Compress PDF Online
Shrink your PDF file size without sacrificing readability. Choose a compression level and optionally convert to grayscale for maximum reduction.
Uploading
Converting
Exporting
Choose PDF File
or drag and drop
Max file size: 100 MB
How To Compress PDF
Upload PDF
Drag & drop or click to select a PDF file from your computer, phone, or tablet.
Choose Compression Level
Open Advanced settings to pick Low, Medium (default), or High compression. Optionally enable grayscale to maximize size reduction.
Download Compressed PDF
Click Compress PDF. Processing typically takes seconds. Download your smaller PDF when it is ready.
Why Use Our PDF Compressor?
Best Quality
Preserves text, fonts, vector graphics, and document structure. Only image data within the PDF is compressed — text remains crisp and sharp.
Free & Secure
No account required. Your PDF is processed on secure servers and automatically deleted after download. We never store your documents.
Works Anywhere
Runs entirely in your browser — no desktop software, plugins, or app installs needed. Works on Windows, Mac, iOS, and Android.
Compression Levels
Low compression: minimal size reduction, maximum quality. Medium: optimal balance. High: smallest possible file, still readable and shareable.