rsz

README

Installation • Command-line completion • Man documentation • Usage • CI Status • Contributing • License

rsz is a simple utility for image resizing.

Installation

From source

To build the rsz from scratch, make sure you have a working Go 1.19+ workspace (instructions), then:

go install github.com/essentialkaos/rsz@latest

Prebuilt binaries

You can download prebuilt binaries for Linux and macOS from EK Apps Repository:

bash <(curl -fsSL https://apps.kaos.st/get) rsz

Container Image

The latest version of rsz also available as container image on Docker Hub and GitHub Container Registry:

podman run --rm -it ghcr.io/essentialkaos/rsz:latest image.png 0.55 thumbnail.png
# or
docker run --rm -it ghcr.io/essentialkaos/rsz:latest image.png 0.55 thumbnail.png

Command-line completion

You can generate completion for bash, zsh or fish shell.

Bash:

sudo rsz --completion=bash 1> /etc/bash_completion.d/rsz

ZSH:

sudo rsz --completion=zsh 1> /usr/share/zsh/site-functions/rsz

Fish:

sudo rsz --completion=fish 1> /usr/share/fish/vendor_completions.d/rsz.fish

Man documentation

You can generate man page using next command:

rsz --generate-man | sudo gzip > /usr/share/man/man1/rsz.1.gz

Usage

Usage: rsz {options} src-image size output-image

Options

  --filter, -f name     Resampling filter name
  --list-filters, -F    Print list of supported resampling filters
  --no-color, -nc       Disable colors in output
  --help, -h            Show this help message
  --version, -v         Show version

Examples

  rsz image.png 256x256 thumbnail.png
  Convert image to exact size

  rsz -f Lanczos image.png 256x256 thumbnail.png
  Convert image to exact size using Lanczos resampling filter

  rsz image.png 25% thumbnail.png
  Convert image to relative size (25% of original)

  rsz image.png 0.55 thumbnail.png
  Convert image to relative size (55% of original)

CI Status

Branch	Status
master
develop

Contributing

Before contributing to this project please read our Contributing Guidelines.

License

Apache License, Version 2.0