Top 5 Image Conversion Myths Debunked

Image conversion is a task that nearly everyone performs at some point, yet it is surrounded by misconceptions that lead to suboptimal decisions. From believing that converting formats always degrades quality to thinking that PNG is always larger than JPG, these myths persist because they contain a kernel of truth that has been oversimplified or misapplied. In this article, we will identify and debunk the five most common image conversion myths, providing you with accurate information to make better decisions about your digital images.

Myth 1: Converting JPG to PNG Improves Quality

This is perhaps the most widespread misconception about image conversion. Many users believe that converting a JPG image to PNG will somehow improve its visual quality, as if the PNG format has the ability to restore detail that was lost during JPG compression. Unfortunately, this is not how image formats work.

The Reality

PNG uses lossless compression, which means it preserves all the data present in the input. However, it can only preserve what is already there. If a JPG image was compressed at 70% quality, converting it to PNG will produce a PNG file that is visually identical to the source JPG — complete with any compression artifacts that were present in the original. The PNG format cannot recover information that was discarded during JPG compression.

What PNG can prevent is additional quality loss. If you plan to edit, resize, or save an image multiple times, converting to PNG first ensures that no further degradation occurs during these operations. But the initial conversion itself does not improve quality — it merely preserves the current state of the image.

Myth 2: PNG Files Are Always Larger Than JPG Files

It is commonly assumed that PNG files are always significantly larger than their JPG equivalents. While this is generally true for photographic content, it is not a universal rule.

The Reality

The relative file sizes of PNG and JPG depend entirely on the image content. For photographs with millions of colors, complex gradients, and textures, PNG files are indeed much larger than JPG equivalents — often 5 to 10 times larger. This is because PNG's lossless compression cannot reduce the file size as aggressively as JPG's lossy compression for this type of content.

However, for images with large areas of solid color, sharp edges, and limited color palettes — such as logos, icons, diagrams, and screenshots — PNG files can actually be smaller than JPG files. PNG's DEFLATE algorithm excels at compressing repetitive patterns, which are common in these types of images. A simple logo with a few flat colors might be 2 KB as a PNG but 15 KB as a JPG at equivalent quality.

The lesson is that file size comparison between formats is content-dependent. Always test both formats with your specific images to determine which produces the better result.

Myth 3: Converting Between Formats Is Always Lossy

Many users assume that any conversion between image formats inevitably results in quality loss. This belief leads to hesitation about converting images when it would actually be beneficial to do so.

The Reality

The lossiness of a conversion depends on the source and destination formats. Converting from a lossless format (like PNG) to a lossy format (like JPG) does introduce quality loss, because the lossy compression discards data. However, converting from a lossy format (like JPG) to a lossless format (like PNG) does not introduce any additional quality loss — the resulting PNG file is a perfect copy of the source JPG's pixel data.

Similarly, converting between two lossless formats (such as PNG to TIFF) is entirely lossless. No data is lost regardless of how many times the conversion is performed. Understanding this distinction helps you make informed decisions about when conversion is safe and when it involves trade-offs.

Myth 4: You Should Always Use the Highest Quality Settings

Some users insist on using the highest possible quality settings for every image, believing that anything less is unacceptable. While this approach seems conservative, it can actually be counterproductive in many scenarios.

The Reality

Using maximum quality settings (100% for JPG, for example) produces files that are significantly larger than necessary with no perceptible visual improvement. Studies have shown that most people cannot distinguish between a JPG at 85% quality and one at 100% quality when viewed at normal sizes on standard displays.

The optimal quality setting depends on the image content, the display context, and the performance requirements. For web use, quality settings between 70 and 85 typically provide the best balance between file size and visual quality. For print, higher settings may be appropriate. For social media, where platforms will re-encode images anyway, maximum quality settings are wasteful.

The key is to match the quality settings to the specific use case rather than applying a one-size-fits-all approach. Tools like our image converter help you find the right balance by allowing you to preview the output and compare quality levels before finalizing the conversion.

Myth 5: All Image Converters Produce the Same Results

Users often treat image converters as interchangeable, assuming that any tool will produce equivalent results. This assumption can lead to unexpected quality issues, file size problems, and compatibility concerns.

The Reality

Image converters can produce significantly different results due to variations in their algorithms, default settings, and handling of edge cases. Key differences include:

• Compression efficiency: Some converters use more advanced compression algorithms that produce smaller files at equivalent quality.
• Metadata handling: Some converters preserve EXIF data, ICC profiles, and other metadata, while others strip it. This can affect color accuracy and workflow integration.
• Color space management: Poor converters may not properly handle color space conversions, leading to color shifts or inaccurate reproduction.
• Transparency handling: When converting to or from formats that support transparency, the quality of the transparency rendering varies between tools.
• Local vs server processing: Browser-based tools that process images locally offer privacy advantages over server-based tools that require uploading your files.

Choosing a high-quality converter that processes images locally and provides control over output settings ensures the best possible results for your specific needs.

Bonus Myth: Modern Formats Make JPG and PNG Obsolete

Some claim that newer formats like WebP and AVIF have made JPG and PNG obsolete. While modern formats do offer compelling advantages, this claim overstates the current reality.

The Reality

WebP and AVIF offer better compression ratios than JPG and PNG, and they deserve serious consideration for web use. However, JPG and PNG remain the most universally compatible formats, supported by every browser, operating system, and application ever made. For email attachments, print workflows, archival storage, and environments with legacy software requirements, JPG and PNG continue to be the safest choices.

The most practical approach in 2026 is to use modern formats as the primary delivery format for web content, with JPG and PNG as fallbacks for compatibility. This progressive enhancement strategy provides the best of both worlds.

Conclusion

Image conversion myths persist because they simplify complex topics into easy-to-remember rules. By understanding the reality behind these myths — that conversion loss depends on format pairs, file size depends on content, quality settings should match the use case, converter choice matters, and legacy formats remain relevant — you can make more informed decisions about your image workflows. For reliable, high-quality image conversion that processes files locally on your device, our browser-based converter provides the tools you need to convert images with confidence and precision.