Remove padding/margin from JavaFX Label

One of the more dynamic ways to do this is to use a Text instead of a Label and set the boundsType as VISUAL. This results in a Text without any padding on the any of the sides of the Text, irrespective of the font size.

Text text = new Text();
text.setBoundsType(TextBoundsType.VISUAL);

You can achieve that by adding -fx-padding: -10 0 0 0; to the list of your styles.

For more flexible solution you can use FontMetrics information:

FontMetrics metrics = Toolkit.getToolkit().getFontLoader().getFontMetrics(label.getFont());
label.setPadding(new Insets(-metrics.getDescent(), 0, 0, 0));

NB: You need to call that code after scene.show(). Before that graphics engine is not ready to provide correct metrics.

For me it was easiest to just use setPadding.

label.setPadding(new Insets(-2,0,0,0)); //top, right, bottom, left

This way I did not have to deal with the css-style sheet.