.CRT file extension

This is the basic program to work with .CRT extension

Yahoo! Internet Mail

Yahoo! Internet MailSecurity Certificate

The program works with the following extensions: gif, zip, jpg, wmf, bmp, png, jpeg, tif, jpe, udl, url, ivf, p7r, crd, cat, p7s, cer, tvp, cnf, prf, crl, qds, cdf, crt, rat, uea, der, shb, dib, shs, dun, sst, emf, stl, jfif, tiff, crds, ueaf, theme, msstyles, appref-ms and slupkg-ms

.CRT extension is also supported by the following programs:

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Professional Notepad

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KUSBDTII & II+Security Certificate