pyoxipng

library9.1.1pypypi✓ verified 82d ago

Python wrapper for oxipng, a multithreaded PNG optimizer. Version 9.1.1 supports Python >=3.8 and is actively maintained. Releases follow oxipng upstream closely, typically every few months.

data devops

pip install pyoxipng

github ↗package ↗docs ↗changelog ↗

INSTALL

IMPORT

SIG · PYOXIPNG

pyoxipng

datapythonv9.1.1

harness data pending

Install & Compatibility

Where this runs

No compatibility data collected yet for this library.

Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

optimize

✓ from oxipng import optimize

✗ from pyoxipng import optimize_png

optimize_from_memory

✓ from oxipng import optimize_from_memory

RawImage

✓ from oxipng import RawImage

Read a PNG from file, optimize it in memory, and save the result.

from pyoxipng import optimize_png with open('input.png', 'rb') as f: data = f.read() result = optimize_png(data) with open('output.png', 'wb') as f: f.write(result)

Debug

Known issues

gotchaoptimize_png accepts bytes, not a file path. Passing a file path will fail silently or raise TypeError.

fix

Open the file in binary read mode and pass bytes.

affects: all

breakingVersion 7.0.0 changed the return type from (bytes, bool) to bytes. The second element (whether the image was changed) was removed.

fix

Update code from `result, changed = optimize_png(data)` to `result = optimize_png(data)`. Use `if result != data:` to check if optimized.

affects: >=7.0.0, <8.0.0

deprecatedThe `level` parameter in optimize_png is deprecated since 8.0.0, use `opts` dict instead.

fix

Replace `optimize_png(data, level=6)` with `optimize_png(data, opts=dict(level=6))`.

affects: >=8.0.0

Upgrade

Version history

9.1.1latest on PyPI · released Aug 21, 2025

Audit

Dependencies

pillowoptionalFor loading/saving images when using the Pillow integration

Agent activity

6 hits · last 30 days

node

Resources

githubhttps://github.com/nfrasser/pyoxipng ↗

packagehttps://pypi.org/project/pyoxipng/ ↗

docshttps://github.com/nfrasser/pyoxipng#readme ↗

changeloghttps://github.com/nfrasser/pyoxipng/blob/main/CHANGELOG.md ↗