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Compress PDF

Compress your PDF to reduce file size without significant quality loss. Great for email attachments and web uploads. Choose your compression level — from maximum compression to best quality. Processing is done entirely in your browser.

Preparing the local PDF workspace

The instructions, FAQ, privacy notes, and related tools are already available while the browser-only editor initializes.

Practical guide for Compress PDF

Example use case

Reduce a 12 MB presentation PDF to a smaller attachment that fits an email limit while keeping text and charts readable.

Settings explained

  • Higher compression usually makes smaller files but may reduce image quality.
  • Documents made mostly of scanned images benefit more than text-only PDFs.
  • Output size depends on the original images, fonts, and embedded objects.

Limitations

  • Already-optimized PDFs may not shrink much further.
  • Heavy compression can make photos or scans look softer.
  • Some embedded objects cannot be reduced by browser-only compression.

Troubleshooting

  • If the PDF is still too large, try a stronger compression level.
  • If scans look blurry, use a lighter compression setting.
  • If the file barely changes, the original PDF may already be optimized.

How It Works

1

Upload a PDF

Choose the PDF file you want to make smaller.

2

Pick compression

Select a compression level that balances size and visual quality.

3

Download result

Review the reduced file size and download the optimized PDF.

Frequently Asked Questions

Why did my PDF not shrink?

Text-heavy or already-optimized PDFs often have little redundant data left to remove.

Does compression change the text?

The goal is to reduce size while keeping readable content, but always review important documents before sharing.

Is this tool free to use?

Yes, this tool is 100% free to use. No sign-up, no limits, and no hidden fees. All processing happens locally in your browser — nothing is ever uploaded.

Is my file safe?

Your files never leave your device. All processing is done locally in your browser using client-side JavaScript. Your files are never uploaded to any server, so your privacy is completely protected.

Do I need to create an account?

No sign-up required. You can use this tool immediately without creating an account or providing any personal information.