PDFs have a way of growing out of control. A 40-page report exports at 18MB. A scanned contract hits 25MB. Email limits bounce back your attachment. Clients complain they can't open it on mobile.
The usual advice is to use an online tool — but most of those upload your PDF to a remote server. For confidential documents, that's a non-starter. Here's how to shrink any PDF entirely inside your browser.
Why PDFs get large
Most PDF bloat comes from a few common causes:
- High-resolution images — photos embedded at full print resolution (300dpi+) when screen resolution (72–150dpi) is sufficient
- Uncompressed image data — images stored as raw bitmaps instead of compressed JPEGs
- Embedded fonts — full font files included when only a subset of characters are needed
- Scan artefacts — scanned PDFs often contain huge uncompressed TIFF-like image layers
Step-by-step: compress with EazyStudio PDF Compressor
1
Open the PDF Compressor
Go to EazyStudio's PDF Compressor. No account needed — just open it.
2
Drop in your file
Drag your PDF onto the drop zone, or click to browse. The file stays in your browser — nothing is uploaded.
3
Choose compression level
Select from Low (best quality), Medium (balanced), or High (smallest file). For most use cases, Medium works well.
4
Compress and download
Click Compress. Processing happens locally in seconds. Download the result — done.
What compression levels actually do
| Level | Image quality | Typical reduction | Best for |
|---|---|---|---|
| Low | High (150dpi) | 20–40% | Archiving, printing |
| Medium | Good (96dpi) | 40–70% | Email, sharing |
| High | Screen (72dpi) | 60–85% | Web, previews |
Good to know: Text in PDFs compresses losslessly regardless of the setting you choose. Only embedded images are affected by the quality level.
When compression alone isn't enough
If your PDF is still too large after compression, a few other tools can help:
- Use PDF Splitter to break a large document into sections, then share only the relevant pages
- Use Image Compressor to pre-compress images before including them in your PDF
- If the PDF is mostly scanned pages, consider whether the original scan resolution was unnecessarily high
Ready to compress?
Open the PDF Compressor directly — no upload, no account, works on any device.
Compress a PDF now