Convert image files with our easy-to-use and free tool. Our tool lets you upload a QOI (Quite OK Image Format) file and, from this, create a new image saved in the PNG (Portable Network Graphics) format that you can then download and edit within image file editors or use for high-definition printing applications. Our conversion tool can also batch convert multiple QOI image files; up to 25 files at a time can be converted.
Along with converting QOI image files to PNG, our tool allows you to also adjust the image with some simple effects, such as applying a grayscale filter to the image. These additional options are available within the Options tab. Along with grayscale, you can also mirror or flip the image if needed. For single QOI file uploads, you will also see options to resize and rotate your image.
This option can be used to rotate the image in 90° increments.
When selected, this option will flip the image vertically.
When selected, this option will mirror the image horizontally.
When checked, this will apply a grayscale filter to the image, turning any color image into a grayscale image.
When checked, this will apply a negative filter to the image, inverting all the colors within the image.
| Extension | QOI |
| Full Name | Quite OK Image Format |
| Type | Image |
| Mime Type | image/qoi |
| Format | Binary |
| Tools | QOI Converters, Create Cookie Cutter, QOI Viewer |
The QOI file format is a modern image format capable of storing full color (32-bit) images in a compact format, with file sizes of QOI files similar to those of a PNG file.
QOI files are designed first and foremost with encoding and decoding speed in mind. It is many times faster to encode or decode an image into the QOI format than other formats, such as PNG.
| Extension | PNG |
| Full Name | Portable Network Graphics |
| Type | Image |
| Mime Type | image/png |
| Format | Binary |
| Tools | PNG Converters, Create Cookie Cutter, PNG Viewer |
| Open With | Paint.NET, Photoshop |
The PNG graphics file format is a commonly used format for storing 2D images, which can be highly compressed by the use of a palette if the image has a sufficiently low number of colors (256 colors in general). The PNG file is then further compressed using the DEFLATE compression algorithm to ensure small file sizes that are fast to download.
PNG files are seen as the logical successor to the GIF image file format and was devised in the mid-1990s as a superior format to GIF. PNG files are generally used for company logos, icons, and other non-photographic image content. Saving a digital photo in the PNG format will create a much larger file than an equivalent JPG image, hence the PNG format being unsuitable for most digital photo content.
First click the "Upload..." button, select your QOI file to upload. Select any configuration options. When the QOI to PNG conversion has completed, you can download your PNG file straight away.
We aim to process all QOI to PNG conversions as quickly as possible, this usually takes around 5 seconds but can be more for larger more complex files so please be patient.
We aim to create the most accurate conversions with our tools. Our tools are under constant development with new features and improvements being added every week.
Yes, of course! We do not store the QOI file you submit to us. The resulting PNG file, once created is deleted 15 minutes after upload and the download link will expire after this time.
Yes! Our QOI to PNG tool will run on any system with a modern web browser. No specialist software is needed to run any of our conversion tools.
Yes. Although you can use an Ad Blocker, if you like our QOI conversion tool please consider white-listing our site. When an Ad Blocker is enabled there are some conversion limits on some of our tools and processing/conversion times will be longer.
Yes. When you have converted your QOI to PNG, there is a "Feedback" option that you can use to let us know of any issues you encountered when converting your file.
Yes! Our QOI tool supports full batch conversions. You can upload up to 25 and QOI files at a time. Our tool will convert them all as quickly as possible. Once completed, you can either download the PNG files individually or download them all in a single ZIP file.
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