How much can I reduce my PDF?

You can typically reduce file size by 50-90% depending on content. PDFs with many images compress best.

Will I lose quality when compressing?

Text and vector graphics stay sharp — only images are recompressed, which can cause minor quality loss that is rarely visible at normal viewing. Choose the compression level to suit your needs.

How do I compress a PDF for email (under 1 MB)?

Choose the High compression level — it targets the smallest size and is usually enough to get a typical document under common email limits. For image-heavy PDFs, High can reduce size by up to 90%.

Is it free to compress PDF?

Yes, PDF.dk offers free PDF compression. Free users can upload up to 20 files per month.

Why is my PDF so large?

PDFs usually grow large because of high-resolution images, embedded fonts or scanned pages. Compression downscales the images and strips redundant data so the file shrinks — while text and vector graphics stay sharp.

Which compression level should I choose?

Choose Low to preserve maximum quality (e.g. for print), Medium for everyday sharing, and High when the file needs to be as small as possible — for example to get under an email limit. You can always try again with a different level.

Is it safe to compress confidential PDFs online?

Yes. Your files are uploaded encrypted, processed on Nordic servers in the EU and deleted automatically shortly after — we never store them or share them with third parties. That makes PDF.dk suitable for confidential and GDPR-sensitive documents.

How do I make a PDF smaller without losing quality?

Upload your PDF and choose the Low or Medium level — we shrink the file by optimizing its images while text and graphics stay sharp. It is the easiest way to make a PDF file smaller with no visible quality loss.

Can I compress a PDF to a specific size, like 100 KB or 1 MB?

You cannot set an exact target size, but the High level produces the smallest file and gets most documents under 1 MB. If the file is still too large, split it with Split PDF and compress the parts individually.

Compress PDF

Compress PDF files online for free. Reduce file size up to 90% with minimal quality loss. Fast and secure PDF compression.

Large PDF files are hard to email, upload to portals, or share online. With PDF.dk you compress your PDF right in the browser and cut file size by up to 90%, free, watermark-free, and without sacrificing readability. Your files are processed on Nordic servers and deleted automatically.

Frequently Asked Questions

How much can I reduce my PDF?: You can typically reduce file size by 50-90% depending on content. PDFs with many images compress best.
Will I lose quality when compressing?: Text and vector graphics stay sharp — only images are recompressed, which can cause minor quality loss that is rarely visible at normal viewing. Choose the compression level to suit your needs.
How do I compress a PDF for email (under 1 MB)?: Choose the High compression level — it targets the smallest size and is usually enough to get a typical document under common email limits. For image-heavy PDFs, High can reduce size by up to 90%.
Is it free to compress PDF?: Yes, PDF.dk offers free PDF compression. Free users can upload up to 20 files per month.
Why is my PDF so large?: PDFs usually grow large because of high-resolution images, embedded fonts or scanned pages. Compression downscales the images and strips redundant data so the file shrinks — while text and vector graphics stay sharp.
Which compression level should I choose?: Choose Low to preserve maximum quality (e.g. for print), Medium for everyday sharing, and High when the file needs to be as small as possible — for example to get under an email limit. You can always try again with a different level.
Is it safe to compress confidential PDFs online?: Yes. Your files are uploaded encrypted, processed on Nordic servers in the EU and deleted automatically shortly after — we never store them or share them with third parties. That makes PDF.dk suitable for confidential and GDPR-sensitive documents.
How do I make a PDF smaller without losing quality?: Upload your PDF and choose the Low or Medium level — we shrink the file by optimizing its images while text and graphics stay sharp. It is the easiest way to make a PDF file smaller with no visible quality loss.
Can I compress a PDF to a specific size, like 100 KB or 1 MB?: You cannot set an exact target size, but the High level produces the smallest file and gets most documents under 1 MB. If the file is still too large, split it with Split PDF and compress the parts individually.

How to

Upload your PDF file by dragging it to the upload area or clicking "Choose file"
Select compression level: Low, Medium or High compression
Click "Compress" and wait while the file is processed
Download your compressed PDF file