Compress PDF Online Free
Is your PDF too large to send by email or WhatsApp, or to upload to a website? Lumodocs Compress PDF shrinks the file while finding the best balance between quality and size. Compression runs in your browser, so the document is never uploaded to the internet.
How to use, step by step
- Step 1: Click Click to choose the PDF and select the file.
- Step 2: Under Compression options, choose Normal (keep 100%) to optimize without losing quality, or Advanced compression (images) to reduce the size a lot.
- Step 3: For advanced compression, enter the Target size (KB), the size you want to reach.
- Step 4: Choose the Conversion sharpness: Automatic (focuses on size), Good, High (small text readable) or Maximum quality (drawings and diagrams).
- Step 5: Click Compress PDF and download the result.
Tips
- Advanced compression turns pages into images: the text is no longer selectable.
- High or Maximum sharpness creates larger files; use it when the document has small print or technical drawings.
Frequently asked questions
How much smaller will my PDF be?
It depends on the content. PDFs with many images or scanned pages usually shrink a lot.
Does the quality get worse?
Stronger levels reduce the size more and may lower image sharpness. For text documents, the difference is usually small.
Is my file uploaded to a server?
No. Compression happens in your own browser.
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