ToolPDFsCompress PDF
Reduce PDF file size in your browser by rebuilding pages with adjustable image quality.
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Drop a file here to get started.
Drop a PDF here to rasterize and reduce its file size.
This tool compresses by converting each page into optimized JPG images and rebuilding the PDF.
Output
Your result will appear here.
How it works
Sending a large PDF by email, attaching it to a web form, or storing it on a shared drive is much easier when the file size is under control. A compressed PDF delivers the same content at a fraction of the storage cost. ToolPDFs Compress PDF tool reduces PDF size entirely inside your browser using canvas rendering and the pdf-lib library. Your file is never sent to a server, so sensitive contracts, signed agreements, medical reports, and private documents stay completely on your device from start to finish.
The tool works by converting each page of your PDF onto an HTML canvas and rebuilding the document at a quality level you choose. A lower quality setting shrinks the file more aggressively, while a higher setting keeps the appearance closer to the original. For most everyday documents such as office reports, scanned forms, and presentation slides, the default quality produces a clean and readable result at a noticeably smaller size.
Compress PDF is free to use with no account, no signup, and no file count limit per session. Processing speed depends on your device hardware rather than a remote queue, so most PDFs compress in a few seconds on any modern laptop or phone.
Features
- Runs entirely in your browser. Your file is never uploaded to any server.
- Adjustable quality setting so you control the balance between file size and visual clarity.
- Works on any device including iPhone, iPad, Android, and all major desktop browsers.
- No account required and no usage cap per session.
- Instant one click download of the compressed PDF.
Frequently asked questions
Is it safe to compress a confidential PDF here?
Yes. The tool runs entirely in JavaScript inside your browser tab. Your PDF never leaves your device, so no one at ToolPDFs or elsewhere can access your file.
How much smaller will my PDF become?
Results vary by content. PDFs with many high resolution images can shrink by 50 to 80 percent. Documents with little or no images may see more modest reductions.
Will compression affect text readability?
Text remains readable at most quality settings. The compression affects rasterized image quality since each page is converted to a canvas image. Use a higher quality setting if your PDF contains very small print or fine line art.
Can I compress multiple PDFs at once?
The tool handles one PDF per session. Upload, compress, and download each file separately.
Does this work on iPhone?
Yes. Compress PDF works in Safari, Chrome, and Firefox on iPhone and iPad.