PDFPDF→JPG

Compress PDF (Image-Based)

Shrink heavy, scan-based PDFs by re-rendering their pages at a leaner resolution and quality.

Compress PDF

Drag & drop a file here, or

Accepts .pdf

  1. Upload the oversized PDF.
  2. Pages are re-rendered at an optimised, lighter resolution.
  3. Download the slimmed-down result.

Email gateways and upload forms routinely cap attachments at 5–10 MB, and scanned PDFs blow past that easily. This tool re-renders each page at a leaner 110 DPI and a moderate JPG quality, then lets you rebuild the document — a reliable way to drag a bloated scan back under the limit. It is tuned for scan-heavy and image-heavy PDFs, where most of the weight lives in the pictures rather than the text layer.

Where the weight in a heavy PDF actually lives

Before you compress, it helps to know what is making a PDF fat. A text-only export from a word processor is usually tiny, because letters are stored as compact font instructions. The files that balloon to 30 or 40 megabytes are almost always scans, where every page is a full-resolution photograph of paper. A flatbed scanner set to 600 DPI produces gorgeous detail nobody needs for reading on screen, and that excess data is pure dead weight in an email attachment.

This tool targets that exact problem. It re-renders each page at a leaner 110 DPI and a moderate JPG quality, discarding the resolution you cannot see anyway. That is why scan-based PDFs commonly shrink by 50 to 80 percent here, while a lean text document barely changes. If your goal is images rather than a smaller PDF, the PDF to JPG converter is the better starting point.

Compress to fit email and upload limits

Most email providers cap attachments around 25 megabytes, and many web forms are stingier still at 5 or 10. A 35 MB scanned contract simply will not send, and bouncing it back and forth wastes everyone's afternoon. Shrinking it once, here, solves the problem at the source rather than forcing the recipient to chase a cloud-storage link.

  • Email a scan: drop a bulky receipt or contract under the attachment ceiling in one pass.
  • Portal uploads: meet strict size caps on tax, visa, and HR submission forms.
  • Faster sharing: a lighter file uploads and downloads quicker on slow connections.

If you would rather store an archival-grade master and only compress derivatives, render the original to a lossless format with the PDF to TIFF tool first, then keep the small PDF for circulation. You can also visit the PDF to JPG Converter home for the full toolkit.

Guides about PDF Compressor

Document compression How to Reduce PDF File Size for Email and Uploads A practical guide to reducing PDF file size so heavy documents fit email and upload limits, covering what makes PDFs large and how to compress without wrecking quality. 6 min read

More PDF→JPG tools

PDF to JPG Turn every page of a PDF into a crisp, high-resolution JPG image in seconds — free, online, and with no watermark. PDF to PNG Render PDF pages to lossless PNG images with crisp text edges — ideal for diagrams, screenshots and line art. JPG to PDF Combine one or many images into a single, tidy PDF document — perfect for receipts, scans and portfolios. PDF to TIFF Export PDF pages to high-DPI TIFF images for archiving, faxing, OCR pipelines and print workflows.

Frequently asked questions

Why did my text-only PDF barely shrink?
This compressor works by re-rendering page images at a lighter resolution, so it saves the most on scan-heavy and image-heavy PDFs. A document that is mostly selectable text has very little image data to optimise, so the size stays roughly the same.
Will the compressed text still be readable?
Yes. The 110 DPI target keeps body text comfortably legible on screen while removing the surplus resolution that makes scans so heavy. For fine print you intend to enlarge heavily, keep a higher-quality copy as well.
Does compression change the page count or layout?
No. Each page is re-rendered in place, so the page count, order, and layout stay exactly as they were. Only the per-page image resolution and quality are reduced.
How much smaller can I expect the file to be?
Scan-based PDFs typically drop by 50 to 80 percent. The exact figure depends on how high the original scan resolution was, since the savings come from trimming resolution you cannot perceive on a screen.