iv

iv is a lightweight image viewer for Unix-like systems, using SDL2 and OpenGL. It requires minimal libraries and is reasonably fast with large images.

Features:

• multithreaded JPEG decoder
• no real image size limit beyond available memory
• scrolling/zooming/... speed is independent of image size
• only depends on SDL2 and legacy OpenGL (some loaders depend on additional libraries)
• formats supported: JPEG, BMP, PNG (requires zlib), GIF (non-animated only), TGA, AVIF (requires libavif), PCX, WebP (requires libwebp), TIM (PlayStation format), Netpbm (PBM, PGM, PPM, PAM and PFM), plus all retro formats supported by RECOIL (Amiga .HAM, .LBM, .IFF, MSX .MAG and .SC6, etc), plus TIFF, DDS, XBM, XPM and more supported via scripts wrapping ImageMagick
• also provided is a raw bits image viewer (specify image dimensions and pixel format), and an any-to-ppm converter (ivtoppm)
• additional formats are very easy to prototype with scripts like this (using ImageMagick):

  #!/bin/sh
  # SPDX-License-Identifier: GPL-2.0
  
  convert ico:- png:- | iv-png
  
  

License is GPLv2

User: guest, password: guest (info)
iv-1.7.tar.xz [SIG]	source code	90 KB	2026-May-05
Changes/fixes: Add native loaders for TGA and PCX BMP loader fixes Print text content inside PNG files
iv-1.5.tar.xz [SIG]	source code	84 KB	2026-Mar-21
Changes/fixes: Replace Netpbm loader (ImageMagick-based script) with a native program. Add the ivtoppm program, which converts any image loadable by iv into a .ppm file Minor bug fixes
iv-1.4.tar.xz [SIG]	source code	79 KB	2026-Mar-16
Changes/fixes: Support FreeBSD Add little-endian 16-bit modes to ivraw Build system fixes
iv-1.2.tar.xz [SIG]	source code	78 KB	2025-Dec-06
Changes/fixes: Replace webp script with a native program using libwebp Don't reset flip flags when changing view modes
iv-1.1.tar.xz [SIG]	source code	77 KB	2025-Nov-21
Changes/fixes: Fix recognition of .jpc and .jp2 files Implement the --at option
iv-1.0.tar.xz [SIG]	source code	77 KB	2025-Nov-20
Initial public release.