Compress PDF
Make scanned and image-heavy PDFs easier to share, with single-file or batch compression.
Choose PDFs to compress
Choose one or more PDFs, or drop them here.
Your PDFs are processed locally in your browser and are not uploaded to a server.
Large or numerous PDFs may be limited by the available device memory.
How to use Compress PDF
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Click Choose PDFs or drag and drop one or more PDF documents into the upload area. Each accepted file appears with its name, size, and page count.
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Review your files before processing. Use Add PDFs to include more documents or the remove button beside a file to exclude it.
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Open Compression level and choose Preserve document structure, High quality, Recommended, or Smallest file. Preserve document structure retains the PDF's text and underlying content but may offer limited size reduction. The other three options compress pages as images, removing selectable text and interactive PDF features.
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If you uploaded a single document, customize its File name or keep the suggested name. For multiple PDFs, output filenames are generated automatically from the originals.
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Click Compress PDF to begin. The tool processes each document and displays its progress.
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Compare the original and resulting file sizes, including the percentage saved or any increase. Click Download beside an individual PDF, or Download all as ZIP when multiple files are available. Use Start over to begin with different documents.
Frequently asked questions
About Compress PDF
A PDF filled with photographs, scanned paperwork, or elaborate graphics can become inconveniently large, even when it contains relatively few pages. Compress PDF helps reduce that burden when preparing attachments for email, submitting documents through upload portals, or keeping a collection of digital records manageable. It supports both individual documents and batches, so you can optimize several unrelated PDFs in one session without combining them.
An important distinction sets the available compression methods apart. Preserve document structure rebuilds the PDF without deliberately converting its pages into images. This is the appropriate choice when maintaining existing text selection and the underlying document content matters more than achieving a dramatic reduction. However, the file may remain nearly the same size, and digital signatures can become invalid.
For documents primarily intended to be viewed or printed, three image-based settings offer a different approach. High quality favors clearer page reproduction, Recommended balances resolution against storage requirements, and Smallest file applies stronger image reduction. These methods recreate each page as a compressed image, which can substantially change the file's internal structure. Searchable text and interactive elements are lost, making these settings better suited to visual documents than editable forms or PDFs requiring accessible text.
The workspace displays page counts and original sizes before processing, then shows the resulting size and percentage difference for every completed file. This makes it possible to judge whether the reduction is worthwhile rather than assuming the smallest setting always produces the best outcome. Download results separately or collect multiple PDFs in a ZIP archive.
Compression runs entirely within your browser, and the original documents are left unchanged. Actual savings depend on the source material, the selected method, and the available device memory.