|Internet media type||image/png|
Portable Network Graphics format (also known as PNG format) is often applied as a substitution for JPEG due to its convenient usability.
This image extension is based on LZW compression - like GIF and TIFF for example. This allows images to take up less space, while still maintaining the quality of the file. PNG images always support brightness control and colors’ correction. Additionally, PNG has a full RGB specter, which supports a transparent background.
PNG supports 8-bit as well as 24-bit colors, which helps to combine both characteristics of GIF and JPG files. Moreover, a PNG file supports color management, because the ICC color space profiles are already included in it. It’s also good for compression, since any photographic images converted in this format save their quality. And, this format is compatible with all modern browsers.
|Developed by||PNG Development Group (donated to W3C)|
|Useful links:||Further information on PNG Files. How can I open a PNG file?|
If a PDF document is password protected, you’ll have to enter the password each time you want to view the document. Password protecting a document is necessary for many reasons. For controlling access to the information specified in the document. Say, for example, your file is on a publicly-accessible source but contains confidential data that only certain individuals should have access to. In this case, you share the password you have specified for the document with a limited number of people. Another reason could be that establishing limited access to the document means protecting it from any possible changes. If you’re sending a contract to your stakeholders, you’ll want it to be printed and signed but not altered. You can let your partner peruse the document and be sure that it remains in its original form. One more case is locking forms that are used for filling via a link. Any user may accidentally or deliberately alter a form if it’s not locked.
Although locking files is definitely considered to be very useful, what are you going to do if something changes? You want to provide access to your document’s content and coding is no longer needed. Specifying a password is now one more unnecessary step. Accessing PDFs in a secure location is inconvenient. It goes without saying, that protected files are unavailable for editing or formatting. The solution is simple: just remove the password-protection. Now you have the ability to use a powerful brand new tool to unlock PDF files.
AltoUnlockPDF gives you the ability to remove password-protection in a few clicks. Use any internet connected device to instantly upload a PDF to the server. To avoid the useless jumble of words and expressions, here is a list of the main features of this service:
To begin unlocking and editing PDF contracts, agreements, invoices, medical or tax forms, follow these steps:
If you’ve unlocked PDF file for editing, open your PDF editor and click anywhere on the document to start adding text. Change the font, size and color of your text to your preference.