OTS parsing error: incorrect file size in WOFF

This error can occur if you use a gulp or a grunt, forgetting to add fonts formats to src of task.

In my case, it happened when using gulp-rigger, which changes the contents of the file, taking it as text .

Since fonts file is a binary format, then output is broken file.

Fix for me:

gulp.task('start', function () { // with filter by file type (.js or .html) gulp.src(['./src/**/*.js', './src/**/*.html']) .pipe(rigger()) .pipe(gulp.dest('./target')); }); 

Instead:

gulp.task('start', function () { // all files, iclude fonts .woff gulp.src('./src/**/*.*') .pipe(rigger()) .pipe(gulp.dest('./target')); });