Tabix

Tabix is a free software utility for indexing TAB-delimited genome position files.^[1] It is commonly used in bioinformatics analysis to index large genomic data files such as GFF, VCF,^[2] or BED files for efficient data retrieval.^[3] Tabix was developed by Heng Li and is distributed under the MIT license.^[4][5]

Use

Tabix requires the input file to be position-sorted and compressed using BGZF. After indexing, Tabix is able to retrieve data lines overlapping query intervals regions specified in the format "chr:start-end." The index files have a .tbi or .csi extension.^[5]

It also supports data retrieval over network using direct URL if the index is present in the same location or locally. It also supports multithreading for operations except listing of sequence names.^[5]

See also

• SAMtools