Guide · 2 min read
How to Use Compress PDF
The oMyPDF Compress PDF tool reduces a PDF's file size without losing quality — ideal for shrinking a PDF for email and the web. Files under a combined 15 MB are compressed right inside your browser, so nothing leaves your device.
Quick overview
The full workflow: add a PDF, choose a compression level and quality, then download the smaller file.
Step-by-step
- 1
Open the tool
Go to the Compress PDF page. Click Select a PDF file, or drag a PDF straight onto the upload area.
- 2
Add your PDF & pick a level
Once your file is added you'll see its size and page count, plus four compression levels — Less, Recommended, High, and Extreme. Recommended is selected by default and gives the best balance for most PDFs.
- 3
Fine-tune the quality
Drag the Quality slider toward “Smaller file” or “Better quality” to taste, open Advanced options if you need finer control, then click Compress PDF.
- 4
Download the smaller file
The Result panel shows the size reduction — original vs. compressed, with the percentage saved. Click Download compressed PDF to save it.
Tips
- Pick the right level: Less keeps the best quality, Recommended suits most files, High is great for email and web, and Extreme re-renders pages as images (text becomes non-selectable).
- Mostly-text or already-optimized PDFs shrink little — the biggest savings come from image-heavy files like scans and photos.
- Stays private: files under a combined 15 MB are compressed entirely in your browser; larger files use encrypted server processing and are deleted right after.
- Free and watermark-free: compress as many PDFs as you like, no sign-up required.
Ready to shrink your PDF?
Free, private, and no sign-up required.