PngDrop: Reduce the size of uploaded png's
lazarus / 39-Graphics

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Boleeman · 2026-01-13 01:12

Pngdrop

I had a 32bit version which I have now made for 64Bits compilation.

Added a topmost feature as well.
Drag one file at a time from explorer and it will reduce the png file
size (and colours and add dither) and even auto rename to new file
name.
There was a KMeans feature which was never implemented by the original
creator.
The source was originally found at https://github.com/c-yan/pngdrop

A nice program to use (It just works reliably)

I wonder if anyone can add multi-threading so that multiple files can
be drag and dropped?

Anyhow, enjoy the program and perhaps use it before uploading png's to
the forum to reduce their sizes.

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ALLIGATOR · 2026-01-13 03:05

Quote from: Boleeman on January 13, 2026, 02:12:48 amuse it before
uploading png's to the forum to reduce their sizes
Just for the record, in case anyone finds it useful, I reduce the size
of PNG files (usually screenshots) using the following pipeline:
1. I compress them using PNGQuant (it does roughly the same thing as
PngDrop, only more efficiently) - https://pngquant.org/
2. I compress them further using FileOptimizer (it compresses at the
compression algorithm level), which results in even more efficient
compression - https://nikkhokkho.sourceforge.io/?page=FileOptimizer
I do it in this order: first pngquant, then FileOptimizer

If anyone else likes these kinds of challenges, share your approaches
and we'll have a battle

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Boleeman · 2026-01-13 20:50

Tested out those other compressors (C coded) but still like the
Lazarus coded pngdrop.

pngquant renames the original png file and FileOptimizer is over 100Mb
in size