PDF Compressor — Reduce PDF File Size Online Free
Compress PDF files in your browser without uploading. Keep text crisp, links working, and quality intact while shrinking the file size — free, private, no sign-up.
Drop your PDF here, or click to browse
文件在浏览器中处理 —— 不会上传任何内容。
What is a PDF compressor?
这是什么
A PDF compressor reduces the size of a PDF document so it is easier to store, share, and attach to emails. filecompressor.app re-saves your PDF using object streams and strips duplicate fonts and redundant data, all inside your browser.
Because the compression happens on your device, sensitive documents like contracts, invoices, and IDs never leave your computer. There are no upload limits and no account required — just drop a PDF in and download a smaller one.
How to compress a PDF
使用方法
Compressing a PDF is fast and private. Here is how:
- 1
Drag your PDF into the dropzone above or click to browse and select the file you want to shrink.
- 2
The tool re-encodes the PDF in your browser, removing redundant streams and re-saving with efficient object streams. You will see the new size and percentage saved.
- 3
Click Download to save the compressed PDF. Text, links, and bookmarks stay intact throughout the process.
Why use this PDF compressor?
为什么使用
Fully private — your PDF is processed in the browser and never uploaded to a server.
Free with no sign-up, no watermarks, and no daily limits on how many PDFs you compress.
Preserves text, links, bookmarks, and selectable content so the document works exactly as before.
Great for email — shrink PDFs to fit under the 25MB attachment limit.
Works on desktop and mobile browsers with no software to install.
FAQ
关于此压缩工具的常见问题。
常见问题
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