FASTQ to FASTA Converter
Strip per-base quality scores from sequencing reads and keep clean FASTA sequences for alignment, assembly or BLAST.
Why drop quality scores?
Quality strings often double the size of a sequencing file. Once you have trimmed and filtered your reads, most downstream tools — aligners, assemblers, BLAST, sequence databases — only need the sequence itself. Converting to FASTA makes files smaller and compatible with those tools.
What happens to the quality data?
It is discarded. If you still need the original reads, keep the FASTQ file — conversion is one-way and cannot be undone.
Frequently asked questions
Which FASTQ variants are supported?
Standard four-line FASTQ (Sanger, Illumina 1.8+) is supported. Multi-line sequence records, used by a few older tools, are not.
Are the identifiers preserved?
Yes. The @ header becomes a > header with the same content.