Image

JPG vs PNG vs WebP: Which Image Format to Use

Dev Nexus5 min read

A clear comparison of JPG, PNG, and WebP - which to use for photos, graphics, and transparency, and when WebP beats them both.

JPG, PNG, WebP - three formats, and picking the wrong one can double your file size or ruin your image. Save a logo as JPG and the edges get fuzzy; save a photo as PNG and it balloons to several megabytes; ignore WebP and you leave easy savings on the table.

The choice is not really about preference - each format is built for a different kind of image. Once you know what each one does well, the right pick is usually obvious. This guide breaks down all three by the type of image you have, so you always land on the smallest file that still looks right.

The Problem

Most people pick an image format out of habit - whatever the camera, screenshot tool, or export dialog defaulted to. That works until it does not. A photographer saves everything as PNG and wonders why the website crawls. A designer exports a logo as JPG and sees gray fuzz where the transparent background should be. Someone else avoids WebP because they are not sure it will open everywhere.

The result is images that are too big, look wrong, or both. And because the differences are technical - lossy versus lossless, transparency support, browser compatibility - it is hard to know which trade-off you are actually making.

What you need is a simple rule for each situation: this kind of image, this format, this reason.

The Solution

Here is the short version. JPG uses lossy compression and is built for photographs - rich, continuous-tone images with no sharp edges or transparency. It gives small files for photos but cannot store a transparent background and gets blocky on text and hard lines.

PNG is lossless and built for graphics: logos, icons, screenshots of text, and anything needing a transparent background. Edges stay razor-sharp, but photos saved as PNG are far larger than they need to be.

WebP is the modern all-rounder. It supports both lossy and lossless modes and transparency, and at the same visual quality it typically produces smaller files than either JPG or PNG - often undefined-undefined% smaller. It is supported in every current browser, which makes it the default choice for the web today. The main time to skip it is when a tool or platform you must use does not accept WebP.

Whatever you choose, you can convert between formats freely with the Convert Image tool and shrink the result with Compress Image - both entirely in your browser, so nothing is uploaded.

Step-by-Step Guide

1
Is it a photograph? Use JPG or WebP
Photos have smooth tonal variation and no need for transparency, which is exactly what lossy compression handles best. JPG is the safe, universal choice; WebP (lossy) does the same job in a smaller file. Pick WebP for the web and JPG when you need maximum compatibility.
2
Does it need transparency or sharp edges? Use PNG or WebP
Logos, icons, UI elements, and screenshots of text need crisp edges and often a transparent background. PNG handles both losslessly. WebP (lossless) does too, usually in a smaller file - so prefer WebP for the web and fall back to PNG where compatibility matters.
3
Publishing to the web? Reach for WebP first
For a website, WebP is almost always the best default: smaller files mean faster pages and better rankings, and it covers both photos and graphics with transparency. Convert your JPGs and PNGs to WebP with the Convert Image tool before you upload.
4
Compress after you have chosen the format
Format sets the ceiling; compression fine-tunes the size. Once the format is right, run the image through Compress Image and set a quality level that stays visually clean. Format plus compression together give you the smallest good-looking file.

Common Mistakes

Saving photos as PNG
PNG is lossless, so a photograph saved as PNG can be several times larger than the same image as JPG or WebP, with no visible benefit. Reserve PNG for graphics, and use JPG or WebP for anything photographic.
Saving logos and text as JPG
JPG's lossy compression smears sharp edges and cannot store transparency, so logos come out fuzzy on a solid rectangle. Use PNG or WebP for graphics, icons, and screenshots of text.
Avoiding WebP over compatibility fears
WebP is supported in every current browser and by most modern software. Unless you are targeting a specific tool that rejects it, skipping WebP just means larger files for no real gain.
Converting back and forth between lossy formats
Each lossy save discards more detail. Converting a JPG to WebP and back, or re-exporting repeatedly, stacks artifacts. Convert once from the highest-quality source you have and keep that original.

Frequently Asked Questions

Is WebP better than JPG and PNG?

For the web, usually yes. WebP supports both lossy and lossless modes plus transparency, and at the same quality it produces smaller files than JPG or PNG. The main reason to skip it is a tool or platform that does not accept WebP.

When should I use PNG instead of JPG?

Use PNG for graphics with sharp edges, flat colors, or transparency - logos, icons, and screenshots of text. Use JPG for photographs, where its lossy compression gives much smaller files.

Does WebP support transparency?

Yes. WebP supports an alpha channel in both its lossy and lossless modes, so it can replace PNG for transparent graphics while producing smaller files.

Which format is smallest?

At the same visual quality, WebP is typically the smallest - often 25-35% smaller than JPG or PNG. Actual savings depend on the image, but WebP wins in most cases for both photos and graphics.

How do I convert between these formats?

Use the Convert Image tool to change a file between JPG, PNG, and WebP, then Compress Image to shrink it. Both run entirely in your browser, so your images are never uploaded.