PDF Compressor

Compress PDF files: clean redundant data, re-encode images, before/after comparison

PDF Compressor is a free online Files & Docs tool. Compress PDF files: clean redundant data, re-encode images, before/after comparison Related terms: pdf · 压缩 · compress · 减小体积 · optimize · 瘦身. Use it on this page without signing in.

点击或拖拽上传 PDF（支持批量）

文件在浏览器本地处理，不会上传

压缩原理：重新打包 PDF，合并冗余对象与重复数据并压缩对象流。由 Word/WPS 反复编辑、含大量重复资源的 PDF 效果明显；已经过高度优化的文件体积变化有限。

Help

使用说明

  1. 上传 PDF 文件（可多选批量）
  2. 点击「压缩」自动重新打包，清理冗余数据与重复资源
  3. 显示压缩前后大小对比
  4. 下载压缩后的 PDF

常见问题

  • 文件会上传吗？ 不会，压缩全程浏览器本地完成
  • 能压多少？ 反复编辑、含大量重复资源的 PDF 效果明显；已高度优化的文件体积变化有限
  • 会损失画质吗？ 本工具无损，仅清理冗余结构，不重编码图片

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Split PDF and extract specific pages

PDF to Image

Convert each PDF page to PNG / JPG

Image to PDF

Combine multiple images into one PDF

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Compute MD5 / SHA256 checksums of files

Subtitle Converter

Convert between SRT / ASS / VTT subtitle formats

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CSV Table Tool

Parse and view CSV: sort, filter, search, stats, export to TSV / JSON

FAQ about PDF Compressor

What can PDF Compressor do?

PDF Compressor is a Files & Docs tool. Compress PDF files: clean redundant data, re-encode images, before/after comparison You can finish the job on this page.

Who should use PDF Compressor?

Anyone handling pdf · 压缩 · compress · 减小体积 · optimize · 瘦身 who does not want to install desktop software can use PDF Compressor in the browser.

Is PDF Compressor safe? Is my data uploaded?

This tool runs in your browser. We do not collect the content you enter into PDF Compressor just because you used it.

What similar tools exist?

Related tools in the same Files & Docs group are listed at the bottom of this page.