PDF Compress
Optimize a PDF to reduce size (client-side).
Drop files here
Drag & drop a file here, or click to browse.
How this works
This tool performs a lossless “optimize/re-save” of your PDF (no server upload). Results vary: scanned/image-heavy PDFs often shrink, while some PDFs may stay the same or even grow slightly after rewriting.
Compress a PDF (without uploading)
ToolsOfWeb’s PDF Compress tool helps you reduce PDF file size by re-saving the document in an optimized structure. Everything runs locally in your browser (privacy-first), so your PDF isn’t uploaded to a server for processing. This is useful when you need to email a PDF, upload it to a portal with strict size limits, or speed up downloads for readers on mobile.
Keep in mind that PDF compression is not one-size-fits-all. Scanned PDFs and PDFs with large embedded images often shrink the most. Some PDFs (especially already-optimized ones) may not change, and a few can increase slightly depending on how the original file was produced. We show you the before/after size so you can decide which version to keep.
How to compress a PDF
- Upload your PDF.
- Click “Compress & Download”.
- Compare file size and keep the version you prefer.
FAQs
Are my PDFs uploaded to a server?+
No. Compression/optimization runs locally in your browser and files are not uploaded for processing.
Will compression always reduce the file size?+
Not always. Results vary by PDF structure. Image-heavy PDFs often shrink; some PDFs may stay the same or increase slightly after optimization.
Can I compress password-protected PDFs?+
If a PDF requires a password, it may fail to load. Remove the password first, then try again.
Related Tools
Want guides and tips? Visit the ToolsOfWeb blog or go back to the homepage.