🌐 english | český | русский

FLR Optimizer is a AWK-based script for optimizing JSON formatted FLR files (exported from Rive). This experimental script was greatly influenced by the SVGO project. Please don't take it too seriously. ☺️

FLR files, especially those exported in JSON format, usually contain a lot of useless information. Such as non-optimal, too long values and so on, that can be safely converted without affecting the FLR rendering result much.

AWK is a domain-specific language designed for text processing and typically used as a data extraction and reporting tool. It is a standard feature of most Unix-like operating systems, such as macOS and Linux distributions.

Note about Windows: AWK is not available in Windows by default. Please use either gawk (you will need to change the command syntax a little) or in Windows 10 (from build 14328 and later), simply run a command from Linux Bash Shell (i have personally tested it there too).

In terminal navigate to folder with your FLR file and run following command:

awk '{
    while (match($0, /[0-9]+\.[0-9]+/)) {
        printf "%s%.2f", substr($0, 1, RSTART-1), substr($0, RSTART, RLENGTH)
        $0 = substr($0, RSTART+RLENGTH)
    }
    print
}' original.flr > optimized.flr

• 2f is the number of digits after the decimal point (I do not recommend reducing it below 2).
• original.flr is the name of your FLR file.
• optimized.flr is the name of optimized FLR file.

The FLR file from the assets folder, in this repository, was optimized by this script. To test results of this script — please run following commands in terminal:

flutter upgrade
git clone https://github.com/tsinis/flro.git
cd flro
flutter create .
flutter run

This project is released under the terms of the MIT license.