Best PDF compressor software for mac for reducing PDF file size?

Automator is Mac’s built-in automation tool. You can create a workflow to batch-compress PDFs, turning it into a built-in PDF compressor for mac. This method requires no third-party software and supports batch processing of multiple files at once.

Instructions: Open Automator and create a new application. Find the Compress PDF action and drag it into the workflow, then save the workflow as an application. Drag and drop PDF files onto the application icon to compress them in batches.

Pros: Pre-installed in macOS; supports offline batch compression of PDFs.

Cons: It uses the Preview app’s compression engine, has limited quality adjustment options, and often over-compresses embedded images.

Notes

• Keep a copy of the original PDF file before compression, as any loss of image quality after compression cannot be restored.
• Please carefully check the output file; avoid using this workflow for PDFs containing high-resolution images.
• You can add folder filtering rules to the workflow to further automate the process.

This native automation tool offers a simple built-in option: PDF compressor for mac. It is ideal for users who frequently work with multiple simple PDF files and are comfortable with a fixed compression quality.