Compress PDF Online – Reduce PDF File Size
Reduce the size of a PDF before sharing it. Choose modest optimization to keep text and layout, or a scanned-page mode that trades image quality for a smaller file.
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How to compress pdf
- Choose one PDF document.
- Select Keep text and layout, or a scanned-page quality setting.
- Select Compress PDF, review the reported size change, and download the result.
What to know before you start
Keep-text mode rewrites the PDF structure without recompressing embedded images. Scanned-page modes rebuild pages as JPEG images at 96, 120 or 150 dpi, capped at a 2,400-pixel longest edge. Selectable text, links, forms and annotations may be lost in these modes. If the result is not smaller, the original file is returned unchanged.
Frequently asked questions
Why did my PDF not get smaller?
Some PDFs are already optimized or contain mostly compact text. No mode can guarantee a reduction for every file.
Can I choose a target size, such as 100 KB?
This version offers quality presets, not an exact target size. The result depends on the document; input is limited to 300 MB and 500 pages.
Local processing, no sign-up
HappyPDF processes your selected files in this browser. An internet connection is needed to load processing software. Keep your original document and review the downloaded result; editing can affect forms, annotations and digital signatures.