career with 109 titles.
The Swiss star beat Stefanos Tsitsipas - who knocked him out of January's Australian Open - 6-4 6-4 to reach the milestone.
Even if Roger has always stated that that record is not important for him, it's now clear that even if he will turn 38 at the this coming August, given his exceptional form and if the Swiss win some more titles this year he has a shot at catching the American. I don't know if Stefanos was born when I won my first title. Neither player faced a break point until the ninth game when Federer won four straight points on Tsitsipas' serve when he had led 30-0.
Roger Federer has replied to numerous instagram stories that have congratulated his achievement. "I had tough opponents all the way through - right up to Stefanos today".
"That's why I start missing those forehands that I never miss", he said. I cried my eyes out and he told me, "Don't worry about it, you will win some more" and I thought easy for you to say. It's been a long wonderful journey, it's been great and I wouldn't do it any differently.
"Tennis is in good hands regardless of if I'm there or not".
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5 - Federer has won both Wimbledon and the US Open on five consecutive occasions. But I'm not. I think this number proves that.
"I tried to be very aggressive myself and it worked out".
"I would like to personally congratulate him for the 100".
Federer reached the landmark with a ruthless 6-4, 6-4 dismantling of Greece's Stefanos Tsitsipas in the Dubai Championship final, his eighth trophy at the Gulf event.
"It felt like he was controlling everything on his own terms".
The unpredictable Australian, who seemed rattled at times by hostile fans in his victories over Nadal and Wawrinka, played happily to the crowd. "So many magical things going on", Federer said.
Federer broke serve in the first game and took the set on his fourth set point. I'd be happy with 100 (match) wins.