fg-sra is a high-performance toolkit for converting NCBI SRA archives. fg-sra tosam replaces sam-dump, writing SAM, BAM, FASTA, or FASTQ with multi-threaded processing, genomic region filtering, quality score quantization, and reference caching. fg-sra fastq writes FASTQ in spot order with mates paired, and fg-sra info describes an archive's kind, totals, qualities, read names, and read layout.