Sequence Alignment
Pairwise alignment (Needleman–Wunsch / Smith–Waterman with BLOSUM62 and affine gaps) and multiple alignment (Kalign 3 compiled to WebAssembly) run entirely in your browser. Protein or DNA is detected automatically.
Sequences
Examples:
Pairwise alignment uses the first two sequences (up to ~4000 residues each). Kalign handles many sequences and long proteins; the first run downloads about 1 MB.
Alignment
Paste or fetch sequences and press Align. The viewer colours residues by physicochemical class (Clustal-style) and shows per-column conservation; click any cell for its position.