Free PDF Compressor
Reduce a PDF's file size by recompressing its embedded images, directly in your browser.
Add a PDF to compress
Choose a PDF file.
Maximum 100 MBRecompresses embedded JPEG images to reduce file size. PDFs without recompressible images may not shrink.
Processed in your browser. Your PDF never leaves your device.
How to compress a PDF
- Choose a PDF file.
- Adjust the image quality if you like.
- Select Compress PDF.
- Download the smaller file.
How this works
This tool finds the JPEG images embedded in your PDF, recompresses each one at your chosen quality level directly in your browser, and rebuilds the PDF with the smaller images in place — all without extracting or re-uploading anything.
A note on scope
This reduces size by recompressing embedded JPEG images, the dominant source of large file size in scanned or photo-heavy PDFs. PDFs that are mostly text and vector graphics are usually already small and may not shrink further, and images in less common formats or color spaces are left untouched rather than risking a color-corrupting re-encode.
Common use cases
- Shrink a scanned document before emailing it
- Reduce a photo-heavy PDF's size for upload limits
- Make a large PDF report smaller to share
Frequently asked questions
Is this PDF compressor free?
Yes. It is completely free, with no signup and no limits.
Is my PDF uploaded anywhere?
No. It is compressed entirely in your browser. Nothing is sent to Inqita or stored.
Why didn't my PDF get smaller?
If your PDF is mostly text and vector graphics, or doesn't contain recompressible JPEG images, there may be little or nothing to shrink — this tool will tell you honestly rather than claim a reduction that didn't happen.
Will image quality be noticeably lower?
At the default setting, quality loss is usually minor. Lower the quality slider further for smaller files at the cost of more visible compression artifacts.
Does this work on scanned documents?
Yes — scanned pages are typically stored as JPEG images, which is exactly what this tool recompresses.