Convert Image to PNG Without Losing Quality: A Guide

To convert an image to PNG without losing quality, open it in a converter that saves as 24-bit or 32-bit PNG, and don't change the pixel dimensions or reduce the colors. PNG is a lossless format, so what goes in is what comes out. You can do it for free with Pictulab's image converter, which runs in your browser and never uploads your files to a server.

One important caveat: converting to PNG preserves the quality your image already has, but it can't restore quality that was lost earlier. Below we cover how to do it right, when it's worth it, and which mistakes to avoid.

What "without losing quality" actually means with PNG

PNG uses lossless compression. It shrinks the file by reorganizing the data, not by throwing image information away. That's why you can open and save a PNG a hundred times and it stays exactly the same.

JPG works differently. It uses lossy compression, so every save discards fine detail your eye barely notices. If your original is a JPG, that detail is already gone. When you convert it to PNG:

• Yes, you stop losing more quality in future edits.
• Yes, you get a stable file to keep working on.
• No, compression artifacts (those blocks or halos around edges) don't disappear.
• No, you don't gain sharpness or resolution.

Bottom line: conversion is faithful to what's there. It doesn't improve it.

How to convert an image to PNG, step by step

With Pictulab's online converter

1. Go to /herramientas/convertir.
2. Drag and drop your image, or pick it from your computer or phone.
3. Choose PNG as the output format.
4. Download the result.

The conversion happens right in your browser. Your images are never uploaded to a server, which is handy if you're working with unreleased product photos or client files. It's free and you don't need an account.

With your computer's built-in tools

If you'd rather not use a website, your computer already has you covered:

• Windows (Paint): open the image, then go to File > Save as > PNG picture.
• Mac (Preview): open the image, choose File > Export, and pick PNG from the Format dropdown.

These options have real advantages: they're already installed and they work offline. Preview also lets you select several images at once and export them together. For a one-off job, they're perfectly fine.

With photo editing software

Photoshop, GIMP, and Affinity Photo give you more control when exporting: bit depth, ICC profile, interlacing, and metadata. They make sense if they're already part of your workflow.

Mistakes that do cost you quality

PNG itself doesn't lose information, but the conversion process can if you're not careful.

Saving as PNG-8

PNG-8 limits the image to a 256-color palette. That can work for flat logos, but on a product photo you'll see banding in gradients and blotchy areas. For photos, always use PNG-24 (or PNG-32 if you need transparency).

Resizing without realizing it

Some tools resize by default or cap the maximum width. Check that the pixel dimensions of the final file match the original.

Dropping the color profile

If your image uses a profile other than sRGB (Adobe RGB, for example) and the converter strips it, colors can look washed out. For online stores, the safest bet is to work in sRGB from the start, since that's what most browsers and screens expect.

Converting back and forth between formats

Going from JPG to PNG, back to JPG, and then to PNG again adds loss every time you save as JPG. If you're going to edit, convert to PNG once at the start and always work from that file.

Transparency doesn't appear on its own

This is one of the most common questions: "I converted my JPG to PNG and the background is still white." That's expected. PNG supports transparency, but it doesn't create it. If the original image had a background, the PNG will too.

To get a cut-out product on a transparent background, you need to remove the background first. You can do that with the free background remover, which also runs in your browser without uploading your images, and download a transparent PNG straight away.

When should you use PNG, and when not?

PNG isn't always the right choice. It depends on what you're using the image for.

PNG works well for:

• Logos, icons, and graphics with text or crisp edges.
• Cut-out products on transparent backgrounds for banners or product pages.
• Working files you'll edit multiple times.
• Screenshots with small text that needs to stay readable.

PNG isn't ideal for:

• Large photos published as-is on your site: the file can be several times heavier than a similar-looking JPG or WebP, which slows down page loads.
• Image-heavy galleries viewed on mobile.

A practical workflow for an online store: keep the PNG as your master file and export an optimized version for publishing. If file size is an issue, run it through the image compressor before uploading.

PNG vs. JPG file size

There's no fixed number, because it depends on the content. As a rule of thumb:

• For photos with lots of subtle tones, a PNG is usually much larger than a JPG.
• For flat graphics with few colors, a PNG can actually be smaller and look cleaner.

If your file balloons in size after converting, that's not a bug. It's the trade-off for keeping every bit of information.

If you also want to improve the image

As we've seen, converting doesn't improve quality. If your product photo needs more than that, like swapping the background for a styled scene, creating variations for social media, or turning the image into a short video, Pictulab has AI tools built for online stores. Every generation shows its token cost before you run it, so you always know what you're spending.

Start free — 100 bonus tokens, no card required.

You might also like:

• [ENLACE: how to remove the background from a product photo]
• [ENLACE: JPG vs. PNG vs. WebP for online stores]

FAQ

Do you lose quality converting JPG to PNG?

No. Converting to PNG doesn't discard any information, so the image looks exactly like the source JPG. What it won't do is bring back detail the JPG lost when it was saved.

Why is my PNG so much bigger than the original JPG?

Because PNG compresses losslessly and keeps all the image data. With photos, that usually means larger files. For the web, you can compress it or use a lighter format.

Does converting to PNG remove the background?

No. PNG supports transparency, but it doesn't generate it. To get a transparent background, you first need to remove it with a tool like the background remover.

Is it safe to use an online converter with private photos?

It depends on how the tool works. Pictulab's converter processes the image in your browser and doesn't upload it to any server, so the file never leaves your device.

Which is better for product photos, PNG or JPG?

For working files and cut-out products with transparency, PNG. For the final published image with a background, a well-optimized JPG or WebP usually loads faster with very similar visual quality.