Online PDF Compressor
Our web-app will compress almost any PDF by a factor of up to 90%. The reduction of filesize reached depends on the properties of your input file.
Free PDF Compressor Online
Reduce the file size of your PDF online for free – ideal for email attachments and uploads. Our compressor finds the best balance between file size and quality. It even works for files larger than 1 GB.
- 1Step 1: Click on the upload box and select the PDF you want to compress or just drag it there.
- 2Step 2: Wait for the compression to finish. This usually just takes a short moment.
- 3Step 3: Click "Download" to retrieve the result. The app will inform you about the compression level reached.
SSL encrypted
Deleted after 2 hours
100% free
Features
Sending Large PDFs by Email
Many email providers limit the size of attachments which can cause a problem if you want to send a large PDF via mail. Our service allows you to get your large PDFs ready for sharing them via mail.
Unlimited Free PDF Compressions
The usage of our app to compress PDFs is 100% free. No page limitations. No hidden costs.
File Size vs. Quality
Compression always comes along with a quality loss. Our algorithm tries to find the best compromise between PDF filesize and quality when shrinking your document.
No Software Download
You do not have to download and install any additional software on your device when using our app to compress PDFs online.
Privacy Protection
Your privacy is important for us. Your PDFs will be deleted from our servers after the conversion immediately. We will not share them or even just look at them.
Why Compress a PDF?
Large PDFs are hard to send by email, slow to upload and take up storage space. Compressing them reduces images and removes unnecessary data, so the document looks almost the same but needs much less space.
Frequently Asked Questions
How do I compress a PDF?
Click the upload box or drag your PDF onto it. The compression starts automatically, and after a short moment you can download the smaller file.
How much smaller will my PDF get?
That depends on the file. PDFs with many images can often be reduced by up to 90%, while files that are already optimized shrink less.
Does compression reduce the quality?
Compression always means a small loss of image quality. Our algorithm keeps text sharp and looks for the best compromise between file size and quality.
Is it safe to upload my PDF?
All transfers are SSL-encrypted, nobody looks at your files, and everything is deleted automatically within two hours.
Do I need to install software?
No. The PDF compressor works online in any browser on Windows, Mac, Linux, iPhone and Android.
Why is my PDF file so large?
Most of the size usually comes from images: photos, scanned pages or high-resolution graphics. Embedded fonts and duplicated objects add more. Scanned documents are especially large, because every page is stored as a picture.
Will my PDF be small enough for an email attachment?
In most cases, yes. Many email providers accept attachments up to about 20–25 MB, and PDFs with many images often shrink well below that. After the compression we show how large the new file is compared to the original.
Can I still print the compressed PDF and select the text?
Text stays sharp and selectable, because only the images are reduced – to a resolution that looks good on screens. For high-quality printing of photos, keep your original file as well.