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PDF Compressor

Compress PDF files directly in your browser. Remove metadata, flatten forms, and reduce file size — no files ever leave your device.

FreeNo SignupNo Server UploadsZero Tracking

100% Private

Your files never leave your browser. All processing happens locally on your device.

50

Lower values = smaller file size. Higher values = better quality.

Drop a PDF file here or click to browse

Select a PDF to compress
Embed code
<iframe src="https://noupload.dev/embed/pdf-compress" width="100%" height="600" frameborder="0" title="PDF Compressor - noupload"></iframe>
<p style="font-size:12px;text-align:center;margin-top:4px;">
  <a href="https://noupload.dev/tools/pdf-compress" target="_blank" rel="noopener">Powered by noupload</a>
</p>
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Powered by noupload

How to Use PDF Compressor

  1. 1

    Upload PDF

    Drag and drop a PDF file or click to browse and select one.

  2. 2

    Adjust compression

    Use the quality slider to control the compression level. Lower values produce smaller files.

  3. 3

    Review results

    See the original size, compressed size, and percentage reduction.

  4. 4

    Download

    Download the compressed PDF file.

Frequently Asked Questions

No. All compression happens entirely in your browser using the pdf-lib JavaScript library. Your files never leave your device.

The tool removes metadata, flattens form fields, and uses object stream compression to reduce file size. Results vary depending on the PDF content.

Text and vector content remain unchanged. The compression primarily targets metadata and structural redundancy in the PDF format.

There is no hard limit, but very large PDFs may be slow to process depending on your device's memory.

Some already-optimized PDFs may not compress further. In rare cases, adding object streams can slightly increase size for very small files.