Compress PDF for website upload
Many CMS uploads stop around 1–4 MB per asset. This page begins at 2 MB as a balanced default before you fine-tune.
For any other KB/MB cap, use the main PDF target size tool.
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About this use case
Smaller PDFs improve Largest Contentful Paint when visitors open them inline; tune down further if your analytics show slow mobile loads.
The PDF never leaves your device for processing, which helps with drafts that are not public yet.
How to use
- Check your site’s media upload ceiling.
- Upload the PDF from your computer.
- Set the target to match or sit slightly under the CMS limit.
- Compress, download, and upload through your site’s media panel.
FAQ
- How do I compress PDF to 5MB?
- Use the 5 MB preset page listed under Related PDF sizes.
- Why can't some PDFs reach the target size?
- Print-ready brochures exported from InDesign can be huge; raster compression helps, but you may still need a design pass to flatten oversized assets.
- Is my PDF stored?
- We do not host your upload — it stays local in the browser tab.
- How does PDF compression work?
- Pages become JPEG images inside a new PDF, which makes byte size predictable for web delivery compared with untouched vector masters.
- Should I use this for every download?
- Use high-quality originals for print vendors; use compressed PDFs for fast web downloads and preview links.
Related PDF sizes
Related PDF scenarios
Related tools
- Compress PDF to Exact Size
Upload a PDF, pick a target file size (KB or MB), and download a smaller PDF tuned toward that goal. Runs in your browser with pdf.js and pdf-lib.
- Compress image to target size (KB)
Need photos under a byte limit instead? Use the image compressor with the same target-size workflow.