With this primer design tool, provided by Integrated DNA Technologies, the user can analyze the input sequence (up to 255 bases) obtaining helpful data: GC content, molecular weight, complementary sequence, a representative image of the hairpin, self-dimer and heterodimer structures formation of the primer sequences…
Moreover, Oligo Analyzer 3.1, allows you to Blast your primer with NCBI.
Enjoy this free online tool!