Compress PDF – Reduce PDF File Size Free Online
Reduce PDF file size by compressing embedded images and streams. Free online PDF compressor — no upload required.
Click to upload or drag & drop
PDF files up to 50MB
Frequently Asked Questions
The tool renders each PDF page using PDF.js and re-encodes it as a compressed JPEG image, then rebuilds the PDF with pdf-lib. This significantly reduces file size for image-heavy PDFs.
Screen (72 DPI) produces the smallest file and is suitable for web or email. eBook (150 DPI) balances size and quality. Printer (300 DPI) preserves more detail but produces a larger file.
No. The current compression method re-renders pages as images, so text will not be selectable in the output PDF. This is a trade-off for maximum compression.
There is no enforced limit, but large PDFs with many pages may take a while to process in the browser.
No. All compression is done client-side in your browser. Your files never leave your device.
What is Compress PDF – Reduce PDF File Size Free Online?
A PDF compressor reduces the file size of PDF documents by compressing embedded images, removing redundant data, and optimizing internal streams. Large PDFs are difficult to email, upload, or share. Our PDF Compressor runs entirely in your browser using pdf-lib — your files are never uploaded to any server.
How to Use Compress PDF – Reduce PDF File Size Free Online
- 1Upload your PDF file by clicking or dragging onto the tool.
- 2Select the compression level.
- 3Click Compress.
- 4Download the compressed PDF.
Key Features
- ✓Compresses embedded images
- ✓Multiple compression levels
- ✓Runs in your browser using pdf-lib
- ✓No file size limits imposed by the tool
Benefits
- →Email large PDFs that exceed attachment limits
- →Upload PDFs to platforms with file size restrictions
- →Reduce storage space for PDF archives
Why Use Irreva for Compress PDF – Reduce PDF File Size Free Online?
Frequently Asked Questions
How much can I reduce a PDF's file size?
Results vary depending on the PDF content. PDFs with many high-resolution images can be reduced significantly. Text-only PDFs have less room for compression.
Will compression reduce PDF quality?
Image compression may slightly reduce image quality at higher compression levels. Text and vector graphics are not affected.
Is my PDF sent to a remote server for compression?
No. Unlike most online PDF compressors that upload your file to a cloud service, our tool processes everything inside your browser using pdf-lib. Your document never leaves your device.
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