PDF Compress
Compress PDF files to reduce size. Choose compression level and download optimized PDFs.
Compression Level
Drop your PDF here
or click to browse — PDF files only
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About This Tool
Large PDF files are a persistent problem for email communication, document storage, and web sharing. Files bloated with embedded images, redundant fonts, and unnecessary metadata can take too long to upload, exceed email attachment limits, and frustrate recipients on slow connections. Our free online PDF compressor reduces PDF file sizes significantly while preserving document quality, making your files easier to share, store, and access without purchasing desktop software.
The compressor offers multiple compression levels so you can choose the right balance for your specific needs. The light compression mode reduces file size with minimal quality impact, ideal for documents that need to maintain sharp text and images. Medium compression achieves substantial size reduction suitable for most business documents. Strong compression maximizes file size savings, which is useful for documents where slight quality reduction in embedded images is acceptable. You can preview the results at each level before committing.
All compression happens entirely in your browser with no uploads to external servers, ensuring your documents remain completely private and secure. The tool works with any standard PDF file and handles documents containing text, images, vector graphics, forms, and annotations. Whether you need to shrink a single presentation or compress an entire archive of documents, this free tool delivers fast results on any device.
How to Use This Tool
Upload Your PDF
Drag and drop your PDF file onto the upload area or click to browse. The tool accepts any standard PDF file and displays the current file size and page count.
Choose Compression Level
Select from three compression levels: Light (minimal quality loss, moderate size reduction), Medium (balanced optimization), or Strong (maximum size reduction, slight image quality reduction).
Compress the Document
Click the compress button to process the PDF. The tool optimizes images, removes redundant data, and streamlines the internal structure of the document.
Review and Download
Compare the original and compressed file sizes. If the results meet your expectations, download the compressed PDF. If not, try a different compression level and reprocess.
Advantages & Use Cases
Multiple Compression Levels
Choose between Light, Medium, and Strong compression to find the perfect balance between file size reduction and document quality preservation.
Significant Size Reduction
Achieve up to 80% file size reduction on image-heavy PDFs, making documents easier to email, share, and store.
Complete Document Privacy
All compression happens locally in your browser. No files are uploaded to servers, ensuring sensitive documents remain completely confidential.
Preserves Document Structure
Bookmarks, hyperlinks, form fields, and annotations are retained in the compressed output, maintaining full document functionality.
Free and No Installation
Compress PDFs instantly in your browser with no software downloads, registrations, watermarks, or file size restrictions.
Supported Formats & Recommendations
The PDF compressor accepts standard PDF files (version 1.4 and above) as input and produces optimized PDF files as output. It handles PDFs containing text, raster images, vector graphics, embedded fonts, form fields, digital signatures, bookmarks, and annotations. The compression engine optimizes embedded images (JPEG and JPEG2000), removes duplicate font data, strips unnecessary metadata, and restructures internal objects for efficiency. The output PDF maintains compatibility with all standard PDF viewers and readers.