1. How to make a relatively large pdf file smaller
1. The file in the picture below is composed of four photos. As you can see, the file size exceeds 20 megabytes. .
2. Click "View" → "Tools" → "Document Processing" to open the toolbar on the right. The second method of launching the Tools Toolbar is simpler. Click the "Tools" button in the upper right corner; this button also hides the right toolbar.
3. Click "Optimize Scanned PDF" and a dialog box will pop up as shown above. The sliding module is in the red box, the left is to reduce the size of the file, but in order to reduce the clarity of the document, the right is to high quality, high definition, but the file will be larger. In order to highlight the effect, I chose the smallest document. Click OK. As you can see, the compressed file is less than 300K! Only 1% of the original file!
4. The second method is relatively simple, but the compression effect is not so powerful and not smart enough. "File" → "Save As" → "Shrink PDF", then enter the new file name "OK". As you can see, this method does not make any changes to the original file, it is a new file.
5. The size of the new file is the system default and cannot be adjusted manually. The new file is 1.6 megabytes in size, which is approximately 7% of the original file size. Both types of files have their own pros and cons, please choose according to your needs.
2. Help
Reducing the size of Adobe PDF files will improve their display, especially on the Internet *** without changing their appearance.
Sometimes you can reduce the size of an Adobe PDF file simply by using the Save As command. This action resaves the file but does not require access to the source file used to generate the Adobe PDF file.
If you receive a larger PDF document, you can use the Reduce File Size command to resample and recompress images, unembed fonts, compress document structure, and organize elements such as repeating backgrounds images and invalid bookmarks to try to reduce file size. If the file size is already small enough, this command will not work.
NOTE: Reducing the number reduces the file size of a digitally signed document without destroying the validity of the signature, which will invalidate the signature. You can also reduce file size by limiting compatibility with older versions of Adobe Acrobat.
This method is recommended if you can ensure that all users are using Acrobat 7.0.
To reduce file size: 1. Choose File > Reduce File Size.
2. Please select the compatible version you require and click OK.
Note: If you select "Acrobat 4.0 and later" and the document contains transparency, the transparency will be flattened.
PDF documents downloaded from some databases are often very large in size, such as prola, an article about EAM downloaded from APS. aps.
org/abstract/PRB/v29/i12/p6443_1 Since the file contains images instead of text content, it only has 11 pages and a size of 2. 46M.
Storage and transmission are inconvenient. Here are some ways to reduce the size.
I am using acrobat3D v8 here. 1. First open the pdf, select Document-OCR Text Recoginition-Recognize Text Using OCR in the main menu. In the dialog box, select All pages, Primary OCR Language: English, PDF Output Style: Searchable Image, Downsample: Lowest (600dpi), and then OK acrobat performs OCR recognition on the document content and turns it into a searchable text form. At this time, you can save it first and see that the file has changed to 1.
79MB, indicating that in addition to its own functions, OCR recognition also has the effect of reducing file size. Then Document-Reduce File Size, because 7 is generally used.
0 and above readers, so choose 7. 0 and above.
Take a look at the new file after saving. It has been reduced to 368KB. If you choose 8.
0 and above do not make the file smaller. If compressed into rar, it can be reduced to 336KB, but it is of little significance. From 2.
The reduction from 46MB to 336KB has obvious results, without any loss in display quality, and the text has also become a searchable and copyable form. The order is critical. If you Reduce File Size first and then OCR, the result will be 2.
46MB->940KB->832KB acrobat also has a function, Document-Optimize Scanned PDF, which can also reduce the size, but for this kind of PDF files with very clean and clear text, it has little effect and uses Display quality deteriorates. The document PDFs in the literature database are basically in neat format, with clear and standardized text. They can be OCRed. I have an article by Slater in 1931, which was multi-processed from 4MB to 700KB.
It’s just that its Chinese OCR recognition effect is not good, not as good as Purple Light, although Purple Light is not that good either. As for Optimize Scanned PDF, the processed size depends on the slider to focus on quality or file size. It can also eliminate low noise and correct fonts. It is basically meaningless for documents in this type of database.
For this kind of database document, if you zoom it to the maximum size, you can probably reduce the size by about 15%, but the text effect will also be poor, so it is not worth it. The document PDFs in the literature database are basically in neat format, with clear and standardized text. They can be OCRed. I have an article by Slater in 1931, which was multi-processed from 4MB to 700KB.
It’s just that its Chinese OCR recognition effect is not good, not as good as Purple Light, although Purple Light is not that good either. As for Optimize Scanned.
Discussion: How to reduce PDF file size? The size of some output PDF files exceeds our requirements. At this time, we need to compress it. I tried several methods: 1. Starting from Adobe Acrobat 7, the "PDF Optimizer" ("Advanced" tab ), we can use it to compress PDF files. 2. Use PDF Enhancer to compress and adjust.
