Wash the cucumbers thoroughly to remove dirt.

Slice cucumbers and onions evenly.

Place cucumbers and onions in a large bowl, sprinkle with salt, and let sit for about 2 hours.

Rinse cucumbers and onions under cold water to remove excess salt.

In a large pot, combine sugar, vinegar, mustard seeds, celery seeds, turmeric, and cloves. Heat until the sugar dissolves.

Add the drained cucumbers and onions to the pot and stir well.

Carefully fill sterilized canning jars with the cucumber mixture, leaving space at the top.

Seal the jars and process them in a boiling water bath for 10 minutes.