Aim: Formalin fixing and paraffin embedding of tissue samples is one of the techniques for preserving the structural integrity of cells for a very long time. However, extraction and analysis of genomic material from formalin fixed tissue (FFT) remains a challenge despite numerous attempts to develop a more effective method. The success of polymerase chain reaction (PCR) depends on the quality of DNA extract. Materials and Methods: Here we assessed the conventional method of DNA extraction from FFT for African swine fever virus (ASFV) detection. The modified conventional method gave a higher quality DNA when compared with commercially available DNA extraction kits (QIAamp® DNA Mini Kit, DNeasy® Blood and Tissue Kit, and ZR Genomic DNA? Tissue MiniPrep). Results: An average A260/A280 DNA purity of 0.86-1.68 and 3.22-5.32 ?g DNA/mg for formalin fixed and non-fixed tissues, respectively using a conventional method. 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