Finally a truly free unlimited converter! Convert unlimited images online – 100% free, no sign-up required
Menu
CZ | EN
Date published: July 9, 2026
Last update: July 9, 2026
Author: Marek Hovorka
Category: Image Optimization
Tags: Image optimization, png compression, reduce PNG size
Learn how to reduce PNG size with practical methods that preserve clarity, transparency, and usability. This guide covers compression, resizing, color reduction, and when to convert PNG to other formats.
PNG is one of the most useful image formats on the web, but it can also become one of the heaviest. If you are trying to upload a logo, screenshot, app asset, product graphic, or transparent image and the file size feels much larger than expected, you are not alone. Many people search for how to reduce PNG size because they need faster page loads, easier sharing, smaller storage use, or a way to meet upload limits without damaging the image.
The good news is that you usually have several ways to make a PNG smaller. The best method depends on what kind of image you have and what you need to preserve. Some PNGs can be reduced with lossless compression alone. Others shrink much more when you resize them, lower the color count, crop unnecessary empty space, or convert them to a more efficient format for the job.
In this guide, you will learn how to reduce PNG size step by step, when each method works best, what tradeoffs to expect, and how to choose between keeping PNG or switching to another format. If you want a fast format change after optimizing, PixConverter also makes it easy to convert PNG to WebP or convert PNG to JPG online.
Before you shrink a PNG, it helps to understand why it became heavy in the first place. PNG uses lossless compression, which means it tries to preserve image data exactly instead of throwing details away like JPG does. That is great for sharp edges, text, logos, UI graphics, and transparency. It is less great for file size when the image contains a lot of visual complexity.
Common reasons a PNG is large include:
Once you identify which of these applies, the best optimization path becomes clearer.
If you want the short version, these are the methods that usually have the biggest impact:
Not every method fits every image. The sections below explain how to choose correctly.
One of the most common mistakes is compressing a PNG that is simply far larger than needed. If your website displays a graphic at 1200 pixels wide, there is no benefit in uploading a 5000-pixel version unless users truly need that resolution.
Resizing often produces the biggest reduction with the least risk. For example, cutting width and height in half reduces the total pixel count dramatically. Since file size is strongly tied to the amount of pixel data, that can create a major size drop.
Use the actual display size as your target. If your blog content area is 900 pixels wide, exporting a 2400-pixel PNG may be unnecessary. For retina displays, you might export at 2x the display size, but even then you should avoid oversized files with no real visual benefit.
If you are preparing image assets for another format after resizing, PixConverter can help you convert PNG to WebP for leaner web delivery.
Lossless compression is the safest optimization method because it reduces file size without intentionally degrading image quality. It works by storing image data more efficiently. This will not always produce dramatic savings, but it is often the best first step when you must keep the file as PNG and preserve exact appearance.
If a PNG was exported inefficiently, lossless compression can produce a meaningful size reduction. If it was already well optimized, gains may be smaller. Still, it is usually worth doing because there is little downside.
This is one of the most effective ways to reduce PNG size for the right image type. Many PNG files do not need millions of colors. A simple logo, line graphic, chart, icon, or screenshot may look identical with a much smaller palette.
By reducing color depth, you keep the PNG format but make the image data much lighter. This is especially powerful for flat graphics and UI elements.
If your image starts showing banding or rough gradients after color reduction, the palette was pushed too far. In that case, use a slightly higher color count or consider another format better suited for rich tone variation.
Many PNGs contain invisible bloat. A common example is a logo or cutout object placed on a large transparent canvas. Even though the extra space looks empty, it still adds dimensions and increases file size.
Trimming unused margins can make a noticeable difference, especially for product graphics, stickers, overlays, and transparent design assets. If the transparent border does not serve a layout purpose, remove it.
Sometimes the best way to reduce PNG size is not to keep PNG. This is especially true for photographic content. A photo saved as PNG can be far larger than the same image in JPG or WebP, often with no visible advantage in normal viewing.
If the image does not require transparency or perfect lossless retention, converting it may be the smartest move.
