A 15MB PDF that needs to be under 1MB for an email attachment or upload form — this is one of the most common PDF problems. Here's exactly how to fix it, free, in under a minute.
Most oversized PDFs contain one of these:
Images are almost always the main culprit. Reducing image resolution is the fastest way to shrink a PDF.
| PDF Type | Original Size | After Compression | Reduction |
|---|---|---|---|
| Scanned document (300 DPI) | 8–15MB | 1–3MB | 70–85% |
| PDF with photos | 5–10MB | 1–2MB | 60–80% |
| Presentation exported to PDF | 3–6MB | 0.5–1.5MB | 50–75% |
| Text-only PDF | 500KB–1MB | 200–400KB | 30–50% |
| Already compressed PDF | 1–2MB | 800KB–1.5MB | 10–25% |
Go to simplyeditpdf.com/tools/compress — free, no account required.
Click "Select PDF file" or drag and drop the file onto the page.
Start with Medium compression — it reduces most PDFs by 50–70% with minimal visible quality loss. Use High for maximum size reduction when quality is less important.
Click Compress and download your smaller PDF. The original file is not modified.
Reduce PDF file size instantly — no signup, no watermark, no file size limits.
Compress PDF →Usually because of embedded high-resolution images or scanned pages. A single 300 DPI scanned page can be 1–3MB. Compressing reduces image resolution to something still clear on screen but much smaller in file size.
For text-only PDFs, yes — compression removes redundant data with no visible change. For image-heavy PDFs, some quality reduction occurs but is usually unnoticeable on screen at medium compression.
Upload to simplyeditpdf.com/tools/compress and apply medium or high compression. Most PDFs with images will reach below 1MB. Very large scanned documents may need high compression or splitting into sections.
No. Compression reduces image resolution and removes redundant data but the file remains fully functional. Text, links, bookmarks and form fields are all preserved.