R
Resizzer
PDF 工具 100% 浏览器本地隐私保护

免费在线 PDF 压缩工具

快速减小 PDF 文件体积，满足邮件附件与各类提交限制。诚实透明地展示压缩前后的体积变化。

Drag and drop your PDF here, or click to browse

Supports PDF files up to 100MB • 100% processed locally in browser

如何使用此工具

Three simple steps to process your files

01

Upload PDF Document

Select the PDF file you wish to compress from your desktop, laptop, tablet, or phone.

02

Choose Compression Strength

Select recommended balanced compression for everyday use, or high compression for maximum byte reduction.

03

Download Optimized PDF

Review the honest before-and-after file size report and save your streamlined PDF file.

核心功能亮点

Engineered for speed, fidelity & security

Stream & Object Deduplication

Compacts object streams and removes redundant PDF overhead for clean, compliant output.

Honest Size Reporting

Transparently shows exact byte reduction. If a PDF is already fully compressed, we inform you honestly.

Preserves Layout & Text Selection

Maintains searchability, selectable vector fonts, links, and original document geometry.

Safe for Confidential Records

Contracts, statements, and tax forms never leave your device because processing happens 100% locally.

No File Size Penalties

No artificial paywalls or limits on document sizes. Free for everyone.

Universal Compatibility

Generated PDFs are fully compliant with Adobe Acrobat, Apple Preview, and modern web browsers.

FAQ

常见问题解答

How does client-side PDF compression work?
The tool parses the PDF object graph, compresses cross-reference tables into object streams, and removes unnecessary metadata without altering document text or layouts.
Why did my PDF only shrink by a small amount?
PDFs that consist purely of plain vector text or that have already been pre-compressed by scanning software often cannot be reduced further without degrading text readability. We report this honestly rather than exaggerating results.
Is it safe to compress sensitive legal or financial PDFs?
Yes. Because our compressor runs entirely inside your web browser sandbox, no data is sent over the internet.
Can I compress password-protected PDFs?
You must remove password protection from the document before compressing it, as encrypted PDFs cannot be safely rewritten in-browser.
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