Several of these chunks provide support for storing information that may be required for proper interpretation of the image data . A brief description of the format of the Data field of each of these chunks is given below. Refer to the PNG specification on the CD-ROM for more detailed information on these chunks. The palette chunk is always found in PNG data streams that contain indexed-color image data; this is indicated when the Color field of the header chunk contains a value of 3. Truecolor PNG data streams may also contain a palette chunk that non-truecolor display programs may use as a palette to quantize the image data. There will never be more than one palette chunk per PNG data stream.

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Many JPEG files do not use optimal compression, wasting valuable bytes. Balancing quality and small file size used to be a time consuming task that only humans could do. If you’re feeling a bit frustrated because you can’t save your GIMP image as a PNG file, you’re not alone. The GIMP development team decided to restrict the basic “Save” command to GIMP’s native file format, XCF, and then relocated the saving process for all other image formats. PNG formats are lossless, meaning that compression does not affect the image quality. PNGs will look very sharp when viewed from any distance. For this reason, PNG files are most commonly used by graphic designers to make edits.

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Doesn’t have that problem, so it’s usually used for the displays with higher resolutions (e.g. retina displays) and printing. SVG or Scalable Vector Graphics is a file format that defines vector graphics using the XML markup language. The main benefit of SVG is that it allows you to enlarge images without losing quality or having any pixelation.

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The width and height values you have introduced will be considered as maximum values only. And just like making a photocopy of a photocopy of a photocopy, the more you compress the same JPEG image the worse it’s going to look. GIFs reign as the most widely used web image format would come crashing down in the mid-90s.


With all the classics that designers know and love, like the pen tool and the pathfinders feature, Justinmind makes it possible to have the truly perfect workflow. Vectors are based on a mathematical formula with two-dimensional points which are joined to each other with lines and curves to form shapes. Many web browsers can view SVG files directly in the browser. Internet Explorer 9, Google Chrome, Firefox, Safari and Opera support SVG files.

Another feasible browser-based program to turn your PNG files into PDF is Online2PDF. It is a comprehensive tool that you can use as a PDF converter, compressor, merger, and splitter. When it comes to its converting functionality, you can easily transform PDF to another format and vice versa.

For a file like the one above, modifying each vector by hand is nearly impossible. You’re far more likely to use PNGs as it’s a simpler, easier to access, and more versatile file format. Complex images such as screenshots and detailed illustrations should use PNG. PNGs are suitable for displaying detailed images, artwork, and photography — everything a vector image can’t handle. Anything with hundreds of colors and a large resolution should likely be a PNG. The other major difference is their overall file sizes.

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