I need to use @font-face feature and my fonts are in OTF/TTF format and Microsoft browsers support only EOT format. I tried to use Microsoft tool WEFT, but it didn't work or I didn't understand how it works. Is there any other way to convert my fonts to EOT format?
Try Googling TTF to EOT. There is a number of on-line converters that might work for you.
Be aware though that most licenses forbid electronic re-distribution of their fonts.
Use the Font Squirrel Generator - this will produce not just EOT, but also SVG and WOFF formats, and converting multiple font files at once, and providing everything in a single archive along with the relevant CSS.
Here's a quick way to build ttf and eot versions from otf in one step. Of course you can pull out the relevant parts if you don't need all of it. Note that you to get eot from otf you have to go otf->ttf->eot.
Install both fontforge and ttf2eot. They are available in MacPorts, not sure about other platforms.
Save this as a script file named otf2ttf2eot.sh:
#!/bin/sh
# Convert an OTF font int TTF an EOT formats.
otfFont="$1.otf"
ttfFont="$1.ttf"
eotFont="$1.eot"
fontforge -c '
Open("'$otfFont'");
Generate("'$ttfFont'");
Quit(0);'
ttf2eot $ttfFont > $eotFont
Assuming you have a font named FontName.otf, run:
sh otf2ttf2eot.sh FontName