PDF Compressor Online
APX Resizer compresses a PDF by re-saving it in a more compact form, directly in your browser. It works best on text-based PDFs, and your file is never uploaded.
Free. No sign-up. Your files stay in your browser.
How to compress a PDF
- Select Open PDF compressor and choose one PDF file.
- Run the tool.
- Download compressed.pdf and compare its size with the original.
What to expect
This tool applies structure-level compression: it rewrites the PDF using a more compact internal layout. That can reduce the size of text-based documents, but it does not recompress the pictures inside the file. Scanned or photo-heavy PDFs may shrink only a little, or not at all.
Tips for image-heavy PDFs
- Shrink the original photos with the image compressor.
- Rebuild the document with JPG to PDF on the tools page.
- If you only need some pages, use Split PDF, Extract Pages or Remove Pages to make the file smaller.
Private by design
APX Resizer works inside your browser. Your files are processed on your own device and are not uploaded to our servers. Read the privacy policy for details.
Frequently asked questions
How do I reduce the size of a PDF?
Open Compress PDF, choose your file, run the tool and download compressed.pdf. For PDFs full of photos, compress the images first and rebuild the PDF.
Why did my PDF not get much smaller?
Compress PDF only changes how the file is structured. It does not recompress images, so scanned or photo-heavy PDFs may change very little.
Is my PDF uploaded to a server?
No. The PDF is processed in your browser on your own device.
Can I compress several PDFs at once?
The tool works on one PDF at a time.
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Last updated: November 2026