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
- Go to altocompresspdf.com. Open it in any browser.
- Upload a document. Use the Choose File button or simply drag and drop the sample in the highlighted area.
- Choose a cloud service to upload the file from. Click on the Dropbox, Google Drive, or One Drive icon.
- Click Compress Now!. Shrink your document.
- Press the Trash button. Remove the document if it’s not the right one.
- Click the Download Now button. Save the copy to your device or to the cloud.
- Select additional options. Edit, sign, secure, save the sample to another format, or share it using one of the buttons.
The Ultimate Features Comparison Chart
With so many tools on the market, it’s 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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No software downloads | ✔ | ✔ | ❌ | ||||||||||||||||||||||||
Cloud storage | Unlimited | No info | No info | ||||||||||||||||||||||||
Price | Free | Free 7-Day Trial paid | Free 7-Day Trial paid | ||||||||||||||||||||||||
Encryption and security | ✔ | ✔ | ✔ | ||||||||||||||||||||||||
Support | 24/7/365 | No info | ✔ | ||||||||||||||||||||||||
No ads | ✔ | ✔ | ✔ | ||||||||||||||||||||||||
Customer Reviews — 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 it’s 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
That’s awesome! I can compress my PDF files from any device, even when I’m 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
There are several ways to reduce a PDF file’s size but the best one is to use an online compressor. Try AltoCompressPDF to quickly and securely make your files smaller. Just drag and drop a document into the highlighted field and click Compress Now!. It’s absolutely free and in seconds, you’ll get a new file.