Compress PDF

Reduce your PDF file size while maintaining quality

Compress PDF online quickly and reduce file size without losing quality. This tool helps you optimize large PDF files for email, sharing, or storage. Simply upload your PDF, compress it instantly, and download the optimized file.

How it works Instantly

Convert any file in 4 simple steps

01

Upload your file

Drag and drop or click to browse. Supports files up to 50 MB. Works from desktop, tablet, or mobile.

02

Choose your output format

Select from the available output formats. Options are filtered to what makes sense for your input file type.

03

Click Convert

Processing happens on our secure servers. Most conversions complete in under 10 seconds.

04

Download your file

Your converted file downloads directly. Both input and output files are deleted automatically after 2 hours.

All formats we support

PDF documents
PDF → DOCXPDF → XLSXPDF → JPGDOCX → PDFXLSX → PDFJPG → PDF
Convert PDFs to editable formats or create PDFs from Office documents and images.
Images
JPG → PNGPNG → JPGAny → WebPAny → GIFAny → BMPAny → AVIFAny → ICO
Convert between all major image formats with quality and resize controls.

What makes this converter different

No software needed
Use it right from your browser. Nothing to install. Works on Windows, Mac, Linux, iOS and Android.
Privacy first
Uploaded over HTTPS. Files deleted automatically within 2 hours. We never share your files.
High quality output
Powered by LibreOffice, Sharp, and pdf-lib — the same engines used by enterprise tools.
Generous limits
Up to 50 MB per file. No watermarks. No premium plans. Free means free.
Fast processing
Most conversions finish in under 10 seconds. No queue, no waiting.
Mobile friendly
Full converter on phones and tablets. Upload from camera roll, download directly.

Tips for best results

01

PDF to Word

PDFs with selectable text convert far better than scanned documents. Scanned PDFs need OCR for editable output.

02

Reduce image size

Convert JPG or PNG to WebP to reduce file size by 25–35% with minimal visible quality loss for most images — ideal for websites and email.

03

Images to PDF

Use JPG to PDF to combine multiple images into one document — great for sharing photo albums or scanned paperwork.

04

Compress PDF

Use Compress PDF before emailing large files. It repacks the PDF's internal structure losslessly — text-heavy documents shrink the most; image-heavy scans shrink less since images aren't re-encoded.

Frequently asked questions

Yes, our Compress PDF tool is completely free. You can reduce the size of your PDF files without any hidden charges or watermarks.

Yes, your files are uploaded over secure HTTPS connections. All PDFs are processed temporarily and automatically deleted within 2 hours to ensure your privacy.

It depends on the content of your PDF. This tool repacks the document's internal structure into compressed object streams — genuinely lossless, so text-heavy PDFs (reports, forms, documents with lots of repeated fonts/objects) shrink the most. It doesn't re-encode images, so a heavily scanned or image-based PDF will shrink much less — for those, smaller source images is the real fix, not a bigger compression setting.

No. The compression is structural, not visual — it only repacks how the PDF stores its internal objects, so there's no re-encoding of text or images and therefore no quality loss at all.

You can upload PDF files up to the supported limit (usually 50 MB). For larger files, you may need to compress them in parts.

Yes, the Compress PDF tool works on all devices including smartphones and tablets. You can upload, compress, and download files directly on your device.