File Size Reducer
Compress PDFs and images instantly. 100% free, processed in your browser.
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Max 50 MB per file
How to Reduce File Size
- Drag and drop your files (images or PDFs) into the upload area.
- Adjust the quality slider — lower quality means smaller files.
- Click "Compress All" to process all files at once.
- Download the compressed files individually.
How PDF compression works here
Each page is re-rendered as an image, which shrinks scans and photo-heavy documents a lot. It also means the text stops being selectable or searchable, and links, bookmarks and form fields are not carried over. If you need those, compress the images before making the PDF instead.
Frequently Asked Questions
How does PDF compression work?
Each page of the PDF is re-rendered as a compressed JPEG image and reassembled into a new PDF. This dramatically reduces file size, especially for PDFs with large embedded images, scans, or graphics.
Will compression reduce quality?
At 70%+ quality, the difference is usually imperceptible. For documents with text, we recommend 70-80%. For archival quality, use 85-95%. Lower settings produce smaller files with more visible compression.
What file types are supported?
Images (JPG, PNG, WebP) and PDF documents. Each file type is automatically detected and compressed using the optimal method.
Are my files uploaded anywhere?
No. All compression happens directly in your browser. Your files never leave your device and are not uploaded to any server.
More Free Tools
Working with PDFs regularly?
This tool handles the occasional job in your browser. For editing text inside a PDF, converting to Word, redacting or signing, you need a desktop editor — Kofax Power PDF is a one-off licence rather than a subscription.
See PDF editors