Image Viewer GitHub Repositories (2026) · Open Source Tools

Comic and Manga reader, written with Node.js and using Electron

A fast, beautiful image and video viewer that turns your media folders into a library.

Snappy and configuration-free text editor/IDE for the terminal. Suitable for writing git commit messages, editing Markdown, config files, source code, man pages and for quick edit-format-compile cycles when programming. Has syntax highlighting, jump-to-error, rainbow parentheses, macros, copy/paste portals, gdb, dlv and LSP support.

An open-source, web-based viewer for zoomable images, implemented in pure JavaScript.

A small Windows image viewer built with C#, Native AOT, Win32, and Direct2D.

Accessible, themeable React lightbox and gallery with zoom, video, slideshow and deep links. Zero runtime dependencies.

Practical and minimal image viewer

A fast and simple image viewer / editor for many operating systems

MulimgViewer is a multi-image viewer that can open multiple images in one interface, which is convenient for image comparison and image stitching.

Minimalist image viewer based on Leaflet.js and Electron.

The fastest Direct2D-powered image viewer for Windows. Features multi-threaded JXL/AVIF decoding, GPU acceleration, and a borderless geek UI. Supports WebP, RAW, & QOI with visual settings and auto-updates. Portable & SIMD-optimized.

claiming to be the best image viewer / photo collection browser

An image and texture viewer for tga, png, apng, exr, dds, pvr, ktx, ktx2, astc, pkm, qoi, gif, hdr, jpg, jxl, tif, ico, webp, avif, heic, and bmp files. Uses Dear ImGui, OpenGL, and Tacent. Useful for game devs as it displays information like the presence of an alpha channel and querying specific pixels for their colour.

A cross-platform image viewer which supports reading raw Luminance/YUV/RGB/ARGB/Bayer pixels data from file and rendering it.

Local-first AI image organizer and generative media library manager for ComfyUI, A1111, InvokeAI & more. Search huge output folders by prompt, model, LoRA, metadata or visual similarity.

High-performance document and image viewer that prioritizes screen space and control.

Claude Code plugin to see, review and iterate on your agent's work without leaving the terminal: show images, play videos, and run visual QA with Playwright recordings and before/after comparisons inside the Claude Code terminal. Works in any terminal that supports the kitty graphics protocol, fully cross-platform on macOS, Linux and Windows.

:rice_scene: a simple, minimalist, super fast image viewer using raw XLib

Open-source image viewer and editor for Linux. View HEIC, AVIF, JPEG XL, RAW previews, and Motion Photos in fullscreen or floating windows.

A WPF workspace for large images and whole-slide images, with layered annotations, MCP agent integration, and human-in-the-loop review.