Shrink your PDF, keep it shareable.
Reduce a PDF file size so it is easy to email or upload — with an optional image-downscale mode for bigger savings. Runs in your browser.
What is the Compress PDF?
BYAFT's Compress PDF tool reduces the file size of a PDF so it is easier to email, upload or store — without leaving your browser. It does a lossless re-save by default, and offers an optional image-downscale mode that rasterises pages for bigger savings. You always see the before-and-after size, and your file is never uploaded.
Reach for it when a PDF is too large for an email attachment or an upload limit, and you would rather not install desktop software.
How to use the Compress PDF
- 1Open your PDFDrop in or select the PDF you want to shrink.
- 2Pick a compression modeKeep the default lossless re-save, or switch on image downscaling for bigger savings.
- 3Download the smaller fileCheck the before-and-after size, then save the compressed PDF.
What you can use it for
- Getting a PDF under an email attachment limit
- Meeting an upload size cap on a portal
- Saving storage space on large scanned documents
- Speeding up sharing of image-heavy PDFs
Frequently asked questions
Is the PDF compressor free?
Yes. Compressing PDFs is completely free, with no sign-up and no watermark.
How much smaller will my PDF get?
It depends on the file. A lossless re-save gives modest savings; the optional image-downscale mode can shrink image-heavy PDFs much more. The tool shows the before-and-after size so you can decide.
Will compression reduce quality?
The default lossless mode keeps your content as-is. The image-downscale mode rasterises pages to save more space, which lowers image quality and turns text into an image, so it is no longer selectable.
Are my files uploaded?
No. Compression runs entirely in your browser; your PDF never leaves your device.