Drop a FASTA or FASTQ file here, or browse
Plain text or gzip-compressed. Big files are fine: the first and last part are kept in memory, the middle is counted.
No file loaded
Click a record above to inspect it here. Shift + ↓/↑ moves between records.
Keyboard shortcuts
| ↓ ↑ j k | Scroll one line |
| PgDn Space / PgUp | Scroll one page |
| Home g / End G | Start / end of the loaded records |
| ← → | Scroll sideways when Wrap is off (Shift: 25 bp) |
| Shift ↓ ↑ or ] [ | Select next / previous record |
| Enter | Select the first record on screen |
| c | Copy the selected record |
| / | Search: an oligo (ACGTN) searches sequences, anything else searches names and comments |
| n / N | Next / previous match |
| : | Jump to a record number |
| S R 0 U | Toggle wrap, numbers, colours, quality characters |
| ? Esc | Show / hide this help |
Quality bars follow seqfu less: bar height steps at Q3, 15, 25, 28, 30, 35, 40; colour marks Q30+, Q20–29, below Q20 and Q3 or less.