3. Print your PDF file using a PDF virtual printer. Generally, the PDF size can be compressed to 30%-70%, depending on the composition of your PDF file. PDF virtual printer, I tried the Bullzip PDF Printer and PDF Factory that come with Adobe Acrobat Professional Edition.
I feel it is best to use Bullzip PDF Printer at this time. Sometimes using the above method, a file of about 200M can be compressed up to 70M. Please comment if it helps.
3. How to make PDF files smaller? Compress 30M to 20M.
Install Acrobat 9 Pro (Acrobat X Pro), each with two compression methods.
If it is Acrobat 9 Pro, open the PDF file:
1. Menu "Document/Reduce File Size", click OK after execution, save as, the file will be reduced to the smallest size, but If there are pictures, the picture quality will become very poor.
2. Menu "Advanced/PDF Optimizer", after execution, you can set the compression content yourself, such as image resolution, quality, text embedded in the document, compression of transparent areas and other various settings, to Compress PDF documents according to your requirements.
If it is Acrobat X Pro, these two commands are also the same, but the positions are changed, "Reduce File Size" and "Optimized PDF" in the menu "File/Save As".
Of course, if you use Adobe's design software to generate PDF, you can already compress the PDF document during generation.
If the file cannot be reduced through the above methods, it means that the compression of your document has reached the limit. Please merge some content in the PDF and then compress it
4. How to make the PDF file smaller
The cracked version of PDF Compressor is a software specially used to compress scanned PDF documents. Using the cracked version of PDF Compressor can effectively compress the size of PDF documents, which is beneficial to document storage and transmission.
(2) PDF files are a special type of electronic files. There are also exclusive editing tools for editing PDF files. Developers of PDF compression have also developed exclusive compression tools for PDF files based on the performance of PDF files. .
Open a specific tool when compressing. There is a PDF file compression here. Come to this and click on this function.
The tool guides us to add pdf files to the tool page, click Select File to add the pdf folder, and select the files we need to compress into the operation box.
The tool will calculate the file size and present the accurate data; we just click the compression button on the page.
5. What are the simple ways to make PDF files smaller
Method 1: Use a PDF converter and the virtual printer pdf factory. As long as other format files can be printed, Selecting this virtual printer can create PDF files, which is very simple and practical; Method 2: Find an online PDF conversion tool.
There are many websites that can compress PDF files. You only need to upload the file, and then download it again after the compression is completed. The compressed file size generally does not exceed 5-10MB, of course there are exceptions.
Common online PDF conversion tools include: SmallPDF – This website can quickly compress PDF files and provide downloads, and there is no limit on file size or number of conversions. PDFpress by Neevia – This site can only convert files under 5MB, but has more compression options than SmallPDF.
;Method 3: Use the "Reduce PDF Size" function: 1. Open Adobe Acrobat. Open the PDF file you want to compress, but this function is not available in the free version; 2. Use the "Save As" function.
Open the "File" menu, hover the mouse over "Save As", a submenu will expand, and then select "Reduced PDF Size". You can also select the "Reduce PDF Size" feature from the Document menu.
3. Select compatibility. If you choose a newer version, the file will be smaller, but it may not be open on older versions of Acrobat.
4. Save multiple files. If you want to apply the same settings to multiple files, click "Apply to multiple documents" to add multiple documents.
In the Output Options dialog box, refine the folder and file name settings. Method 4: Use PDF Optimizer: 1. Open the PDF file to be reduced in size.
The PDF optimizer has more detailed settings for reducing file size. For most users, using the default settings is enough to reduce files to their optimal size.
The optimizer compresses files by removing embedded and duplicate fonts, compressing images, and removing other unnecessary objects. 2. Open PDF Optimizer.
From the File menu, choose Save As, then Optimized PDF. PDF Optimizer can also be turned on in the Advanced menu.
3. Statistics of PDF size. Click the "Statistic Space Usage" button to view the size of each part of the PDF file, and you will be able to know whether it is the image or the embedded font that stretches the file.
The size of each element in the PDF will be presented in bytes and as a percentage of the total file size. 4. Adjust settings.
You can use the default settings as is, or fine-tune them as needed. On the left side of the window, you can click on the specific elements you want to adjust (pictures, fonts, transparency, etc.). If you do not want to adjust a certain element, you can uncheck it. When you only want to adjust the text This feature is very useful when you don’t want to adjust the font.
When optimizing images, you can change color images to grayscale, compress their size, downsample them, or reduce their quality. When optimizing fonts, if it is a font that everyone knows, then there is no need to embed it.
For example, if you are sharing a PDF file to people at school, then everyone may use the same system, so there is no need to embed fonts. 5. Press "OK".
At this time, the PDF file will be converted into a new file according to the settings. To check the size of the new file, you can click Save, or you can re-open it in PDF Optimizer, and then click the "Statistic Space Usage" button.
Method 5: Use other methods to deal with it.