For quick online conversion, you can convert PNG to JPG for photographic images or convert PNG to WebP for smaller transparent web graphics.
| Format | Best For | Transparency | Compression Style | Typical File Size |
|---|---|---|---|---|
| PNG | Logos, screenshots, graphics, editable assets | Yes | Lossless | Usually larger |
| JPG | Photos and realistic images | No | Lossy | Usually much smaller for photos |
| WebP | Web images, graphics, photos, transparent assets | Yes | Lossy or lossless | Often smaller than PNG and JPG |
If your goal is pure size reduction for web use, WebP is often the most efficient option. If you need broad compatibility for a photo, JPG may be enough. If you need exact transparency and editing safety, PNG still makes sense.
Need a smaller web-friendly file fast? Try PixConverter to convert PNG to WebP or convert PNG to JPG in a few clicks.
Start by cropping transparent padding, then reduce colors if possible, and keep PNG if transparency matters. If the logo will be used online and your workflow supports it, WebP can also work well for smaller delivery.
Resize to actual display dimensions first. Then try lossless compression. If the screenshot contains limited colors, palette reduction can help a lot. If it is more like a photographic image, consider WebP.
This is usually the easiest case to fix. Convert the PNG to JPG or WebP. Keeping photo content in PNG often wastes storage and bandwidth.
Keep PNG when you need crisp edges and transparency. Focus on exact dimensions, removing empty space, and efficient lossless compression. Test WebP for web delivery where supported.
If you are unsure where to start, use this order:
This workflow avoids unnecessary quality loss and helps you find the biggest gains early.
This is one of the biggest causes of bloated image libraries. PNG is excellent, but it is not the best choice for every image.
Design exports are often much larger than what a site actually needs. Always export for the target use case.
Invisible space still costs bytes. Trim it unless it serves a real purpose.
WebP often reduces size substantially while preserving transparency and good visual quality. For web delivery, it can be a strong improvement over PNG.
If dimensions are oversized, compressing first may save less than resizing first. Start with pixel dimensions.
There is no universal number because it depends on the image. But here are realistic expectations:
A flat logo with too much padding might shrink a lot with simple cleanup. A well-optimized transparent asset may only improve a little. A high-resolution photo saved as PNG could become far smaller after conversion.
Optimization should serve the image, not break it. Be careful when:
Always check the result at real viewing size. A file that is smaller but visibly damaged is not an improvement.
Use PixConverter for quick follow-up conversions:
The safest methods are resizing to the correct dimensions, cropping empty space, and using lossless compression. If the image is a simple graphic, reducing the color palette can also help without causing visible changes.
PNG uses lossless compression and often stores more data than JPG. JPG is designed for photos and can remove visual information to create much smaller files. That is why photos in PNG are often far larger than in JPG.
Yes. PNG supports transparency, and both lossless compression and some alternative formats like WebP can preserve it. If transparency is essential, avoid converting to JPG because JPG does not support transparent backgrounds.
For web use, WebP is often the best next step because it can keep transparency while producing smaller files. For photos that do not need transparency, JPG is also a strong choice.
Only if the image does not need transparency and does not rely on sharp graphic edges. For photos, yes, JPG is often a practical way to reduce size. For logos, icons, and screenshots with text, PNG or WebP is usually better.
Yes. In many cases, this is the most effective optimization. Fewer pixels usually means less data to store, which leads to a smaller file.
If you want to reduce PNG size, do not rely on a single trick. The best result usually comes from matching the method to the image. Start with dimensions, remove unnecessary space, compress efficiently, simplify colors when possible, and only keep PNG when its strengths are actually needed.
That approach gives you smaller files without sacrificing what makes the image useful. It also helps you avoid the common mistake of treating every PNG the same way, even though logos, screenshots, product graphics, and photos all behave differently.
If you have optimized a PNG and still need a lighter or more compatible format, PixConverter gives you a fast way to continue the workflow online.
Use the right format, keep only the image data you actually need, and your files will be easier to upload, faster to serve, and simpler to manage.
