No one likes large-size files for transferring, downloading or storage. PDF files are no exception. Sometimes, scanned PDF files or PDF files with lots of images are too large to send them by mail or take too much time to download on the Internet. In order to solve these troubles, some powerful software or tools are needed to reduce the size of large PDF files without quality loss.

1.Acrobat is the first choice if batch process is not needed.

Adobe Acrobat is the most important software which is widely used around the world. You can read, edit and manufacture your PDF files. Luckily, you can also compress and save your files size by its Optimize PDF function. Useful functions for you can be found in their setting dialog and what you want to control your files, it is up to you.

Open Acrobat and choose your document. Go to File -> Save As Other and you will find Reduced Size PDF followed. Choose Acrobat Version Compatibility, you will get the smaller file compared with the original one.

After Testing, up to 90% size will be saved and the file could be shared freely. Acrobat is useful if batch process is not the necessary requirement, as you have to compress and reduce your file size one by one.

2.Try PDF Compressor V3 if you focus on PDF file compression.

If you have to compress multiple PDF files and you need one-time completion to save your time instead of one by one. You need a straightforward compression tool with batch process. PDF Compressor V3 from PDFConverters is the one you can rely on. As a useful and effective application, you can customize your compression level by yourself to reduce the size of your PDF documents.

Launch this application and you can find it is designed in a user-friendly way. Drag and drop your files or folders, all PDF files will be listed with information like name, path, size, and status. After clicking "Advanced Settings", you can adjust the quality level of the embedded images. Furthermore, all images could be removed if it is necessary. Moreover, in order to reduce the file size further, it is allowed to remove annotations, bookmarks and attachment from the imported items. Not only for reducing size, but also for some safety consideration.

As a professional PDF compression tool, PDF Compressor V3 could be a choice for you when you are looking for such kind products. Write a review on your blog, twitter or facebook and email to support@pdfconverters.net, you can get a free license from the developer.

3.Some online tool will help you compress either.

If there is no need for you to take safety in consideration, you can try some web application to compress your PDF files online. Like ilovepdf.com is one of the choices. Visit its website www.ilovepdf.com/compress_pdf, a clear-cut and minimalistic UI shows and you will get to know how to use it even you have no any experience.

Drag and drop your PDF files, you get three options about the compression level. They are Extreme Compression, Recommended Compression and Less Compression, any of them will lead you to different compressed PDF files with different quality and size.

You can try it for free within only two times.

4.Use optimized images when you are editing your documents.

You have large PDF files mostly because of the large images. Before converting your office documents to PDF files, try to optimize your images first. Use JPEG instead of PNG. Compress your images first if you want to get PDF files with smaller size. Compress images is much easy and better than compress your PDF files.

You have several choices when compressing images, like Photoshop, Online tools. Then, all you need to do is editing the documents with optimized images inserted then convert it to PDF using "Save As" in Office software.

Details make a difference. Try to optimize or compress your large PDF files before sharing it to your colleagues or friends. It is time for you to show your professional capability.