Compress PDF
Reduce file size and see exactly how much you saved.
or drop it here
Works best on PDFs with photos or scanned pages
Your files are processed in this browser tab and never uploaded.
How it works
How to compress a PDF
To compress a PDF, open it above, choose a level, and press Compress. You see the size before and after, and download the smaller file only if the saving is worth it.
Most of the size in a large PDF is usually photos or scanned pages. This tool finds those images and re-encodes them at a sensible size and quality. Text, fonts and vector drawings are left exactly as they are.
- 01
Open your PDF
Choose the file. Its current size and page count are shown.
- 02
Choose a level
“Recommended” suits most documents. “Smallest file” shrinks images further. “Lossless” only repacks the file and never touches image quality.
- 03
Compress and compare
Press Compress to see the new size and the percentage saved. Download it, or try another level.
Features
What it does well
Real numbers
You see the exact size before and after, and how many images were recompressed, before you download anything.
Text stays text
Only images are re-encoded. Text remains selectable and searchable, and stays sharp at any zoom.
Sensible image sizes
Oversized photos are scaled down to a size that still prints and reads well, then saved as efficient JPEGs.
Honest results
If a file cannot be made meaningfully smaller, the tool says so instead of giving you a file that is barely different.
Good to know
- PDFs made mostly of text or vector drawings are usually already compact and shrink very little.
- “Smallest file” can make images look softer; check the result before deleting your original.
- Some unusual image types (such as CMYK photos) are left untouched to avoid colour changes.
Privacy
Compression runs entirely in this browser tab, including decoding and re-encoding every image. The PDF never leaves your device.
Questions