Examples · Real vips · JPG + PNG

Every format,
side by side.

One JPG and one PNG, each through the real compressor — before on the left, after on the right, honest numbers underneath. Before and after came straight out of the encoder, so what you see is what you get.

Download for Windows See the results →
2 sources · JPG · PNG · resize · defaults 85q / balanced / stripped
2 sources94.6% png→webp avgReal vips encoder
Settings

Each format, every option.

The JPG and PNG through the real compressor — keep format, convert to WebP/AVIF, or resize. Each is a real download.

JPG — original

windmill-abri.jpg
Original windmill photo
File size
3.4 MB · no compression
Dimensions
3456 × 2304 px
Format
JPG · q100
Download original

JPG — q85

windmill-abri-compressed.jpg
Compressed windmill photo at quality 85
File size
2.0 MB · as saved
Dimensions
3456 × 2304 px · unchanged
Format
JPG · q85 · mozjpeg
−41.7% · 1.45 MB saved Download 85q JPG

JPG — original

windmill-abri.jpg
Original windmill photo before resize
File size
3.4 MB · full res
Dimensions
3456 × 2304 px · 7.96 MP
Format
JPG · q100
Download full size

Resize → 1200px

windmill-abri-1200.jpg
Windmill photo resized to 1200 pixels wide
File size
229 KB · downscaled
Dimensions
1200 × 800 px · aspect kept
Format
JPG · q85 · Lanczos
−93.3% · 3.17 MB saved Download 1200px

JPG — q85

windmill-abri-compressed.jpg
Windmill JPG at quality 85
File size
2.0 MB · as saved
Dimensions
3456 × 2304 px
Format
JPG · mozjpeg · baseline
Download JPG

AVIF — q85

windmill-abri-compressed.avif
Windmill converted to AVIF
File size
2.0 MB · as saved
Dimensions
3456 × 2304 px · unchanged
Format
AVIF · q85 · AV1
−41.2% vs JPG Download AVIF

PNG — original

portrait-vandyck.png
Original Van Dyck portrait PNG
File size
2.4 MB · no compression
Dimensions
1332 × 1924 px
Format
PNG · 4-band RGBA
Download original

WebP — q85

portrait-vandyck-compressed.webp
Van Dyck portrait converted to WebP
File size
135 KB · as saved
Dimensions
1332 × 1924 px · unchanged
Format
WebP · q85 · VP8
−94.6% · 2.27 MB saved Download WebP

PNG — original

portrait-vandyck.png
Original Van Dyck portrait PNG
File size
2.4 MB · no compression
Dimensions
1332 × 1924 px
Format
PNG · 4-band RGBA
Download original

AVIF — q85

portrait-vandyck-compressed.avif
Van Dyck portrait converted to AVIF
File size
222 KB · as saved
Dimensions
1332 × 1924 px · unchanged
Format
AVIF · q85 · AV1
−90.9% · 2.18 MB saved Download AVIF

PNGs with flat color compress far more than photos — WebP/AVIF shine on scans and screenshots. Resize is the biggest lever of all.

The proof

Real engine, real numbers.

One photo (JPG) and one painting scan (PNG) from Wikimedia Commons, compressed with the actual vips engine at Quality 85 · balanced · metadata stripped. Nothing estimated, nothing hardcoded.

3456×2304
JPG source

Windmill Abri · 3.4 MB

1332×1924
PNG source

Van Dyck portrait · 2.4 MB

94.6%
png→webp avg

peak on this scan

93.3%
jpg resize max

3456 → 1200px

Wikimedia Commons · real vips 8.18.5 · 4 threads

Before → After

2 sources, honest results.

Every file's before and after, straight from the encoder. Download the original or the compressed result from public/examples/.

SourceDimensionsBeforeAfterSaved
Windmill Abri (JPG)3456×23043.4 MB2.0 MB−41.7%
Windmill Abri (JPG · resize)1200×8003.4 MB229 KB−93.3%
Van Dyck Portrait (PNG)1332×19242.4 MB135 KB−94.6%
Download

Grab the real files.

Originals and every result live in public/examples/ — read them, compare, or reuse.

Methods

How these were measured.

Reproduce it yourself — originals and script are in the repo.

2 sources — a JPG photo and a PNG painting scan from Wikimedia Commons.
Quality 85 · balanced · strip metadata — the app defaults.
4 threads — numbers are per-file, not per-batch averages.
Related

More to explore

Examples · Real results

See it yourself. Compress locally.

The same engine, on your own images — no upload.

Download for Windows Compress an image →
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