The Edge Festival was an annual music festival held in Edinburgh, Scotland, during August of each year. Formerly known as T on the Fringe, The Edge was part of the Edinburgh Festival Fringe, the world's largest artsfringe festival (to the larger Edinburgh Festival). Unlike other music festivals, The Edge did not take place at one location, with performers instead playing numerous venues across the city during the month. The festival was founded under the T on the Fringe name by DF Concerts and Tennent's Lager, with DF continuing to promote the festival after the departure of Tennent's from 2008 until 2012.
The festival began in 2000, with fifteen concerts in its first year. It was founded by Dave Corbett, after realising the lack of contemporary music taking place at the Edinburgh Festival. Since 2000, T on the Fringe has played host to some of the most commercially successful artists as well as the best in alternative and emerging talent. Over the years the event has seen performances by the likes of Pixies, Muse, Morrissey, Nancy Sinatra, Franz Ferdinand and Arcade Fire. The 2007 festival featured three concerts taking place at the 25,000 capacity Meadowbank Stadium, a record for the festival at the time.
The 2005 festival took place between 5–31 August, with more than forty acts performing across five venues. The festival's main highlight was a performance by Pixies on 28 August 2005, playing as part of their reunion tour following a 12 year hiatus. The band performed at the city's Meadowbank Stadium, the first outdoor performance for the T on the Fringe festival, with support from Idlewild and Teenage Fanclub. The festival's other main draw was two homecoming performances by Franz Ferdinand in Princes Street Gardens on 30–31 August 2005, supported by Arcade Fire. The dates were the band's first performances in the country since December the previous year. Other headline T on the Fringe shows included The Prodigy, Alabama 3, The Zutons, Weezer, Basement Jaxx and Razorlight. During August, Edinburgh's Cabaret Voltaire venue hosted a number of free concerts, featuring former Squeeze lead vocalist Glenn Tilbrook, Michael Franti, Saul Williams, Trashcan Sinatras and Rachel Fuller performing acoustic sets between the 15—26 August. Idlewild would also play acoustically at the venue, appearing on 27 August prior to supporting Pixies. Idlewild's concert was later steamed online for three months following the festival, under the moniker of "T on the Fringe Radio". The broadcast also included a feature on the Best of T Break.
The festival was deemed a success by critics, with Lynsey Hanley of The Observer stating that "..[the festival's line-up] encompassed the past, present and future of alternative rock".
2006 saw 100,000 tickets sold for almost 60 gigs featuring 134 artists. Snow Patrol rocked the 22,000 Meadowbank Stadium crowd in what was their biggest headline gig yet, while at the same time breaking a record already held by T on the Fringe for the biggest show at the Edinburgh Fringe. Radiohead performed at the same venue supported by Beck and Muse played the following night supported by My Chemical Romance.
The 2007 festival took place on 4—28 August across four venues, with more than 60 events taking place. The festival was marked by the announcement of three large outdoor concerts taking place at Meadowbank Stadium, which had increased in capacity to 25,000 for the event. Two of the headlining acts were announced as Foo Fighters and Kaiser Chiefs, with Razorlight later confirmed to play the stadium. The three concerts marked the biggest performances in the festival's history. Support acts for Foo Fighters and Razorlight were later confirmed as Nine Inch Nails and Silversun Pickups, and Editors, respectively. As well as this, independent record labelChemikal Underground announced a showcase at the Liquid Room featuring Mother and the Addicts, Aidan Moffat and De Rosa, in honor of the record label's 100th release. The festival's full line-up, announced on 7 June 2007, was as follows:
 Guillemots were originally scheduled to perform at the Corn Exchange, but chose instead to play two separate smaller performances, at the City Cafe and later in the Liquid Rooms. Greg Forbes of festival website eFestivals said that Editors' supporting concert at Meadowbank Stadium "blew them away", outperforming headliners Razorlight. In 2008, The Independent reported the 2007 event had sold 130,000 tickets, highlighting that the total number of events taking place had now quadrupled from the festival's inaugural year.
^ ab"T on the Fringe '05". eFestivals. Retrieved 2010-06-22. The festival featured performances at Edinburgh's Meadowbank Stadium, Princes Street Gardens, Corn Exchange, Liquid Room, and Cabaret Voltaire.
^"Edge Festival 2009". eFestivals. 2009-08-18. Retrieved 2010-06-22. ..venues [..] including the Edinburgh Playhouse, HMV Picture House, Sneaky Pete's and Studio 24, as well as .. Cabaret Voltaire, Queen's Hall and the Corn Exchange.