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LottieOptim

npm bundle size npm

A simple and lightweight tool to optimise lottie files.

  • Reduced decimal precision (color values excluded)
  • Remove unused fields:
    • nm - After Effect's Name. Used for expressions.
    • mn - After Effect's Match Name. Used for expressions.
    • hd - Undocumented boolean that always seems to be false.
    • ks.r - Transform Rotation
    • ks.s - Transform Scale
    • ix - Effect Index. Used for expressions.
    • np - Group number of properties. Used for expressions.
    • cix - Undocumented number, always seems to be 2.
  • Minify JSON

Usage

npx lottie-optim [options] <file>

Options:
  -V, --version             output the version number
  -p, --precision <number>  Round numbers to a number of decimal places to reduce filesize (default: 2)
  -o, --out <file>          Output file, without this option the original file with be overridden
  -h, --help                output usage information

Example

npx lottie-optim -p 1 -o lottie.min.json lottie.json

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