Compress PDF Online

Optimize a PDF for sharing and storage. The converter keeps the original if recompression would make it larger. PDF compression can reduce embedded image sizes and optimize document data.

or drag and drop files here. Up to 50 MB each.

Convert to

Temporary files removed after responseSecure processingNo signup

Related converters

PDFConvert PDF to JPGConvert every PDF page into a numbered JPG image and download the complete set in one ZIP file.PDFConvert PDF to PNGConvert every PDF page into a numbered PNG image and download the complete set in one ZIP file.PDFPDF to Word ConverterConvert a PDF into an editable DOCX. Text is extracted from digital pages, and OCR can recognize scanned pages.DOCUMENTDOCX to PDF ConverterCreate a PDF copy of a DOCX Word document for sharing and consistent page-based viewing.

Compress PDF Online: format and use cases

PDF compression can reduce embedded image sizes and optimize document data. Results depend on how the source PDF was created; text-only or already optimized PDFs may show little or no reduction. Image compression can affect visual detail.

Why convert Compress PDF Online?

A smaller PDF is easier to attach, upload, and store when a service has a file-size limit.
Compression results vary: image-heavy documents may shrink more than text-only or already optimized PDFs.
The converter keeps the original when the processed version is not smaller.

Original vs optimized PDF

Compare typical format characteristics before choosing an output. Actual file size and quality depend on the source content and conversion settings.

Feature	Original PDF	Optimized PDF
Typical file size	Original PDF size	May be smaller; original is kept if not
Pages and text	Original pages and content	Pages and text retained
Image detail	Original embedded-image quality	May change with compression

How to convert Compress PDF Online

Choose a PDF file from your device or drag it into the upload area. The maximum upload size is 50 MB.
PDF is selected as the output format. Start the conversion when your file is ready.
Download the converted file when processing is complete.

Tip: Keep the source if you need a particular image quality. The converter reports the result and keeps the original when the processed file is not smaller.

Frequently asked questions

How much smaller will my PDF become?

The reduction depends on image content and existing compression. Some PDFs may not shrink.

Will compression remove pages from my PDF?

No. The converter optimizes the PDF and retains the original if the processed output is larger.

Is this compress pdf online tool free?

Yes. This converter is free to use and does not require an account.

Can I convert multiple files at once?

This tool processes one file per conversion. Convert each file separately.

How large can my upload be?

The maximum upload size for this conversion is 50 MB.

What happens to my uploaded file?

Server-side conversions use temporary files that are removed after the response finishes. Browser image conversions are processed locally. See the privacy page for details about deployment logs and optional OCR providers.

Looking for a different format? Browse the related converter category.