Does this upload my PDF?

No. All processing happens locally in your browser using pdf-lib. Nothing is sent to any server.

Does this work on mobile?

Yes. Works in Safari on iPhone/iPad and Chrome on Android. Tap the upload area to select a PDF.

No imposed limit. The practical limit is your device memory. Most modern devices handle hundreds of megabytes.

No. Remove the password from the PDF first using your PDF reader, then use this tool.

Standard PDF 1.x and 2.0 files. Encrypted PDFs are not supported.

Yes. The tool does not re-encode page content. Text remains selectable and images retain full resolution.

在浏览器中压缩 PDF — 移除元数据、优化对象流，缩减报告、扫描件、幻灯片的文件大小。100% 在本地处理，不上传，无文件大小限制。

100% client-side · no upload

PDF file

Load a file to begin.

Choose your PDF using the file picker or drag and drop it into the upload area.
Click Compress PDF — the tool removes metadata and optimizes internal structure client-side.
Review the output size shown in the status line.
Click Download to save the compressed PDF.

Email attachments that exceed Gmail / Outlook 25 MB caps.
Document-management systems with per-upload size ceilings.
Sensitive PDFs (contracts, medical records) where uploading to a third-party server is not acceptable.
Slow-network uploads where every megabyte saved matters.

Does this upload my PDF?: No. All processing happens locally in your browser using pdf-lib. Nothing is sent to any server.
Does this work on mobile?: Yes. Works in Safari on iPhone/iPad and Chrome on Android. Tap the upload area to select a PDF.
Is there a file size limit?: No imposed limit. The practical limit is your device memory. Most modern devices handle hundreds of megabytes.
Are password-protected PDFs supported?: No. Remove the password from the PDF first using your PDF reader, then use this tool.
What PDF versions are supported?: Standard PDF 1.x and 2.0 files. Encrypted PDFs are not supported.
Is the output quality the same as the input?: Yes. The tool does not re-encode page content. Text remains selectable and images retain full resolution.

Last updated: 2026-05-20 By jarvisbox