Free Online PDF Compressor — Reduce PDF File Size

Reduce PDF file size instantly — choose your compression level, preview savings, 100% private.

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Compress PDF

Reduce file size • 4 compression levels • Instant download • No upload needed

🔒 100% Private

Drop your PDF here or click to select

PDF files only • All compression happens in your browser • No size limit

file.pdf 0 KB • 0 pages

Choose Compression Level

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Low

Maximum quality, minimal size reduction

~10–20% smaller

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Medium

Good balance of quality and size

~30–50% smaller

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High

Smaller file, some quality reduction

~50–70% smaller

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Custom

Set your own quality percentage

Full control

Quality: 60%

Advanced Options

Remove metadata Optimize object streams Remove unused objects Use compressed cross-reference

Something went wrong.

📂Loading

🔍Analyzing

⚙️Optimizing

📦Saving

✅Done

Loading PDF...

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Original Size

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Compressed Size

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Space Saved

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Pages

Size Comparison

Original

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Compressed

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Instant Processing

PDF compression happens directly in your browser. No waiting for server uploads.

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100% Private

Your PDF never leaves your device. We cannot see or access your files.

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No File Size Limit

Compress PDFs of any size — small reports or large presentations.

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Full Control

4 preset levels plus custom quality slider and advanced options.

Compress PDF is a free online tool that reduces the file size of your PDF documents instantly in your browser. No file is ever uploaded to any server — all compression happens locally on your device, keeping your documents 100% private and secure. Choose from multiple compression levels to balance file size and quality.

How to use: Drop or select your PDF file, choose your compression level (Low, Medium, High or Custom), then click Compress PDF. Download your compressed PDF immediately — no waiting, no limits.