Compress PDF Size Online
Reduce your PDF file size directly in your browser. Drop a file, hit compress, and download the result. Nothing leaves your device.
Drop a PDF here or click to browse
One file at a time
How does browser-side PDF compression work?
The tool reloads your PDF and re-saves it using Flate (DEFLATE) compression applied to all indirect objects inside the file. Many PDFs exported from design tools, email clients, or older software include uncompressed or poorly packed object streams. This pass removes that overhead without touching the actual content.
How much will the file size be reduced?
It depends on the source PDF. Files exported from Notion, Google Docs, older Word versions, or email attachments often contain large amounts of uncompressed metadata and can shrink noticeably. PDFs already optimized by print workflows or modern exporters may see little or no reduction. The before and after sizes are shown so you always know exactly what you got.
Does compression affect text, fonts, or images?
No. This tool only repacks the PDF structure using lossless compression. Text remains fully selectable and searchable, fonts are unchanged, and images are not re-encoded or downsampled. The output is byte-for-byte equivalent in content to the original.
Is my PDF uploaded anywhere?
No. Everything happens inside your browser using JavaScript. Your file never leaves your device and is never sent to any server. This makes it safe to use with confidential, legal, financial, or personal documents.
Does it work with password-protected PDFs?
No. The tool cannot process PDFs that are locked with a user password. Remove the password protection first using the original software or the PDF owner password, then run the compressor.
Is there a file size limit?
There is no enforced limit. Because everything runs locally in your browser, practical limits depend on your device memory. Files up to several hundred MB should work on most modern computers. Very large files may take a moment to process.