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Random DNA Sequence Generator

Specify Size of DNA, Base frequencies and click generate to get a random DNA sequence in FASTA format

Length of DNA sequence (in base pairs) :

Specify composition:
A: %

C: %

G: %

T: %


  • Generates random DNA sequence up to a length of 9999 nucleotide bases
  • Generates output in FASTA format

Please send feature request/bug report at my email address specified in the sidebar. if you find this tool useful please share or Like it on Facebook.