Question 1

What happens to transparency when converting PNG to JPG?

Accepted Answer

Transparency is filled with white, because the JPEG format does not support an alpha channel. If you need to preserve transparency, convert to PNG or WebP. The tool automatically warns you when this situation occurs.

Question 2

Does converting an image online reduce quality?

Accepted Answer

It depends on the path. PNG to PNG has no quality loss (lossless). PNG to JPEG or WebP loses color data because those formats are lossy. JPEG to JPEG results in double compression and degrades the image each cycle. To preserve maximum quality when converting, use the original image, not an already-compressed version.

Question 3

What is the difference between JPG, PNG and WebP?

Accepted Answer

JPG is ideal for photographs with smooth gradients — it compresses well but loses data irreversibly. PNG is lossless and supports transparency — ideal for logos, icons and text screenshots. WebP is a modern Google format that offers better compression than JPG while supporting transparency like PNG — but not all legacy software reads WebP.

Question 4

Can I convert multiple images at once?

Accepted Answer

Yes. You can add multiple files at the same time. Each file is processed individually in the browser, sequentially or in parallel depending on device capacity. Download can be done file by file or in batch.

Question 5

Why use WebP instead of JPEG for websites?

Accepted Answer

Because WebP produces files 25–35% smaller than JPEG at equivalent visual quality. This speeds up page loading, improves Core Web Vitals and reduces bandwidth costs. All modern browsers support WebP. If you still need to support IE11 or legacy software, JPEG is more compatible.

Question 6

Does conversion remove EXIF and image metadata?

Accepted Answer

Yes. Re-encoding through the Canvas API removes EXIF metadata including GPS, device model, camera settings and embedded thumbnail. This is an expected side effect of conversion — and also a privacy advantage, especially when sharing photos taken with a phone.

Question 7

Can I convert from JPEG to PNG without loss?

Accepted Answer

You can convert the file, but you cannot recover quality lost during the original JPEG compression. PNG will store the pixels as they are now, without additional lossy compression — but the original JPEG degradation is already embedded in the pixels. To have true PNG quality, you need to start from an original uncompressed source.

Question 8

Can the converted file be larger than the original?

Accepted Answer

Yes, especially when converting JPEG to PNG. PNG is lossless and stores more information per pixel than the already-compressed JPEG. A 500 KB JPEG photo can become 3 MB as PNG — this is expected and correct. Use PNG when transparency or pixel-perfect quality matters, not to reduce file size.

Image Converter

Image formats: when to use JPG, PNG or WebP and what you lose when converting

Three steps to convert images in batch without losing quality

Sources and references for this tool

Frequently asked questions

Image formats: when to use JPG, PNG or WebP and what you lose when converting

Three steps to convert images in batch without losing quality

Sources and references for this tool

Frequently asked questions

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