Lossless Image Format – Find the Simple Guide and Optimal Choice [Solved]

Last Updated on December 11, 2022 by Peter Wood

Which compression methods should you choose, lossless or lossy? If you need high-quality photos, the lossless image format is the desired choice. It enables you to retain all file information compressed to the lossy photo format. The lossless image formats are frequently used for logos, screenshots, and charts. There are multiple lossless photo formats, including PNG, WebP, AVIF, and others. Which should you choose? Just learn more details about these file formats and choose the desired one accordingly.

Lossless Image Format

Part 1: What is Lossless Image Format, Here is the Guide

The Lossless image format is a set of image compression algorithms that do not affect image quality and preserve the optimal result in the terms of photo size. No matter how many times you save or modify a lossless image, it will always maintain the same quality. But the lossless compression does not mean the files are uncompressed. Instead, the photo formats will maintain the highest image quality possible.

PNG is one of the most frequently used lossless image formats. But there are other photo formats, including WebP, AVIF, and JPEG XL. If you are only familiar with the alpha (transparency) PNG, which is often used for masking and compositing in post-production, here you should find the differences between these lossless image formats.

Part 2: PNG, WebP, and AVIF, Which is the Optimal Lossless Image Format

Which lossless image format should you choose? If you do not have an idea about the optimal file format, here are some differences and a review of the file formats you should know.

PNG – Portable Network Graphics

PNG is a lossless file format based on DEFLATE compression algorithm. It has a special filter setting that predicts color values. It is the raster graphics file format developed in the mid-1990s. It supports lossless compression that maintains details and contrast between colors and is compatible with most web browsers. It provides better text readability than JPEG and other file formats. Moreover, PNG is a file format that is supported by all browsers. But there is a major disadvantage, the large file size of PNG will slow down your website if overused, especially high-resolution images.


WebP is a kind of image format introduced by Google that supports lossless or lossy compression. It is based on the VP8 video codec that works with alpha channel data. The lossless image format is the successor of PNG that retain all original image data. It provides a similar photo quality with up to 35% smaller size. More and more web browsers are using the file format, but not all major web browsers support WebP. Just as the information provided, the file format is used for the photos of websites. But it will become more popular after a short period.

AVIF – AV1 Image File Format

AVIF is a web image format based on the AV1 codec developed by AOM. It is an open-source and royalty-free lossless image format. Moreover, it supports full resolution 8-bit, 10-bit, and 12-bit color, high bit depth, and HDR. Just like WebP, it is more efficient in compression and supports lossless compression. Besides, you can also have the AVIF files with image sequences/animation. It is another file format for a web browser with better detail preservation, fewer blocking artifacts, and less color bleeding around hard edges in composites of natural images, texts, and graphics.


JPEG XL is another new and upcoming image format. It has the edge over WebP, which deals with complex images that are hard to compress. Different from the JPEG files, the lossless image format provides lossless image compression, progressive decoding, full support for wide gamut and HDR, perceptually optimizing reference encoder, and more. It is designed to meet the needs of image delivery on the web and professional photography. It supports a wide color gamut as well as high dynamic range as well as high bit depth images.

Part 3: How to Convert Lossy Images to Lossless Images

Is it possible to convert lossy images to lossless ones? No. But there is an alternative to upscale the image resolution to make the file printable. When you need to make a large image without losing the original quality, WidsMob ImageConvert is the desired photo converter to convert between different lossless image formats. Moreover, you can also use the AI super-resolution to enlarge the photos with better quality.

1. Convert PNG to WebP or AVIF with transparency, and vice versa easily.

2. Provide an AI super-resolution to enhance the photo quality up to 4 times.

3. Support multiple photos, JPEG, PNG, WebP, AVIF, GIF, and most formats.

4. Edit photos with multiple features, like rotate, resize, add watermark, etc.

Win Download Mac Download

Step 1: Download and install WidsMob ImageConvert, click the Import button to upload the photos into the program. Of course, you can drag and drop the desired files for a batch process. It supports most lossless photo formats, like PNG, WebP, AVIF, and more.

Preview and Edit AVIFs Win

Step 2: It enables you to rotate and flip the photos, resize the lossless photos in 4 different methods, add text and image watermarks with multiple settings, and rename the output files in a batch process. After that, you can click the Batch Convert button to continue.

Upscale Resolution PNG ImageConvert

Step 3: When you need to print some JPEG files or enlarge some lossy file formats without losing quality. You can also click the AI Super Resolution icon and check the 4X option to enhance the resolution of the lossy images up to 4X the original one.

Edit AVIF Photos ImageConvert

Step 4: If you need to convert one lossless image format to another, you can choose the PNG, WebP, or AVIF file format from Format. Moreover, there are parameters to tweak the quality and duration for converting the file formats. After that, you can click the Convert button.

Tweak Converting Settings AVIF PNG Win Download Mac Download


When you need to learn more about lossless image formats besides PNG, here is a simple guide you should know. Whether you need to learn more about the photo compression method, find the different features of the file formats, or convert between different lossless image formats, you can find the answers in the article.