Committee officials who give out the prestigious prize in journalism and the arts said Frazier's recording highlighted "the crucial role of citizens in journalists' quests for truth and justice".
The Pulitzer Prize board announced it was awarding Frazier a special citation for the video she shot on May 25, 2020, which showed four now-former Minneapolis police officers restrain Floyd outside the Cup Foods convenience store. "He was suffering. He was in pain".
Frazier's video was "globe shaking", spoke truth to power and gave a voice to the voiceless, Clark said.
"My video didn't save George Floyd", she added, "but it put his murderer away and off the streets".
She later testified at Chauvin's trial, with her video proving instrumental in his conviction.
Melvin Carter, the mayor of St. Paul, Minn., had even previously suggested Frazier should win the Pulitzer Prize for taping the arrest that would later go viral.
In advance of Friday's announcement, some media observers had been calling for the Pulitzer board to give Frazier an award, including four-time former Pulitzer juror Roy Peter Clark, who acknowledged "the material and the creator fall outside the traditional boundaries" of the prizes but that her video has a "social and ethical objective, one that aligns with journalistic values". Last year, she earned recognition from PEN America.
Floyd's murder took a personal toll on Frazier, who described her ongoing trauma around witnessing his killing on Instagram. "A lot of people call me a hero even though I don't see myself as one".
The three other officers involved in Floyd's arrest are scheduled to face trial next year on aiding and abetting counts.
"When I look at George Floyd I look at my dad, I look at my brother, my cousins, my uncles - because they are all black", she said, audibly crying.