Compress PDF Online — Reduce File Size
Shrink a PDF to fit email limits and upload portals. Runs in your browser; the file never leaves your device.
Most large PDFs are large because of the images inside them, not the text. This tool re-renders each page at a lower resolution and re-encodes it as a compressed image. That cuts scans dramatically, but text on compressed pages becomes part of the image and is no longer selectable. Keep your original if you need searchable text.
How to use it
- Choose a PDF or drop it into the box
- Pick a compression level
- Compare the before and after size, then download
Frequently asked questions
Will my text still be selectable?
No. Compressed pages are saved as images, so text cannot be selected or searched afterwards. Keep the original if you need that.
How much smaller will it get?
Scanned, image-heavy files often shrink by 50–80%. A text-only PDF may barely change, and the tool will tell you if the result is larger.
Is my file uploaded?
No. Compression happens inside your browser tab.