A small command-line application to view images from the terminal written in Rust. It uses lower half blocks (▄ or \u2584) to fit 2 pixels into a single cell by adjusting foreground and background colours accordingly.
viu will check the value of
$COLORTERM. If it contains either
24bit, truecolor (16 million colors) will be used. If not, it will fallback to using only ansi256. A nice explanation can be found in this gist.
Features (see Usage):
- Animated GIF support
- Accept media through stdin
- Custom dimensions
From source (recommended)
Installation from source requires a local Rust environment. Please note that at least Rust 1.39 is required.
git clone https://github.com/atanunq/viu.git # Build & Install cd viu/ cargo install --path . # Use viu img/giphy.gif
Or without cloning:
cargo install viu
First, you will need the WASI target installed in your Rust system:
rustup target add wasm32-wasi --toolchain nightly
Once WASI is available, you can build the WebAssembly binary by yourself with:
cargo +nightly build --release --target wasm32-wasi
This will create a new file located at
When the wasm file is created you can upload it to wapm or execute it with wasmer:
wapm publish # OR wasmer run target/wasm32-wasi/release/viu.wasm --dir=. -- img/giphy.gif
A precompiled binary can be downloaded from the release page.
Viu can be installed in Linux, macOS and Windows using wapm:
wapm install -g viu
There is an AUR package available for Arch Linux.
Ctrl-C was pressed to stop the GIFs.
viu ~/Pictures -rn
The shell will expand the wildcard above and
viu will display all the images in the folder one after the other. For a more informative output when dealing with folders the flag -n could be used.
viu receives only one file and it is GIF, it will be displayed over and over until Ctrl-C is pressed. However, when couple of files are up for display (second example) the GIF will be displayed only once.
If no flags are supplied to
viu it will try to get the size of the terminal where it was invoked. If it succeeds it will fit the image and preserve the aspect ratio. The aspect ratio will be changed only if both options -w and -h are used together.
Command line options
USAGE: viu [FLAGS] [OPTIONS] [FILE]... When FILE is -, read standard input. FLAGS: -m, --mirror Display a mirror of the original image -n, --name Output the name of the file before displaying -1, --once Only loop once through the animation -r, --recursive Recurse down directories if passed one -s, --static Show only first frame of gif -t, --transparent Display transparent image with transparent background -v, --verbose Output what is going on OPTIONS: -h, --height <height> Resize the image to a provided height -w, --width <width> Resize the image to a provided width ARGS: <FILE>... The image to be displayed