ORF Finder searches for open reading frames (ORFs) in the DNA sequence you enter. The program returns the range of each ORF, along with its protein translation. Use ORF Finder to search newly sequenced DNA for potential protein encoding segments. ORF Finder supports the entire IUPAC alphabet and several genetic codes.

Paste the text into the text area below. Input limit is 100000 characters.

  • ORFs can begin with: .
  • Search for ORFs in reading frame on the strand.
  • Only return ORFs that are at least codons long.
  • Use the genetic code.


P. Stothard. The sequence manipulation suite: JavaScript programs for analyzing and formatting protein and DNA sequences. Biotechniques 2000; 28: 1102, 1104.