Highly repetitive data is where general-purpose compressors shine, often removing 90% or more.
—
80
Resize
50
Encoder detail
6
fastzopfli
256
28
0 lossless51 tiny
The largest saving available.
50
Speed, audio and advanced
8
0 smallest13 fastest
128
96
Advanced
8
Nearly all of the saving comes from the images inside.
150
75
Advanced
50
aggressivegentle
Advanced
14
coarsefine
0 merges only exactly equal vertices. A small value also closes hairline cracks left by CAD exporters.
Geometry only — texture coordinates,
materials and vertex colours are not carried through. Decimating a
UV-mapped mesh correctly is a much harder problem, and mangling your
UVs quietly would be worse than leaving them alone.
12
6
Advanced
ZIP and 7z. 7z encrypts the file list too.
What actually shrinks Text, logs and JSON files
Brotli frequently beats xz on source code and web assets, which contradicts the usual advice — the benchmark shows you which is true for your file.
Zstandard is the best balance of ratio against time for almost everything.
Long-range matching helps enormously on large files with distant repetition, such as concatenated logs.