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Q&A How to decrease image size from commandline

Problem I'd like to be able to decrease images, particularly jpg and png's, either to a percentage of the original file, or a specified size in bytes. MWE decrease --size=900KB -o image_small....

1 answer  ·  posted 1y ago by mcp‭  ·  edited 1y ago by mcp‭

#2: Post edited by user avatar mcp‭ · 2023-02-08T22:50:25Z (over 1 year ago)
Add comma
  • # Problem
  • I'd like to be able to decrease images, particularly jpg and png's,
  • either to a percentage of the original file, or a specified size in
  • bytes.
  • # MWE
  • ```sh
  • decrease --size=900KB -o image_small.png image.png
  • decrease --size=90% -o image_small.png image.png
  • ```
  • # Notes
  • It can be two separate tools, but I want them to support both options,
  • and ideally follow proper Unix option dash conventions (`--out=file`, `-o
  • file`).
  • For jpg, I found `jpegoptim` which allows me to specify a size in either
  • kilobytes or percentage:
  • ```sh
  • jpegoptim --size=900 --dest=compressed image.jpg
  • jpegoptim --size=90% --dest=compressed image.jpg
  • ```
  • One downside of this though is it does not have a `-o` option to create
  • a new file; it either overwrites the input file, or takes in an output
  • directory that must exist ahead of time.
  • # Problem
  • I'd like to be able to decrease images, particularly jpg and png's,
  • either to a percentage of the original file, or a specified size in
  • bytes.
  • # MWE
  • ```sh
  • decrease --size=900KB -o image_small.png image.png
  • decrease --size=90% -o image_small.png image.png
  • ```
  • # Notes
  • It can be two separate tools, but I want them to support both options,
  • and ideally,[]() follow proper Unix option dash conventions (`--out=file`, `-o
  • file`).
  • For jpg, I found `jpegoptim` which allows me to specify a size in either
  • kilobytes or percentage:
  • ```sh
  • jpegoptim --size=900 --dest=compressed image.jpg
  • jpegoptim --size=90% --dest=compressed image.jpg
  • ```
  • One downside of this though is it does not have a `-o` option to create
  • a new file; it either overwrites the input file, or takes in an output
  • directory that must exist ahead of time.
#1: Initial revision by user avatar mcp‭ · 2023-02-08T17:35:19Z (over 1 year ago)
How to decrease image size from commandline
# Problem
I'd like to be able to decrease images, particularly jpg and png's,
either to a percentage of the original file, or a specified size in
bytes.

# MWE
```sh
decrease --size=900KB -o image_small.png image.png
decrease --size=90% -o image_small.png image.png
```

# Notes
It can be two separate tools, but I want them to support both options,
and ideally follow proper Unix option dash conventions (`--out=file`, `-o
file`).

For jpg, I found `jpegoptim` which allows me to specify a size in either
kilobytes or percentage:
```sh
jpegoptim --size=900 --dest=compressed image.jpg
jpegoptim --size=90% --dest=compressed image.jpg
```

One downside of this though is it does not have a `-o` option to create
a new file; it either overwrites the input file, or takes in an output
directory that must exist ahead of time.