Adobe's Fireworks saves larger PNG files than many programs by default. This stems from the mechanics of its Save format: the images produced by Fireworks' save function include large, private chunks, containing complete layer and vector information. This allows further lossless editing. When saved with the Export option, Fireworks' PNGs are competitive with those produced by other image editors, but are no longer editable as anything but flattened bitmaps. Fireworks is unable to save size-optimized vector-editable PNGs.
Adobe's Fireworks saves larger PNG files than many programs by default This stems from the mechanics of its Save format the images produced by Fireworks' save function include large private chunks containing complete layer and vector information This allows further lossless editing When saved with the Export option Fireworks' PNGs are competitive with those produced by other image editors but are no longer editable as anything but flattened bitmaps Fireworks is unable to save size-optimized vector-editable PNGs