Complementary Sequence Conversion Tool

Directions: Input a DNA or RNA sequence* and click the Convert button to get the complementary DNA or RNA sequence in either the forward or reverse direction.

*NOTE: This current script version only allows for bases only; any letters other than (upper or lower case) A, T, U, C, G, N or X will cause an error.

Input Sequence:

Indicate desired output direction:
Indicate desired output nucleotide type:

Converted Sequence:

Sequence Length (base pairs):

Number of Bases Original Complement
Ts or Us