Kreisler wrote a number of pieces for the violin, including solos for encores, such as "Liebesleid" and "Liebesfreud". Some of Kreisler's compositions were pastiches ostensibly in the style of other composers. They were originally ascribed to earlier composers, such as Gaetano Pugnani, Giuseppe Tartini and Antonio Vivaldi, and then, in 1935, Kreisler revealed that it was he who wrote the pieces. When critics complained, Kreisler replied that they had already deemed the compositions worthy: "The name changes, the value remains", he said. He also wrote operettas, including Apple Blossoms in 1919[8] and Sissy [de] in 1932, a string quartet, and cadenzas, including ones for Brahms's Violin Concerto, Paganini's D major Violin Concerto, and Beethoven's Violin Concerto. His cadenzas for the Beethoven concerto are the ones most often played by violinists today.

He wrote the music for the 1936 movie The King Steps Out directed by Josef von Sternberg, based on the early years of Empress Elisabeth of Austria.

Kreisler performed and recorded his own version of the first movement of Paganini's D major Violin Concerto. The movement is rescored and in some places reharmonised, and the orchestral introduction is completely rewritten in some places. The overall effect is of a late-nineteenth-century work.

The mausoleum of Kreisler in Woodlawn Cemetery.

Kreisler owned several antique violins made by luthiers Antonio Stradivari, Pietro Guarneri, Giuseppe Guarneri, and Carlo Bergonzi, most of which eventually came to bear his name. He also owned a Jean-Baptiste Vuillaume violin of 1860, which he often used as his second violin, and which he often loaned to the young prodigy Josef Hassid. In 1952 he donated his Giuseppe Guarneri to the Library of Congress in Washington, D.C. where it remains in use for performances given in the library.

On recordings, Kreisler's style resembles that of his younger contemporary Mischa Elman, with a tendency toward expansive tempi, a continuous and varied vibrato, expressive phrasing, and a melodic approach to passage-work. Kreisler makes considerable use of portamento and rubato. The two violinists' approaches are less similar in big works of the standard repertoire, such as Felix Mendelssohn's Violin Concerto, than in smaller pieces.

A trip to a Kreisler concert is recounted in Siegfried Sassoon's 1928 autobiographical novel Memoirs of a Fox-Hunting Man.

The Australian manufacturer of electronics and consumer goods Kriesler (later a subsidiary of Philips) supposedly took its name after Fritz Kreisler but had intentionally misspelled the name as to avoid possible juristical actions from other parties.