Free & Fast. No server uploads, no installs, no watermarks.

Compress PDF Files

File Analysis

Original Size —
Images Found —
Pages —
Est. Savings —

Compression Level

▶ Advanced Options
Image Quality ? Lower values = smaller file size, but images may look blurry. 70% is a good balance for most documents. 70%
Max Resolution ? Limits image dimensions. 150 DPI is ideal for screens. Use 300 DPI if you need to print the document.
Analyzing PDF...
Original
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Compressed
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⬇️ Download Compressed PDF

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How to Use This PDF Tool

  1. Select or drop a PDF file into the upload area.
  2. Review the file analysis to see potential savings.
  3. Choose a compression level:
    • Low: Best quality, modest size reduction.
    • Medium: Balanced quality and size (recommended).
    • High: Maximum compression with some quality loss.
  4. Optionally, expand Advanced Options to fine-tune settings.
  5. Click "Compress PDF" and wait for processing.
  6. Download your smaller PDF file.

Video Tutorial

About This Tool

This advanced PDF compressor intelligently reduces file size by optimizing embedded images while preserving text quality. Unlike basic compressors that convert everything to images, this tool analyzes your PDF and only recompresses what will actually benefit from compression.

The tool also optimizes PDF structure, removes unnecessary metadata, and can linearize your document for faster web viewing. All processing happens locally in your browser. Your files never leave your device.

Perfect for reducing large scanned documents, photo-heavy PDFs, or any file that needs to be emailed or uploaded to size-restricted forms.

When Compression Isn't Enough

Compression works best on image-heavy files, so if a mostly-text PDF still will not fit under an attachment limit, Split PDF can divide it into parts that each fit. Working the other direction, if you have just combined several documents with Merge PDFs, running the result through this tool is the natural last step before sending it.

And since a compressed file is usually about to be shared, Password Protect can lock it down first if the contents are sensitive.

FAQ

Why did my file get bigger?
This can happen with already-optimized PDFs or text-only documents. The tool will warn you if compression isn't recommended. Try using "Original" resolution in Advanced Options.

How much smaller will my PDF get?
It depends on the content. Image-heavy files such as scans and photo documents typically shrink by 50 to 80 percent, while text-heavy or already-optimized files may barely change, which the analysis box estimates for you before you commit. If the result would come out larger than the original, the tool tells you and keeps your original instead.

What's the difference between the compression levels?
Low preserves the most quality (85% image quality, original resolution). Medium balances size and quality (70%, 150 DPI). High prioritizes smallest size (50%, 100 DPI).

Will text become blurry?
No. Text in PDFs is stored as vector data and isn't affected by image compression. Only embedded images (photos, scans, graphics) are recompressed.

What does "Optimize for web" do?
It linearizes the PDF so the first page can display before the entire file downloads. Useful if you're publishing PDFs online.

Is my file uploaded anywhere?
No. Everything runs locally in your browser using JavaScript. Your PDF never leaves your device or gets uploaded to any server.