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Free Web Tool

PDF Compressor

Reduce PDF file size directly in your browser. Choose a compression level, drop your files, and download smaller PDFs instantly. Nothing is uploaded.

Recommended reduces 40-70% with good readability. Choose Extreme for email attachments.

Shrink PDFs without uploading them

Most PDF compressors send your files to a remote server for processing, which means your contracts, invoices, and personal documents sit on infrastructure you do not control. This tool uses your browser's built-in rendering engine to rasterize each page at a controlled quality level, then rebuilds a clean, compact PDF from those images. The result is a dramatically smaller file that looks identical at normal viewing sizes — and your data never leaves your device.

Perfect for reducing file size before emailing, uploading to portals with size limits, or archiving documents that don't need to be searchable.

Frequently Asked Questions

Are my PDF files uploaded to a server?
No. Your files are processed entirely in your browser using JavaScript. Nothing is uploaded, stored, or transmitted. The compression happens on your own device, so confidential documents stay private.
Which compression level should I choose?
• Extreme: Best for email attachments and quick sharing. Reduces size by 60-90% but images may look softer on close inspection. • Recommended: Good balance between size and quality. Usually reduces 40-70% while keeping text readable. • Low compression: Minimal visual loss, typically 20-40% reduction. Best when you need near-original quality.
Is there a file size limit?
There is no hard limit, but very large PDFs (over 100 MB or 200+ pages) may be slow to process since everything runs in your browser. For best results, compress files under 50 MB. You can always try larger files — the tool will report progress page by page.
How does browser-based PDF compression work?
The tool renders each page of your PDF to a canvas element, re-encodes it as a compressed JPEG image, then rebuilds a new PDF from those images. This removes unused objects, embedded fonts, and metadata while keeping the visual appearance intact.
Will my text still be selectable after compression?
No. This compressor rasterizes pages into images for maximum size reduction. If you need selectable text, consider using a tool that only re-compresses embedded images while leaving text intact (requires server-side processing).
Can I compress password-protected PDFs?
No. Password-protected PDFs cannot be read by the browser. You need to remove the password first using our Unlock PDF tool, then compress the resulting file.

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