PDF Compressor

Upload PDF files

Drop up to 20 PDFs here

Max 50 MB per file

PDF DPI

144

Controls PDF image downsampling across the document.Compression quality

62%

Lower value gives smaller files. Higher value preserves more detail.

Convert to grayscaleReduces color information for smaller output PDFs.

About

About PDF compression

This tool reduces PDF file size by recompressing embedded image data and optimizing output settings. The goal is to keep documents readable while making uploads, sharing, and storage easier.

Tip: start with moderate settings first, then lower quality or DPI only if you still need a smaller file.

Compression quality

Lower quality usually gives smaller PDFs, while higher quality keeps more visual detail for images inside the document.

PDF DPI

DPI controls how strongly embedded images are downsampled. Lower DPI can reduce file size significantly for scan-heavy PDFs.

Grayscale mode

Converting to grayscale removes color data and can reduce output size, especially for colorful scans and image-heavy reports.

Batch compression

You can upload multiple PDFs at once and compress them in a single run. This helps when you need to process documents in bulk.

Download behavior

A single file is downloaded as a compressed PDF. Multiple files are bundled so you can download all compressed outputs together.

FAQ

PDF compressor FAQ

+Is this PDF compressor free to use?

Yes. You can compress PDF files directly in your browser from this page.

+Will compressed PDFs lose quality?

Some quality trade-off is normal when reducing size, especially for scanned or image-heavy documents. You can tune quality and DPI to find your preferred balance.

+Can I compress multiple PDF files at once?

Yes. Upload multiple PDFs and compress them together in a single run.

Overview

Free online PDF compressor

Compress PDF files online with adjustable quality, DPI, and grayscale options. Upload your files, tune settings, and download optimized PDFs in seconds.

Smaller PDF files are easier to share, faster to upload, and more efficient to store across workflows.