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Free Tool

Compress PDF Files Online — Free & Private

Reduce PDF file size instantly in your browser. No uploads, no servers, no account required. Perfect for email attachments, web uploads, and sharing large documents.

📄 PDF Compressor

100% browser-based · No uploads

Balanced (recommended) — best mix of size reduction and readability.

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Drop your PDF here
or click to browse — PDF files up to 50MB
Choose PDF
Supports: PDF  •  Max size: 50MB

How PDF Compression Works

1
Upload PDF
Select or drop your PDF — up to 50MB. No file is sent to any server.
2
Choose Quality
Pick High Quality, Balanced, or Maximum Compression based on your needs.
3
Auto Compress
pdf-lib processes your file locally — removing metadata, compressing streams, and optimising embedded images.
4
Download
Your compressed PDF is ready instantly. See the exact size reduction before downloading.

Why Choose Our PDF Compressor?

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100% Private Processing
Your PDF never leaves your browser. We use pdf-lib — a pure JavaScript library — for all compression. No server upload, no privacy risk.
Instant Results
Compression completes in seconds, even for large PDFs. No waiting in queue, no email delivery — just immediate download.
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Clear Size Comparison
See exactly how much space you saved — original vs compressed size shown side by side with percentage savings displayed clearly.
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Readability Preserved
Text remains crisp and fully selectable. We compress embedded images and remove redundant metadata without touching text rendering.
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Completely Free
No file limits, no credit system, no trial period. Compress as many PDFs as you need, completely free.
📱
Works on All Devices
Mobile, tablet, or desktop — our PDF compressor works on any device with a modern browser. No app download needed.

Perfect For Every Situation

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Email Attachments
Stay under email size limits (Gmail 25MB, Outlook 20MB)
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Web Uploads
Meet strict portal file size limits for job applications and forms
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Cloud Storage
Free up Google Drive, Dropbox, and OneDrive space
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WhatsApp / Telegram
Share documents over messaging apps with file size restrictions
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Government Portals
Submit tax returns and official documents within strict limits
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Academic Submissions
Submit research papers and theses within university portal limits

Frequently Asked Questions

Is the PDF compressor completely free? +
Yes — 100% free with no account, no subscription, and no limits on the number of PDFs you can compress. We are ad-supported, which allows us to keep the tools free for everyone.
Are my PDF files uploaded to your servers? +
Absolutely not. All PDF processing uses pdf-lib, a pure JavaScript library that runs entirely in your browser. Your PDF files never leave your device, ensuring complete privacy and security.
How much can I compress a PDF? +
Results vary significantly depending on PDF content. PDFs with many high-resolution images can often be reduced by 60–80%. Text-heavy PDFs with minimal images may only reduce by 10–30%. Our tool removes redundant metadata and optimises embedded images to achieve maximum reduction.
Will text still be readable and selectable after compression? +
Yes. Our compression focuses on embedded images and metadata. Text remains fully crisp, selectable, and searchable in the compressed PDF. The document structure is fully preserved.
What is the maximum PDF file size? +
You can compress PDFs up to 50MB. Very large files (30–50MB) may take 10–20 seconds to process in the browser. For extremely large PDFs, we recommend using our Maximum Compression setting.
Can I compress a password-protected PDF? +
Our tool currently cannot process password-protected or encrypted PDFs. You would need to remove the password protection first using another tool, then compress with our service.

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Also Need to Compress Images?

Our image compressor handles JPG, PNG, and WebP with the same privacy-first, browser-based approach.

🗜️ Compress Images Free