Is PNG lossless?
Yes. PNG - which stands for Portable Network Graphic - is a lossless image file type that allows you to restore the original file after compression.
The compression algorithm gives you highly detailed graphics without losing any essential data, making them a great file type for prominent photos, company logos and other valuable web images.
PNGs also support a wide variety of colours, which - when combined with lossless png compression - can provide real benefits for the world of colour photography.
How to use lossless image compression on your photos.
There are a number of different ways to use lossless compression to your advantage:
- CMS. Some CMS platforms automatically compress your images to improve web performance. They will often give you the option to adjust the compression rate too.
- Free tools. There are various image optimisation tools available online to help shrink your file sizes and make your websites run faster. They let you customise the compression rate and select what file type you want to convert to.
- Plugins. These can help to compress your images automatically, using the smallest version for your website. They support various file types and offer a range of advanced features and compression levels.
For best results, professional photo editing software like Adobe Photoshop lets you compress your images to the exact specs you need. Easily customise the compression rate and go over final touches until you’re satisfied. The Adobe Creative Cloud offers a range of resources and supports various image file types to help you shape your photographs.
Top tips for making lossless images.
Lossless compression can be a great tool for optimising high-quality digital assets. Here are a few suggestions to consider:
- Find the right file format. Make sure to find the right file type to suit your needs. Versatile TIFF files support a range of colour suitable for print, versus PNG is better reserved for web applications.
- Get creative. Edit your images as much as you like: lossless compression will preserve the quality once you export from Adobe Creative Cloud.
- Check the size. Lossless algorithms are great for retaining a high level of detail, but you may want to play around with compression levels to make them suitable for transferring via email. TIFF files are often too large, even after compression.
- Utilise presets. Adobe Creative Cloud lets you set up export presets to automatically apply your preferred the export settings. Simply customise and name your preset for speedy exports next time around.
Edit, optimise and compress your digital images all in one place with Adobe.
Lossless compression: FAQs.
What is the best lossless compression algorithm?
The best lossless compression algorithm may not be the same in every case. One of the most popular is Run-Length Encoding (RLE), which encodes data into smaller bytes by identifying repeated information. This complex approach allows compression to reconstruct the data, so it appears exactly the way it did beforehand.
Should I use lossless compression?
That depends on what you need. Lossless compression is often an effective option for reducing the size of an image file while preserving as much quality as possible. However, if you need to free up lots of storage space, it won’t typically reduce file sizes by as much as lossy compression.
Is JPEG compression lossless?
JPEG is not a lossless file format. When you compress a JPEG image, you can shrink their size significantly, however, the trade-off is that you may risk pixelation and lose definition in quality. To preserve high-quality images, PNG files are a good alternative.
Learn more about JPEG files today.
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