Free Online PDF Compressor

Reduce file size while keeping quality. Upload up to 5 PDFs and choose your preferred compression level.

Drag & drop up to 5 PDF files here, or click to select files

Compression Level

⚖️Balanced mode: sweet spot between quality and size!

Low

Medium

High

50%compression

Fast, Private, and High-Quality Compression

Optimize your PDFs for sharing, LMS submissions, and storage. The compressor keeps text and vectors crisp while smartly reducing image weight.

Local-only processing

Runs in your browser—documents never leave your device.

Multiple levels

Choose Low, Medium, or High depending on size vs. quality.

Batch friendly

Add up to five PDFs and compress them together.

Quality preserved

Text & vector graphics remain sharp; images are optimized.

Email-ready output

Hit common limits like 10–25MB quickly without re-authoring.

Cross-platform

Works on modern browsers across desktop and mobile.

How to Compress a PDF Online

Follow these quick steps to reduce file size while keeping your document readable and professional.

1
Upload your PDFs
Click Select files or drag & drop up to five PDFs.
2
Choose compression level
Pick Low, Medium, or High depending on size vs. quality needs.
3
Start compression
The tool runs locally and shows progress for each file.
4
Download results
Compare sizes and download optimized PDFs instantly.

Tips for the Smallest Size with the Best Look

Before you compress

Export your source document as a PDF with “optimize images” enabled if available.
Remove unused pages or large images that aren’t needed.
Prefer text and vector graphics over screenshots of text.

Choosing a level

Low: Small reduction, best visual fidelity for high-detail PDFs.
Medium: Balanced size and quality for everyday sharing.
High: Maximum reduction for email or portal limits—check images afterward.

Frequently Asked Questions

How do I compress a PDF without losing quality?

The tool optimizes embedded images and streams while preserving text and vector graphics. For most documents the visual difference is minimal, even at higher compression levels.

Is it safe to compress my PDF files here?

Yes. Processing happens locally in your browser and files are never uploaded to a server. Your documents remain on your device.

Is this PDF compressor free to use?

100% free to use with no signups or usage limits.

Can I compress multiple PDFs at once?

Yes, you can add multiple PDFs (up to 5 in one session) and compress them together.

Will the tool work on mobile?

Yes. It runs in modern browsers on desktop and mobile. Performance varies with device capability.

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Compression