Click the "Select File" button above, and choose your FASTQ file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert FASTQ to another file type
To convert FASTQ sequence files to another format, you need FastQC or other Data software.
Convert a file to FASTQ
To convert other file formats to the "Bioinformatics Sequence File" file type, you need software like FastQC or a similar tool.
About FASTQ files
The .FASTQ file format is a text-based standard for storing biological sequences (such as DNA or RNA) along with their corresponding quality scores. Developed at the Wellcome Sanger Institute, it is the default output format for high-throughput, next-generation sequencing platforms like Illumina MiSeq and Oxford Nanopore. Bioinformaticians rely on specialized tools like FastQC to parse and analyze the integrity of these sequence reads before downstream processing.
However, working directly with .FASTQ files poses severe logistical challenges for standard users. These files are notoriously gigantic - often ranging from tens of gigabytes to terabytes per sequencing run. This sheer volume makes them impossible to open in standard text editors or transfer over standard networks without crashing your system. Furthermore, the format is highly specialized; researchers who only need the raw sequence data find the integrated ASCII quality characters unreadable, useless, and space-consuming.
To bypass these limitations, you need to convert or compress your .FASTQ files. If you only require the sequence strings without the heavy quality scores, convert the file to FASTA. For easier parsing in databases or spreadsheets (after downsampling the data), convert to CSV or TXT. For mandatory long-term archiving and storage, compression into GZ (creating a .FASTQ.GZ file) is universally recommended.
Convert.Guru analyzes your FASTQ file, detects the exact format, and lets you read the text inside.
If you want to convert FASTQ file to , you can use FastQC or similar software from the "Biological Sequence Quality Data" category. In the File menu, look for Save As… or Export….
To convert files to FASTQ, try FastQC or another comparable tool in the "Biological Sequence Quality Data" category.
The FASTQ Converter Story
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our FASTQ converter.