WTXF-TV (channel 29) is a television station in Philadelphia, Pennsylvania, United States. Owned and operated by the Fox network through its Fox Television Stations division, the station maintains studios on Market Street in Center City and a primary transmitter on the tower farm in Roxborough, with a secondary transmitter on South Mountain in Allentown.

Channel 29 is the longest continuously operated UHF station in Philadelphia, since May 16, 1965, as WIBF-TV from studios in the suburb of Jenkintown. WIBF-TV was owned by the Fox family alongside WIBF-FM 103.9. It was the first of three new commercial UHF outlets that year, broadcasting as an independent station focusing on community and sports programming. Taft Broadcasting purchased channel 29 in 1969 and renamed it WTAF-TV. Under Taft, the station slowly emerged as the leading independent station in the Philadelphia market with popular sports coverage, movies, and syndicated programs. The station was the broadcast outlet for the Philadelphia Flyers hockey team between 1971 and 1985 and for the Philadelphia Phillies baseball team from 1983 to 1992. The latter deal came after Taft Broadcasting purchased 47 percent of the team. In early 1986, WTAF-TV began producing a 10 p.m. local newscast. Later that year, it became affiliated with the new Fox television network.

Ownership of channel 29 shifted to TVX Broadcast Group in 1987 as part of its purchase of Taft's five large-market independent stations; the call sign was changed to WTXF-TV the next year. The deal left TVX highly leveraged and ultimately led to the station's sale in two parts between 1989 and 1991 to Paramount Pictures. Paramount nearly lost the station's Fox affiliation when Fox tried to buy another Philadelphia station in 1993. That purchase fell through, and Fox ultimately purchased WTXF-TV itself in a deal approved in 1995. Fox expanded the news department, first with a morning show—Good Day Philadelphia—and later with additional early evening and other newscasts.

In November 1952, the first construction permit for channel 29 in Philadelphia was received by WIP radio, then owned by Gimbels department store, as part of a wave of ultra high frequency (UHF) station applications and assignments following a four-year-long freeze on permit awards. WIP returned the permit in May 1954, finding that building and operating the proposed station would be economically infeasible.

In August 1962, William Fox, whose family owned WIBF-FM (103.9) in Jenkintown as well as real estate interests there, received a construction permit from the Federal Communications Commission (FCC) to build a new television station on channel 29. The new station would focus on local and regional programming, including news, local sports, and educational shows; it was the second commercial UHF station approved for the Philadelphia area after channel 17 (originally WPCA-TV). The construction permit initially specified Jenkintown as the city of license, but this was changed to Philadelphia in 1963.

In 1965, plans for channel 29 became more definite as the station announced several launch dates: first April 15, then May 1, though the station did not start broadcasting until May 16. It had contracted to air feature films and several British children's shows. Local programs included the teen show Discotheque, as well as local talk and conversation with former WCAU host Taylor Grant on the station's late newscast. Channel 29 also broadcast network shows that the city's ABC affiliate, WFIL-TV, opted not to air. Its attempts to pick up a similarly unaired NBC show were rejected because the station could not broadcast it in color.

The number of operating commercial UHF stations in the Philadelphia area would go from zero to three in 1965. After WIBF-TV, Kaiser Broadcasting debuted WKBS-TV (channel 48) on September 1, and channel 17 returned to the air after three years as WPHL-TV on September 17. To increase its coverage area, in 1966, WIBF-TV built a new transmitting tower in the Roxborough area, its transmitter having previously been located at the Fox family's Benson East apartments along with the studio. In 1967, WIBF-TV debuted Market, a six-hour stock market review program.

By late 1968, the Foxes disclosed that their broadcasting operations were operating with a deficit of more than $2 million (equivalent to $13.7 million in 2024 dollars). This would prove to be a major factor in the decision to sell WIBF-TV to Cincinnati-based Taft Broadcasting, a transaction which closed in May 1969 for $4.5 million, including assumption of debt (equivalent to $30.9 million in 2024 dollars), at the time the most spent for a UHF facility; an article in Variety declared of the purchase price, "For many it symbolizes the 'arrival' of UHF in the television scheme of things." Taft had room for a second UHF station—in addition to WNEP-TV (channel 16) in Scranton—because it had sold WKYT-TV in Lexington, Kentucky, the year before. However, Taft needed FCC waivers because the company already owned five stations in top-50 markets and because the signals of the two Pennsylvania stations overlapped.