Reduce PDF Size
Make a PDF smaller without changing how it looks: lossless optimization keeps text, links and images intact. Free, instant, and your file never leaves you.
- No upload — 100% private
- Instant, on your device
- Free, no sign-up
- Works offline once loaded
How it works
How to use Reduce PDF Size
Drop your PDF into the box.
Keep “Recommended” selected for a lossless optimization.
Click Compress PDF and see how much was saved.
Need it smaller still? Switch to Target size and enter a limit in KB.
Why use it
Why use our Reduce PDF Size tool
Nothing visible changes
Text stays selectable and searchable, links keep working and images keep their quality.
Removes hidden waste
Metadata, embedded thumbnails and uncompressed data are cleaned out and the file is rewritten compactly.
Never makes it bigger
If your PDF is already optimal, we say so instead of handing back a larger file.
Stronger option one click away
Target size mode can shrink scans dramatically when lossless isn't enough.
Private by design
Optimization runs in your browser; nothing is uploaded or stored.
FAQ
Frequently asked questions
How much smaller will my PDF get?
It depends on how the file was made. PDFs from some scanners and office apps carry a lot of metadata or uncompressed data and can shrink noticeably; already-optimized files may barely change.
Does lossless optimization reduce quality at all?
No. Page content, fonts and images are copied as they are. Only invisible extras such as document metadata and embedded thumbnails are removed.
What metadata is removed?
Document properties such as title, author and creating software, XMP metadata and page thumbnails. Removing them is also good for privacy before you share a file.
Why is the saving small for my file?
Most of a PDF's size is usually images that are already compressed. To shrink those you need lossy compression — use Target size mode, ideally for scans and photos.
Related tools
Compress PDF to 1MB
Make large scans and reports small enough to send.
Merge PDF
Combine PDFs into one file, in any order you like.
Organize PDF
Reorder, delete, duplicate and insert pages visually.
Compress Image
Shrink JPG, PNG and WebP files without visible quality loss.
Split PDF
Extract page ranges or split a PDF into separate files.
JPG to PDF
Turn photos and scans into one tidy PDF.
Rotate PDF
Fix sideways or upside-down pages and save a new PDF.
PDF to JPG
Save every PDF page as a sharp JPG or PNG image.