Compress PDF
Reduce file size by up to 80% while maintaining document quality.
No uploads, 100% private.
Local Processing • No Limits
Why Use Our PDF Compressor?
Shrink your documents for email and web uploads without sacrificing readability. Learn about our local processing technology.
100% Secure
Your documents are processed locally in your browser using WebAssembly and never touch a server. Not even temporarily — there is no upload step at all.
Smart Compression
We intelligently re-encode images at optimized resolution to drastically reduce file size. Text and vector elements are preserved at full sharpness — only raster images are downsampled.
Structure Analysis
Our engine analyzes every page, removes redundant metadata, and strips hidden data that bloats file size without contributing to the visible document content.
Free & Unlimited
Compress as many files as you need with no watermarks, no daily limits, and no registration. The tool runs on your own hardware, so there are no server costs to pass on to you.
How it Works
Four simple steps to a lighter document.
Select PDF
Upload the document you want to compress from your device or drag it into the upload zone.
Analyze
Your browser generates a live preview thumbnail so you can confirm the correct file is loaded.
Optimize
Click Compress — our engine re-encodes each page at optimal resolution, fully locally.
Download
Save your smaller PDF file directly to your device. The compressed file is ready in seconds.
Common Questions
Learn more about our security in our Privacy Policy.
Yes, completely secure. All processing runs entirely in your browser — your file never leaves your device, not even for a millisecond. There is no upload step, no server processing, and no third party ever receives your data. You can confirm this by turning off your internet after the page loads — compression still works perfectly.
It depends heavily on the file content. Image-heavy PDFs typically see reductions of 40–80%. Text-only PDFs with very few images will see smaller gains of around 10–20%. The biggest files to compress are scanned documents and presentation exports — these respond extremely well.
Yes, 100% free with no hidden costs, no watermarks, and no usage limits. You can compress as many files as you need. Because processing runs on your own device, there are no server costs involved which keeps the tool permanently free.
Our compression re-encodes the visual content of each page at an optimized resolution. Text in the compressed output may become rasterized (converted to image), which means it will look visually sharp on screen but will no longer be text-selectable or searchable. If you need to keep text selectable, use our compressed file for sharing and keep the original for editing.
More Powerful Tools
Discover our suite of secure, browser-based tools designed to make document management effortless.
JPG to PDF
Convert JPG, PNG, or WebP images into a single PDF document instantly. No file size limits, no watermarks, 100% local.
PDF to JPG
Extract high-resolution JPG images from PDF pages. Select specific pages or convert the whole document. Free and private.
Image Compress
Reduce JPG and PNG file sizes by up to 80% without visible quality loss. Batch compress hundreds of images at once.
Merge PDF
Combine multiple PDF files into one document. Drag thumbnails to reorder pages before merging. No upload required.
Split PDF
Extract specific pages or split by custom range. Click thumbnails to select pages visually or type ranges like 1-5, 8.
Word to PDF
Convert DOCX files to professional PDF documents with fonts, tables, and formatting preserved exactly as designed.
PDF to Word
Convert PDF files into editable Microsoft Word DOCX documents. Preserves paragraphs, tables, and text structure.