Resize to a Specific File Size

Shrink a folder of JPG files below a set size in kilobytes. reaConverter picks the quality needed to hit your limit, and the same works from the command line.

How to reduce JPEG file size with reaConverter

This is particularly useful for web developers and designers who need to optimize their image files for faster loading times and improved website performance.

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1. Open Images

Open reaConverter and add one or more JPG files you want to resize. You can select them from a folder or add a folder altogether.

2. Add JPEG Resize Action

In the Image editing tab, go to Add action → Alteration and orientation → JPEG Resize

Here you can choose desired file size and jpeg quality.

3. Save the Result

Choose a destination folder for the output images.

Then simply press the Convert button and your processing will begin in no time!

Resize JPEG images on your PC

The fast and easy way to shrink JPG file size to a specific file size on your PC is to use reaConverter. The software runs completely offline, keeping your files safe and private.

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Reducing file size using command-line tool

You can also shrink file size with command-line interface, either manually or through automated scripts. reaConverter Pro includes a command-line tool called cons_rcp.exe — an advanced feature designed for professional use, available exclusively in the Pro edition.

JPEG resize example:

cons_rcp.exe -s "C:\Path_to\input_file.jpg" -o "C:\Path_to\output_file.jpg" -jpeg_resize s500 q80

Manual

-jpeg_resize (resizes image to make JPG file size smaller than x Kb)
  Optional parameters:
	  1. File size in Kb (Syntax: s500, integer)
	  2. Jpeg quality (Syntax: q80, integer from 1 to 100)
  Example:
    -jpeg_resize s500 q80

You are welcome to contact our technical support when you have any questions about reaConverter.