lav2svg is part of the Fasta3 package of software.

lav2svg takes lav format output from lalign and generates a graphical rendition of the results in svg (scalable vector graphics).

To do this, use the -m 11 flag with lalign. This generates lav format output. Pipe the lalign results directly to lav2svg:

See also lav2ps, which generates the graphical output from lalign in postscript format.