Compress PDF Online for Free
Shrink PDFs up to 90% — processed securely in seconds. No signup required.
Click to upload or drag and drop
PDF files up to 50 MB
or drop it here
Need more control? Open in Editor
PDF up to 50 MB · 3 free tasks per day
How to Compress a PDF
Upload your PDF
Click the upload area or drag and drop your PDF file into the tool above.
Choose compression level
Pick Low for lossless quality, Recommended for a balanced result, or Maximum for the smallest file size.
Download your compressed file
Click the download button to save your smaller PDF. That's it — no signup needed.
Why Use Our PDF Compressor?
Your files stay private
Basic compression runs entirely in your browser — nothing is uploaded. Advanced presets use our secure servers, where files are automatically deleted after processing.
Compressed in seconds
Basic mode runs instantly in your browser. Advanced presets use fast cloud processing — most PDFs finish in under 10 seconds.
Up to 90% smaller, same quality
Our engine optimizes images, fonts, and internal structure — removing bloat while keeping your PDF looking sharp. Choose from lossless to maximum compression.
Free with no catches
Compress up to 3 PDFs per day for free — files up to 50 MB. No watermarks, no account required, no limits on compression quality.
Common Uses for PDF Compression
PDF too large to email?
Shrink PDFs that are too large to email. Most email providers limit attachments to 25 MB — our compressor reduces file size by streamlining internal structure, helping many documents fit under the limit.
Save storage space
Save storage space on your device or cloud drive. Compressed PDFs take up less room without sacrificing readability.
Meet upload size limits
Meet file size requirements for job applications, government forms, university submissions, and other online portals that cap uploads at 5-10 MB.
Share files faster
Share smaller files faster over messaging apps, Slack, or file-sharing services. Smaller PDFs load quicker for recipients too.
Frequently Asked Questions
Is this PDF compressor free?
Yes, you can compress up to 3 PDFs per day for free without signing up. Need more? Grab a 24-hour unlimited day pass for $3.99 or go Pro for $12/mo.
Is it safe to compress PDFs online?
Yes. Basic compression runs entirely in your browser — your files never leave your device and no data is sent to any server. Advanced presets upload your file to our secure servers for deeper optimization, and files are automatically deleted after processing. Either way, no account or signup is required, and we never store or share your documents.
How much can I reduce my PDF size?
It depends on the PDF. Image-heavy documents (scans, photos) can shrink by 80-99%. Text-heavy PDFs with embedded fonts typically see 20-40% reduction. Already-optimized files may see smaller gains. Use the Recommended or Maximum preset for the best results.
Can I compress a PDF without losing quality?
Yes — you can compress a PDF without losing quality using the Low preset. It optimizes internal structure only, keeping your content pixel-for-pixel identical. The Recommended and Maximum presets recompress images for much greater size reduction, with quality carefully tuned so documents still look great on screen and in print.
What is the maximum file size I can compress?
Free users can compress PDFs up to 50 MB. Pro users can compress files up to 2 GB. Basic compression runs in your browser; advanced presets are processed on our secure servers with automatic deletion.
Can I compress multiple PDFs at once?
Free users can compress one PDF at a time, up to 3 per day. If you need more, grab a day pass ($3.99) for 24 hours of unlimited access, or upgrade to Pro ($12/month) for batch compression — upload multiple PDFs and compress them all in one go. There's no limit on how many files Pro users can process.
Does the compressor work on my phone?
Yes, our PDF compressor works on any modern browser — Chrome, Safari, Firefox, or Edge — on desktop, tablet, or phone. No app installation required. Just visit the page, upload your PDF, choose a compression level, and download the smaller file. The interface adapts to your screen size for a smooth experience on any device.
My PDF is too large to email. Can this help?
Yes — this is the most common reason people compress PDFs. Most email providers limit attachments to 25 MB. Our tool reduces file size by optimizing internal structure, which can be enough to get under the limit for many documents.
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