FASTQ Quality Viewer
Open FASTQ files directly in the browser to visualize per-base Phred quality scores, GC distribution, and sequence length distribution.
Drop a .fastq file or click to browse
All processing happens in your browser — no data is uploaded
QUALITY SCORE REFERENCE
- • Q30: 1 in 1,000 error rate (99.9% accuracy)
- • Q20: 1 in 100 error rate (99% accuracy)
- • Q10: 1 in 10 error rate (90% accuracy)
- • Illumina typically produces >80% bases ≥ Q30