How can I compress PDF files without losing quality?

Our PDF compressor uses smart optimization techniques to reduce file size while preserving document quality. Simply upload your PDF and let the tool do the rest.

Can I compress several PDF files at once?

Yes, our batch compression feature allows you to compress multiple PDF files simultaneously, saving you time and effort.

How to reduce PDF file size?

Click the Select PDF Files button to upload your PDF files. Our tool will automatically compress them, or you can adjust the compression settings manually.

Is the PDF compressor free to use?

Yes, our PDF compressor is completely free to use with no restrictions, file limits, or hidden fees.

What settings are adjustable in the PDF compressor?

You can adjust the compression level to control the balance between file size and document quality.

Is it safe to upload my PDF files?

The core compressor processes PDF files locally in your browser, so the files are not uploaded to our servers.

Compress PDF Online

Compress PDF files quickly online with our free size reducer.

or drag & drop PDF files here

Supports PDF

File Privacy

PDF processing happens locally in your browser; the core tool does not upload your files to our servers.

Smart PDF Compressor

Reduce PDF size when the source contains optimizable images. The amount saved depends on the document.

Fast and Easy

Compress PDF documents quickly with a simple, user-friendly interface.

Batch PDF Compressor

Compress multiple PDF files at once, saving time by reducing files in bulk.

Completely Free

Compress PDF files for free while checking the exported document before replacing your original.

Safe and Secure

Keep sensitive files on your device: the browser performs the core compression locally.

How to Compress PDF Files?

Click the "Select PDF Files" button to choose your PDF files.
The tool will automatically compress PDF files, or you can adjust the compression settings.
Click the "Download" button to save your compressed PDF files.

Batch PDF Compressor

Compress multiple PDF files at once for fast and efficient processing.

Compress multiple PDF documents simultaneously. Our PDF compressor is perfect for anyone who needs fast, efficient compression of multiple PDF files to reduce file size.

What PDF compression changes

PDF files can contain text, vectors, fonts and images. Most savings usually come from resampling embedded photographs. A text-only or already optimized PDF may show little change, while scanned documents can shrink substantially.

Recommended workflow

Keep a backup of the original PDF.
Start with moderate compression and process the file.
Check small text, charts, signatures and photos on several pages.
Compare size and readability before replacing the original.

Settings and file behavior

Image downsampling reduces pixel dimensions inside the PDF.
Lower image quality saves more space but may create artifacts.
Vector lines and live text should remain sharper than scanned text.
The ideal setting depends on screen viewing, email limits or printing.

Important limitations

Encrypted or damaged PDFs may not be supported.
Already optimized files may not become smaller.
Complex forms, signatures or uncommon features should be checked in a dedicated PDF viewer.

Practical recommendation

Use moderate compression for email and screen reading. Keep higher quality for contracts, fine diagrams, print jobs and scans where small characters must remain legible.

Compress PDF Frequently Asked Questions

Are you curious about how our PDF compressor works? Get all clear things up!