PDF Compressor

Compress PDF files online free — reduce file size with adjustable quality. No upload needed, 100% browser-based for complete privacy.

Drop your PDF file here or click to browse

.pdf · Your file never leaves your browser

How to Use

  1. 1

    Click "Browse" or drag and drop your PDF file into the upload area.

  2. 2

    Choose a compression level: Light (good quality), Standard (balanced), or Maximum (smallest size).

  3. 3

    Optionally switch to Custom mode to fine-tune DPI and JPEG quality settings.

  4. 4

    Click "Compress PDF" and wait for the processing to complete.

  5. 5

    Review the before/after file size comparison and download your compressed PDF.

Frequently Asked Questions

Is it safe to compress PDF files here?
Yes. Your PDF file never leaves your browser. All compression happens locally on your device using JavaScript — no data is uploaded to any server.
How does the compression work?
The tool renders each page as a JPEG image at your chosen quality and DPI settings, then rebuilds the PDF with the compressed images. This effectively reduces file size, especially for image-heavy PDFs.
Will the compressed PDF still have selectable text?
No. Since the compression works by re-rendering pages as images, text in the output PDF will be rasterized and not selectable. This trade-off enables significant file size reduction.
What compression level should I choose?
Use Light for documents you need to print or share professionally. Standard works well for most general use cases. Maximum is best when file size is the top priority, such as email attachments.

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