Catalog app · RISC-V VM

Run oxipng in the browser

Shrink PNG files losslessly by re-encoding them with better compression settings.

Try it live

Nothing is downloaded until you press Run.

catalog app

Check the installed oxipng build

Installs oxipng 10.1.1 from the signed catalog (every chunk is verified before it is written), then runs the commands below in the VM's shell.

bash

oxipng --version
oxipng --help | head -n 3

loading…

Expected output

$ oxipng --version
oxipng 10.1.1
$ oxipng --help | head -n 3
Losslessly improve compression of PNG files

Usage: oxipng [OPTIONS] <files>...

What it is

oxipng tries combinations of filters and deflate settings and keeps the smallest result, without changing a single pixel; it can also strip metadata.

Package facts

version: 10.1.1
runs on: RISC-V VM (elf-app, riscv64gc-linux-musl)
download: 666 kB compressed · 1 file
command: oxipng
requires: nothing else — a static binary
license: MIT (upstream)
upstream: github.com/oxipng/oxipng
categories: Images
catalog: generation 12, Ed25519-signed

Install and run it from your page

With the SDK, installApp resolves oxipng in the signed index, fetches its content-addressed chunks from the CDN, verifies each one and writes the files into the VM. Details in Installing catalog apps.

javascript

import { createNano } from "@userland-run/nano-sdk";

const nano = await createNano({ image: { wasm: "/nano/console.wasm" }, ramMB: 512 });
await nano.installApp("oxipng"); // signature-verified, cached in OPFS

const r = await nano.shExec("oxipng --version");
console.log(r.stdout);

Typical usage of the upstream command-line tool: