Compress PDF
Reduce the size of a PDF by removing metadata and optimizing the internal structure. No quality loss in images or text. 100% in browser.
Drag your PDF here or click to select it
Upload a PDF and choose the compression mode according to your needs.
Built by
Miguel Ángel Colorado Marin
Built by
Miguel Ángel Colorado Marin
Full-Stack Developer · Guadalajara, España
I develop web apps, digital tools and full projects — from design to deployment.
How to compress a PDF?
- 1
Upload the PDF
Drag your PDF file to the upload area or click to select it from your device. The original file size and the number of pages it contains are shown.
- 2
Review what will be optimized
The tool reports exactly what it will optimize: removal of document metadata (author, title, producer, creation and modification dates) and recompression of the internal structure with object streams, without touching the visual content at any point.
- 3
Compress and download
Click Compress & download. The tool processes the PDF in seconds and shows a report with the original size, the compressed size and the achieved reduction percentage. The optimized file downloads automatically.
Frequently asked questions
What exactly does this PDF compressor do?
It removes all document metadata (author name, title, subject, keywords, name of the creating program and creation and modification dates) and recompresses the internal PDF structure using PDF 1.5 standard object streams. It does not modify any visual content: images, fonts and text remain exactly the same.
How much space can I expect to save?
The savings depend on the specific PDF. PDFs with lots of metadata, uncompressed streams or generated with old tools or Word/LibreOffice exporters can be significantly reduced. PDFs that were already optimized or generated with modern tools may show little additional reduction, which is normal.
Is quality lost in PDF images or text?
No, not at all. This tool only optimizes the file structure by removing unnecessary data and applying compression at the object structure level. It does not recompress embedded images or modify any vector content, so the visual quality is identical to the original.
What is the purpose of removing PDF metadata?
PDF metadata can reveal private information: the real name of the document author, the organization, the editing software used, creation and modification dates, and sometimes even revision history. Removing them before sharing the PDF protects your privacy.
Are my PDFs sent to any server to be compressed?
No, not at all. All processing happens exclusively in your browser using the open source pdf-lib library. No PDF file leaves your device at any point. It is completely private and suitable for confidential documents or those with sensitive data.
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Embed the compressor on your site
Embed this PDF compressor in any web page with a simple iframe:
<iframe
src="https://miguelacm.es/embed/pdf-compress"
width="100%"
height="600"
frameborder="0"
title="PDF Compress"
></iframe>