How do I compress PDFs for ecommerce?
Compress a PDF for ecommerce by uploading it to a browser-based compressor that reduces file size by optimising images and removing redundant data inside the PDF. CrossKit PDF Compressor does this locally. Use it for supplier invoices you need to email, compliance certificates for marketplace submissions, and product manuals that must stay under platform upload limits.
A 15 MB scanned invoice will bounce from most email servers. Compress first, send second.
Steps
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Upload the PDF
Drag and drop your invoice, manual or certificate into the tool.
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Pick compression strength
Medium is enough for most documents. Use high only when the file is huge and image quality is not critical.
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Preview and download
Check that text is still readable, then download the smaller file.
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Name the file for the recipient
“invoice_may2026_compressed.pdf” tells the recipient what to expect.
Example
A seller needs to email a 22 MB scanned factory audit report to a platform compliance team. After medium compression, the file is 3.2 MB and every page is still legible. The email goes through and the audit passes.
Common mistakes
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Compressing a PDF that is already compressed
Re-compressing adds artifacts without much size gain.
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Using maximum compression on a text-only PDF
Text-only PDFs are already small. Aggressive compression can make fonts look broken.
Recommended tool
PDF Compressor
CrossKit PDF Compressor is a free browser tool that shrinks PDFs for email and platform uploads. Use with PDF Merge when you need to combine files first.
Frequently Asked Questions
Does CrossKit keep my PDF?
No. Compression runs locally in your browser. No file is uploaded to a server.
What is the max file size?
Browser tools work best with files under 100 MB. Larger files may be slow.