xlsx spreadsheet generation with charts, images, automated column width, customizable styles and full schema validation. Axlsx helps you create beautiful Office Open XML Spreadsheet documents (Excel, Google Spreadsheets, Numbers, LibreOffice) without having to understand the entire ECMA specifica...

Command line tool and ruby interface to optimize (lossless compress, optionally lossy) jpeg, png, gif and svg images using external utilities (advpng, gifsicle, jhead, jpeg-recompress, jpegoptim, jpegrescan, jpegtran, optipng, oxipng, pngcrush, pngout, pngquant, svgo)

Offload CarrierWave's image processing and storage to a background process using Delayed Job, Resque, Sidekiq, Qu, Queue Classic or Girl Friday

Jammit is an industrial-strength asset packaging library for Rails, providing both the CSS and JavaScript concatenation and compression that you'd expect, as well as YUI Compressor and Closure Compiler compatibility, ahead-of-time gzipping, built-in JavaScript template support, an...

MetaInspector lets you scrape a web page and get its links, images, texts, meta tags...

HexaPDF is a pure Ruby library with an accompanying application for working with PDF files. In short, it allows creating new PDF files, manipulating existing PDF files, merging multiple PDF files into one, extracting meta information, text, images and files from PDF files, securing PDF files by ...

HexaPDF is a pure Ruby library with an accompanying application for working with PDF files. In short, it allows creating new PDF files, manipulating existing PDF files, merging multiple PDF files into one, extracting meta information, text, images and files from PDF files, securing PDF files by ...

An extension for Asciidoctor to convert diagrams to images using https://kroki.io

EXIF Reader is a module to read EXIF from JPEG and TIFF images.

Automatically transforms urls (via domain) and includes the destination resource (Vimeo, YouTube movie, image, ...) in your document

Wrapper on ffmpeg and imagemagick to convert .mov to .gif

Uses wkhtmltoimage to create Images using HTML

LiveReload is a Safari/Chrome extension + a command-line tool that: 1. Applies CSS and JavaScript file changes without reloading a page. 2. Automatically reloads a page when any other file changes (html, image, server-side script, etc).

Combines individual images from a directory into a single sprite image file and creates an appropriate CSS stylesheet

Send image/video to an airplay enabled device

Captcha Gem for Rails, which generates captcha image by Rust.

A beautiful WYSIWYG editor with image uploads for Rails.

Codebase as structure of locatable classes and methods based on the Ruby AST

A beautiful WYSIWYG editor with image uploads for Rails (backported to Rails 3).

This gem allows you to render SVG directly into a PDF using the 'prawn' gem. Since PDF is vector-based, you'll get nice scaled graphics if you use SVG instead of an image.