The J35 was the attempt by Sweden to create a domestic fighter that could replace both the J29 Tunnan and the J32B Lansen. Thus, the J35 has many records, including being the first fully supersonic aircraft deployed in Western Europe. The J35A was the first version of the J35, with a total of 90 units built between the two versions. The J35A1 (kort) had a short afterburner and a short tail. Meanwhile, the J35A2 (long) had a new afterburner with increased thrust, which meant that the tail section needed to be extended. While unexpectedly, this reduced drag, it forced the installation of a retractable tail wheel. The first batch produced in 1960 lacked gunsights and radar, which was a big mistake by the manufacturer, however, in 1961 the remaining units were delivered with the radar and gunsight installed.

Introduced in Update "Direct Hit", it was removed at the end of the 2023 May Sale and is briefly made available on some occasions. The J35A is a capable aircraft for its BR, but it has a few caveats that hamper its performance. For example, the J35A does not have access to any sort of countermeasures, playing safely and with good situational awareness is crucial, since many aircraft have access to excellent missiles that are very hard to dodge without flares. Thus, the J35A needs to remain fast, so it can outrun most missiles and force enemies to do bad launches. It has access to four RB24 (AIM-9B) missiles, which are rather rudimentary, but can be used from high altitudes to be dropped on unsuspected enemies.