72 votes63 comments · Illustrator (Desktop) Feature Requests » File Save, Import and Export · Flag idea as inappropriate… · Admin →Under Review · AdminNitish Agarwal (Illustrator on iPad Team) (Lead Software Engineer, Adobe Illustrator) responded
If you will export artboards in any fractional scale or by specifying height and width you will get correct output.
The best way to not get an extra pixel is keep your artboard coordinates in integers. You can achieve that by changing the reference point of artboard to top left and typing in the nearest integer or do Make Pixel Perfect(Object > Make Pixel Perfect). If size of your artboard is increased please manage that accordingly and export.
Thanks & Regards
An error occurred while saving the commentSharon Dean commented
I had the same issue until I made sure my art boards lined up on both X and Y axis on whole pixels (ie: x: 25 not x: 25.22 ) . When one of the axises is a decimal, it will add a pixel when exporting.