How do I compress a PDF online?

Upload your PDF to PeachPDF's Compress PDF tool and we will automatically reduce the file size. Download your compressed PDF instantly — no sign-up needed.

Will compressing a PDF reduce its quality?

Our tool is designed to reduce file size while keeping visual quality as high as possible. For most documents the difference is not noticeable.

Is the Compress PDF tool free?

Yes, completely free. No sign-up, no watermark, no limits on number of uses.

Home → All Tools → Compress PDF

🗜️ Free Online Tool · No Sign-up · No Watermark

Compress PDF & Reduce File Size

Make your PDFs smaller without losing quality. Fast and 100% free.

🗜️

Drop your PDF here

or click to browse your files

Supports PDF up to 100MB · Files deleted after processing

🔒 SSL Encrypted 🗑️ Auto-deleted ⚡ Instant 💸 Always Free 📱 Mobile Friendly 🚫 No Watermark

How It Works

3 Simple Steps

Upload Your PDF File

Click or drag & drop your PDF file. Files up to 100MB are supported for free.

Choose Compression Level

Select Light, Balanced or Maximum compression depending on your quality and size needs.

Download Compressed PDF

Your compressed PDF is ready in seconds. Download it and see the dramatic size difference.

About This Tool

Why Compress a PDF? Everything You Need to Know

Large PDFs can be slow to send and hard to upload. PeachPDF's compressor reduces file size dramatically — often by 70-80% — while preserving readability and image quality. Choose from light, balanced, or maximum compression based on your needs.

PDF compression is essential for emailing documents within attachment size limits, uploading to portals with file size restrictions, storing documents efficiently, and sharing reports quickly. Our tool uses advanced compression algorithms that optimize images, remove redundant data and compress text streams — all while keeping your content perfectly readable.

Pro Tips

Expert Tips & Tricks

💡Choose Balanced compression for the best quality-to-size ratio for everyday professional use.

💡Maximum compression is ideal for archiving documents where file size matters most over image quality.

💡Always keep a backup of your original PDF before compressing as the process cannot be reversed.

FAQs

Frequently Asked Questions

How much can I reduce my PDF size?▼

Most PDFs can be reduced by 50-80% depending on content. Image-heavy PDFs compress the most significantly.

Will compression affect text quality?▼

No. Text remains perfectly sharp after compression. Only images are lightly optimized at moderate settings.

Can I compress a PDF multiple times?▼

Yes but there are diminishing returns. We recommend compressing once using Maximum compression for best results.

Can I compress password-protected PDFs?▼

You need to unlock the PDF first using our Unlock PDF tool, compress it, then re-add protection if needed.

What is the maximum file size I can compress?▼

You can compress PDF files up to 100MB for free on PeachPDF with no account required whatsoever.