qtqc

Browser-based sequence QC — no data leaves your machine.

qtqc generates FastQC-style quality reports for FASTQ, FASTQ.GZ, and FASTA files entirely in your browser. Inspect per-base quality scores, sequence content, GC distribution, read lengths, adapter contamination, duplication levels, and more. Supports both short and long reads. Drop a file below to get started.

Drop FASTQ, FASTQ.GZ, FASTQ.ZIP, or FASTA files here

or click to browse

Enable Nextera adapter trimming & demultiplexing

Error rate Index mismatches Index sheet Read type

Barcode mode CDI / require i5+i7 UDI / allow single-index fallback

Map reads to reference genome (Hi-C / Dip-C contacts) Map reads to bait sequence with minimap2

All processing happens locally in your browser. No data is uploaded anywhere.

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