Phastats

Advanced FASTQ Quality Control & Analysis

Professional FASTQ Quality Analysis

Phastats provides comprehensive quality control analysis for FASTQ sequencing data. Upload your files to get detailed insights into sequence quality, GC content distribution, per-base content analysis, and length statistics with interactive visualizations and reports.

Drag and drop your FASTQ file here, or

Size: MB

Supported formats: .fastq, .fq, .fastq.gz, .fq.gz (max 100MB)

Minimum quality score for analysis
Threshold for high-quality bases
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What we analyze:
  • Sequence length distribution
  • Quality score distribution
  • GC content analysis
  • Per-base sequence content
Output formats:
  • Interactive HTML report
  • JSON statistics file
  • High-quality plot images
  • Complete results package