SeqBench

Paste DNA or a FASTA record to get sequence stats, the reverse complement, six-frame translation, open reading frames, and motif search.

Your sequence

Summary

IUPAC codes work in motif search (N, R, Y, W, S, K, M, B, D, H, V). Matches on the reverse strand are counted too.

Standard genetic code. M marks methionine, * marks stop codons.

Minimum length (amino acids)

Strand	Frame	Start–end	Length	Protein

ORFs run from ATG to the first in-frame stop. Positions are on the forward strand, 1-based.

About SeqBench

SeqBench is a free online tool for DNA sequence analysis. Sequence stats, reverse complement, translation, ORFs, and motif search. It runs entirely in your browser, so there is nothing to install and your data stays on your device.

Features

GC content calculator
Reverse complement
Six-frame translation
ORF finder
IUPAC motif search
Save results as text, spreadsheet, or sequence files
Installs on your phone and works offline

Common questions

What does SeqBench calculate?

Length, GC and AT content, base composition, an estimated melting temperature, and single-strand molecular weight, plus the reverse complement, RNA transcript, translation in all six reading frames, and open reading frames.

Can I paste FASTA?

Yes. Header lines starting with > are ignored, and spaces, numbers, and line breaks are removed automatically. RNA (U) is converted to DNA (T).

Is my sequence uploaded anywhere?

No. All analysis happens in your browser, so your sequence never leaves your device.