Compress PDFs online fast and free
Characteristics
File extension | |
Internet media type | application/pdf |
Description: | PDF is the Portable Document Format developed by Adobe Systems. It was invented to streamline the process of sharing and viewing files independent of any software, OS or hardware. Individuals can use PDFs wherever and whenever they want on any device. PDF files can contain textual and visual data as well as links, buttons and more. PDFs can be also password protected and edited with special programs. |
Technical Details: | Graphics are represented in PDF very similarly to that of PostScript. PDF graphics use a device-independent Cartesian coordinate system which describes the surface of a page. The page description uses a matrix to scale, rotate, or skew graphical elements. The graphics state is a collection of graphical parameters that may be changed, saved, and restored by a page description. |
Developed by | ISO |
Initial Release: | 15 June 1993 |
Useful links: | https://acrobat.adobe.com/us/en/acrobat/about-adobe-pdf.html https://fileinfo.com/extension/pdf |
How-to guide
How to compress a PDF online for free
The How to Guide
How to Reduce the Size of the File and Preserve the Quality
- Get to altocompress.com by typing it in your search bar or the web address bar in your browser.
- Use one of the following ways to import the necessary document to the converter: drag and drop it, upload it from your gadget or upload it from one of the pre-approved cloud solutions.
- In case you uploaded the wrong file, click on the bucket icon to delete it.
- Hit the Compress Now! button.
- Wait a few seconds for the file to be resized.
- Save the compressed file using the Download Now button.
- Repeat the compression using the Start over again function.
- In order to go to PDFfiller’s editor and redact and share your document, click Work on your PDF.
The Ultimate Features Comparison Chart
With so many tools on the market, itβs hard to choose the right one. Most of them seem similar until you look deeper. Use our comparison table to compare the market leaders in PDF management. Find out why choosing AltoPDF is a smart decision not only for reducing file size but for many other actions as well.
Smallpdf | Adobe | ||||||||||||||||||||||||||
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View & edit
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Convert from PDF | |||||||||||||||||||||||||||
Convert to PDF | |||||||||||||||||||||||||||
Mac PDF converter | |||||||||||||||||||||||||||
Sign & secure | |||||||||||||||||||||||||||
Multi-platform | |||||||||||||||||||||||||||
No software downloads | β | β | β | ||||||||||||||||||||||||
Cloud storage | Unlimited | No info | No info | ||||||||||||||||||||||||
Price | Free | Free 7-Day Trial paid | Free 7-Day Trial paid | ||||||||||||||||||||||||
Encryption and security | β | β | β | ||||||||||||||||||||||||
Support | 24/7/365 | No info | β | ||||||||||||||||||||||||
No ads | β | β | β | ||||||||||||||||||||||||
Customer Reviews β Trusted by great people
02/28/2020
Excellent solution! If the size of your PDF document is too big, reduce it with just a few clicks. It solves the memory shortage problem. Plus itβs so quick!
01/24/2020
What I like best about the AltoPDF tool is that no registration is required. Creating an account is one of those things that makes me wanna leave the website.
01/17/2020
Thatβs awesome! I can compress my PDF files from any device, even when Iβm in a taxi or on a buss, or walking on the street. It take up memory cause no installations are needed.
How To Compress a PDF File
FAQ
How to resize PDF on mac
Use altopdf.com to downsize files on mac or any other platform, as itβs browser-based and is optimized for use across other platforms too. First, make sure that you are online and then load your doc. Then click on the orange icon to downsize and save it. You can also choose to download it, share or forward to GoogleDrive.