๐๏ธ PDF Compressor
Reduce PDF file size by optimizing content โ free, in your browser.
PDF Compress: Reduce PDF file size
PDF Compress lets you reduce pdf file size. Upload a PDF and get a smaller PDF โ all processed locally in your browser, with no uploads and no sign-up.
Shrink PDFs for email attachments
Shrink PDFs for email attachments. This is one of the most common reasons people reach for PDF Compress โ and it handles the job in seconds, entirely in your browser.
Compress scanned documents
Compress scanned documents. This is one of the most common reasons people reach for PDF Compress โ and it handles the job in seconds, entirely in your browser.
Reduce PDF size for web upload
Reduce PDF size for web upload. This is one of the most common reasons people reach for PDF Compress โ and it handles the job in seconds, entirely in your browser.
Everything You Need in a PDF Compress
Powerful features that make PDF Compress fast, private, and free.
Instant Processing
PDFs are processed in your browser the moment you upload.
100% Private
Your PDFs never leave your device โ no server uploads.
Text-Based Output
Conversions produce real, searchable, selectable text.
All-in-One PDF Suite
Merge, split, edit, annotate, convert โ 25+ PDF tools.
Free Forever
No sign-up, no watermarks, no page limits.
Cross-Platform
Works on Windows, Mac, Linux, iOS, and Android.
How to Use
Upload the PDF
Add the file you want to shrink. Emails, uploads, and storage quotas are the usual reasons to compress.
Review the current size
The tool shows the file's size so you can judge how much you need to save. Image-heavy PDFs compress the most.
Run the compression
The tool re-encodes embedded images and strips redundant objects in your browser. Lower image quality produces the biggest savings.
Download and compare
Save the compressed file, open it to check quality, and confirm the page count matches. Keep the original until you are satisfied.
Detailed User Guide
Two levers: image quality and metadata
Compression here re-encodes embedded images and strips redundant objects. Reducing image quality produces the biggest savings; the exact amount depends on how image-heavy the original is.
Text-heavy PDFs shrink less
A document that is mostly text and vectors will compress far less than one full of scanned photos. Do not expect a 90% reduction on a text-only contract โ the file is already efficient.
Quality is a trade-off you control
Lower quality settings save more space but can make text in scanned pages look soft. For archival documents, keep quality high; for email attachments, a moderate setting is a good balance.
Local processing protects sensitive files
Compression runs in your browser with pdf-lib, so tax returns, medical records, and contracts never touch a server. This is the main reason to prefer it over an upload-based compressor.
Check the output before replacing the original
Always open the compressed file and confirm pages, fonts, and images look correct. Keep the original until you are satisfied โ compression is lossy for embedded images.
Recommended Tools for Document Work
Gear that pairs perfectly with your PDF workflow.
Canon SELPHY CP1500
Wireless compact photo printer โ print 4x6 photos from your phone.
SanDisk Extreme SSD 1TB
Rugged portable SSD โ fast backup for photos, videos, and large files.
Matte Inkjet Art Paper
Matte heavy-weight paper for art prints & graphic works.
Glossy Photo Paper
High-quality photo paper for printing your edited pictures.
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