Then, how to compress a PDF file if it is too large? Please don't worry. Let's share two simple methods and have a look.
1, professional method compression
Run "
SmallPDFer
"Software, and add the PDF files that need to be compressed to the software in batches. Then, set the menu such as saving directory, and click "Start Compression" in the lower right corner after confirmation. Wait a moment, that is, when the progress bar 100%, you can view the specific compressed file.
Method 1
2, simple method compression
First of all, you can choose the screenshot function that comes with the operating system to intercept the important content of the required PDF file. Then, paste it into the drawing tool and save it as needed.
Method 2
How to compress a PDF file Four methods to compress a PDF file directory Method 1: Use an online compression tool to compress a PDF file 1, and find an online PDF compression tool. 2. Select the file to be compressed from your computer, or drag and drop the file to start uploading. 3. Wait. Method 2: Use the saving function of AdobeAcrobat to compress the PDF file 1 and open the PDF in AdobeAcrobat. 2. Click File → Save As → Reduce the size of the PDF. Method 3: compress the PDF file 1 under MacOS, and double-click to open the PDF preview in the Finder menu. 2. Click File → Export. 3. Click the Shi Ying filter option and select "Reduce file size". 4. Click "Save". Method 4: Use AdobeAcrobat's PDF optimizer to compress the PDF file 1, and select the PDF optimizer in the advanced menu of AdobeAcrobat. 2. Determine which items have increased the file size. 3. Select the Picture Settings panel to adjust the images in the file. 4. Click the Font Settings panel to embed or un-embed fonts. 5. Adjust the transparency of the pictures contained in the document through the transparency setting panel. 6. Select Discard Object Panel to delete unnecessary items from the file. 7. Click Discard User Panel to delete personal information from the document. 8. Select the Cleanup Settings panel to delete redundant and useless data from the document. 9. After changing the settings, click OK. Portable file format (PDF) file is an open and standard way to transmit files electronically. Support almost all platforms-Windows, MAC OS, Linux-to transfer documents, graphics, charts and tables, and the effect looks like printing. Sometimes, when transferring files, it is necessary to compress the files in order to send them as attachments to e-mails or upload them to websites. There are many ways to compress PDF files, and the guide in this article will tell you some of them.
Method 1: Use the online compression tool to compress the PDF file.
1. Find an online PDF compression tool. Enter the search keyword "free online PDF compression tool" in the browser to find it. Ensure that the service is free and comes from a large well-known computer company, commercial printed matter or online publication (there are often clearly visible banner advertisements on the website, indicating that the website obtains resources from reputable sources).
2. Select the file to be compressed from your computer, or drag and drop the file to start uploading. The website may ask you to enter a graphic verification code or watch an advertisement.
3. Wait. After the compression is completed, you will be reminded that the download is available. Some services will send you an email containing compressed files, while others will allow you to download them directly from the website.
Method 2: Use the saving function of AdobeAcrobat to compress the PDF file.
1. Open the PDF in AdobeAcrobat. You can also select multiple PDF files.
2. Click File → Save As → Reduce the size of the PDF. Select the version required for compatibility. If you can ensure that all users use AdobeAcrobatX or later, the file will be further compressed.
Method 3: compress PDF files under MacOS.
1. Double-click to open the PDF preview in the Finder menu. By default, PDF files will open in preview unless you have AdobeReader or a third-party PDF reader installed. If so, just find the PDF of, right-click it, click Open with, and then select Preview.
2. Click File → Export. A dialog box will appear.
3. Click the Shi Ying filter option and select "Reduce file size".
4. Click "Save". If you don't rename this file, a dialog box will pop up asking if you want to replace the original file. Selecting Replace will overwrite the current document.
Method 4: use AdobeAcrobat's PDF optimizer to compress PDF files.
1. Select the PDF optimizer from the advanced menu of AdobeAcrobat. The PDF Optimization window will appear with some file compression options.
2. Determine which items have increased the file size. Click the Audit Space Usage button in the upper right corner of the window. Here, you will see the different components of the file (font, color, etc.). ), the number of bytes used by each component, and the percentage of space occupied. Decide which components can be reshaped by clicking the corresponding panel on the left side of the screen.
3. Select the Picture Settings panel to adjust the images in the file. Here, you can adjust and set color, grayscale and black-and-white image compression. The higher the pixel per inch (ppi), the better the image resolution. If you don't print, consider reducing ppi (this will make your file smaller). To ensure the viewing effect on the screen, only 72ppi is needed.
Reducing pixel sampling reduces the number of pixels and image resolution by merging the colors of the original pixels into larger pixels. Select an option from the drop-down menu. Average sampling can use average pixels for the sampling area and apply colors to the whole area. "Sub-sampling" is to select a pixel in the central area of the sample and apply the color to the whole area. Bicubic Reduced Pixel Sampling uses a weighted average algorithm to determine the color of pixels, which will produce a smoother color scale.
4. Click the Font Settings panel to embed or un-embed fonts. Fonts embedded in the original document to ensure that if you open the PDF document on another computer that does not contain the original fonts, you can also view and print the document. If you don't need to use some fonts in the PDF, you can choose not to embed fonts, which will make the file smaller. Fonts will be automatically replaced with fonts that were not included in the original font system. In this panel, there are two columns ("Embedded Font" and "Font Embedding") that allow you to select as needed.
5. Adjust the transparency of the pictures contained in the document through the transparency setting panel. The drop-down options include Low Resolution, Medium Resolution and High Resolution, and each option includes Influence Transparency, Gradient and Grid. Adjusting the transparency preset here will reduce the file size accordingly.
6. Select Discard Object Panel to delete unnecessary items from the file. When you open this panel, you will see a list of discarded object settings and a list. Settings here include "Discard all submitted forms", "Discard document labels" and "Discard bookmarks". Click to select and discard objects that do not apply to the original document.
7. Click Discard User Panel to delete personal information from the document. Similar to the Discard Objects panel, this panel lists information about users. Choose from options such as discarding all comments, forms and multimedia, and discarding personal data in other applications. Personal information may be hidden. To find it, use the command to check the document (File → Check Document).
8. Select the Cleanup Settings panel to delete redundant and useless data from the document. Make sure that the object compression option for compressing the document structure is selected from the drop-down menu. By default, only functional elements that do not affect the PDF are selected. Selecting non-default settings may seriously affect the function of the document, so it is recommended that you do not change these settings unless you are sure of the consequences.
9. After changing the settings, click OK. A window will appear, prompting "Save Optimization Result as" to select a file name and format, and save it to the location where you want to save it.
It is suggested that using only one font in the whole file will help to reduce the file capacity, because fonts will also occupy a certain amount of information when stored in the file.
Transparency flattening cannot be undone after the file is saved.
Pdf compression to the specified size The detailed operation steps of compressing pdf to the specified size are as follows:
Tools/materials: Lenovo Xiao Xin Pro 16, Windows 10, WPS11.0.
1. Find compression in the start menu of the PDF document interface, and click Open.
2. Select Custom from the compression menu.
3. Set the compression quality and custom pixels in this interface, and then click OK.
4. In this way, you can choose the size of the PDF you want to compress. Click Start Compression and wait for the compression to complete.