blocks|key|2045161|text|便携文档文件PDF压缩机压缩PDF文件&轻松减小PDF文件大小|type|blockquote|depth|inlineStyleRanges|entityRanges|offset|length|data|2045162|有很多PDF文件需要复制，传输或交换经常在互联网上。但是，PDF文档是由图像生成的，文件大小非常大。这是不容易发送电子邮件与大PDF附件。|unstyled|2045163|PDF压缩器是一种Windows实用程序，它可以快速、轻松地压缩扫描的PDF文件，并将PDF文件大小从30+MB减少到8+MB+(压缩比:+23%25)。该工具允许用户更改压缩值，以获得更好的压缩结果和内容质量。此外，该程序支持批处理模式，并允许用户一次压缩数百个PDF文档。|2045164|PDF压缩器可以将压缩的PDF文档保存到原始PDF文件夹中，而无需覆盖原始PDF文件。但如果您愿意，它也可以输出压缩文件到指定的文件夹路径。|2045165|该程序还可以自动从受保护的PDF文件中删除限制。|entityMap|0|LINK|mutability|MUTABLE|url|https://free-pdf-compressor.en.softonic.com/^0|6|6|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|D|3|E|5|F|7|X|8|@]|9|@]|C|$]]|$1|G|3|H|5|F|7|Y|8|@]|9|@]|C|$]]|$1|I|3|J|5|F|7|Z|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|C|$]]]|M|$N|$5|O|P|Q|C|$R|S]]]]

<blockquote>
Portable Document File <a href="https://free-pdf-compressor.en.softonic.com/" rel="nofollow noreferrer">PDF Compressor</a>
It Compresses PDF Files &amp; Reduce PDF File Size Easily
</blockquote>
There are lots of PDF files need to be copied, transferred or exchanged often on the Internet. However, PDF documents are made from images and the file sizes are very large. It is not easy to send emails with large PDF attachments.
PDF Compressor is a Windows utility that compresses scanned PDF files and reduces PDF file size from 30 MB to only 8 MB (Compression Ratio: 23%) fast and easily. This tool allows users to change the compressing value to get better compressed result and content quality. Also, the program supports batch mode and lets users compress hundreds of PDF documents at one time.
PDF Compressor can save the compressed PDF documents to original PDF folder without overwriting original PDF files. But if you like, it can also output compressed files to a specified folder path.
The program can automatically remove the restriction from protected PDF files as well.

blocks|key|2045317|text|我使用PDF24+PDF创建者压缩PDF文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2045318|📷|atomic|entityMap|0|LINK|mutability|MUTABLE|url|https://alternativeto.net/software/pdf24-creator/|1|IMAGE|IMMUTABLE|imageUrl|https://i.stack.imgur.com/ulN3v.png|imageAlt^0|3|C|0|0|0|1|1^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|D|3|E|5|F|7|X|8|@]|9|@$A|Y|B|Z|1|10]]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|O|J|P|C|$Q|R|S|-4]]]]

I use <a href="https://alternativeto.net/software/pdf24-creator/" rel="nofollow noreferrer">PDF24 PDF Creator</a> for compressing PDF files.

<a href="https://i.stack.imgur.com/ulN3v.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ulN3v.png" alt="PDF24 Compress"></a>

blocks|key|2045227|text|我对鬼脚本+(在AGPL下发布)有很好的体验。安装完毕后，可以使用带有参数的命令行轻松调用.|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2045228|检查这种堆叠溢出问题以获取用法示例|entityMap|0|LINK|mutability|MUTABLE|url|https://www.ghostscript.com/|1|https://tldrlegal.com/license/gnu-affero-general-public-license-v3-(agpl-3.0%2529)%2520license|2|https://stackoverflow.com/questions/10450120/optimize-pdf-files-with-ghostscript-or-other^0|2|3|0|8|4|1|0|2|6|2^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]|$A|U|B|V|1|W]]|C|$]]|$1|D|3|E|5|6|7|X|8|@]|9|@$A|Y|B|Z|1|10]]|C|$]]]|F|$G|$5|H|I|J|C|$K|L]]|M|$5|H|I|J|C|$K|N]]|O|$5|H|I|J|C|$K|P]]]]

I had a very good experience with <a href="https://www.ghostscript.com/" rel="nofollow noreferrer">Ghostscript</a> (released under <a href="https://tldrlegal.com/license/gnu-affero-general-public-license-v3-(agpl-3.0)" rel="nofollow noreferrer">AGPL</a> license). once installed, can be easily invoked using the command-line with parameters.

check <a href="https://stackoverflow.com/questions/10450120/optimize-pdf-files-with-ghostscript-or-other">this stackoverflow</a> question for usage example

blocks|key|208284|text|由于您没有指定OS，Mac查看器预览版有一个缩小大小的选项。使用导出命令，然后选择“缩小大小”选项。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|entityMap^0^^$0|@$1|2|3|4|5|6|7|C|8|@]|9|@]|A|$]]]|B|$]]

Since you did not specify OS, the Mac PDF viewer Preview has an option to reduce size. Use the export command and then choose 'reduce size' option.

blocks|key|208306|text|如果您正在寻找好的PDF优化软件，我建议您检查ORPALIS减速器免费版。该软件可以将PDF文件减少80%25。PDF减速机采用基于数据类型的最有效的压缩方案。文件可打印，可缩放，质量不受损失。它很容易使用，并且可以在线程中工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|208307|我建议的第二个选择是由哈维尔·古铁雷斯创建的FileOptimizer。该程序是一个开放源码的GUI和自由软件，可以优化文件，如图形，文件，pdf文件等。这在一个解决方案是我必须拥有的。|entityMap|0|LINK|mutability|MUTABLE|url|https://kubadownload.com/orpalis-pdf-reducer-free-edition-download.1611.html|1|https://kubadownload.com/fileoptimizer-download.1360.html^0|9|7|0|0|M|D|1^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@$A|P|B|Q|1|R]]|C|$]]|$1|D|3|E|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]]|C|$]]]|F|$G|$5|H|I|J|C|$K|L]]|M|$5|H|I|J|C|$K|N]]]]

If you are looking for good <a href="https://kubadownload.com/orpalis-pdf-reducer-free-edition-download.1611.html" rel="nofollow noreferrer">PDF optimization software</a> I would recommend to check ORPALIS PDF Reducer Free Edition. The software can reduce PDF files up to 80%. PDF Reducer applies the most effective compression scheme based on data type. Documents are printable and zoomable without loss of quality. It's easy to use and can work in threads. 

The second option I would advise is <a href="https://kubadownload.com/fileoptimizer-download.1360.html" rel="nofollow noreferrer">FileOptimizer</a> created by Javier Gutiérrez. The program is a GUI for opensource and free software that can optimize files like graphics, documents, pdf files etc. This all in one solution is my must have.

The other similar question is not related to my question and didn't provide answers at all.

So I'm looking for a freeware or opensource software that can compress my 1GB+ PDF files into a reasonable size, without quality loss or very little quality loss...

Software to compress PDF files

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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另一个类似的问题与我的问题无关，根本没有给出答案。因此，我正在寻找一个免费的软件或开源软件，可以压缩我的1GB+ PDF文件到一个合理的大小，没有质量损失或很少的质量损失.

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