JPG vs PNG vs WebP: Which Image Format Should You Use?

Published July 18, 2026

Every time you save or export an image, something quietly decides how big the file is, how sharp it looks, and where it will work: the format. JPG, PNG, and WebP each make a different trade-off between file size and quality, and picking the wrong one is why logos come out blurry, why web pages load slowly, and why "simple" screenshots end up five times larger than they need to be. This guide explains what each format actually does, gives you a simple rule for choosing, and shows how to convert any image in seconds — right in your browser.

The 10-second answer

If you just want the rule of thumb, here it is: use JPG for photographs, PNG for logos, screenshots, and anything that needs a transparent background, and WebP when you're putting images on a website and want the smallest files. Everything below explains why — and covers the edge cases where the rule bends.

JPG: the everyday photo format

JPG (or JPEG — same thing, the "Joint Photographic Experts Group" that designed it in 1992) is the world's default photo format. It uses lossy compression: it throws away fine detail your eye is unlikely to notice, which is why a 20 MB photo can shrink to 2 MB and still look great. Photos are full of smooth gradients — skies, skin, shadows — and that's exactly what JPG compresses brilliantly.

Its weaknesses are the mirror image of its strengths. Hard edges — text, line art, logos — get smudged with faint "ringing" artifacts. It also has no transparency: any see-through area becomes a solid background. And because it's lossy, every re-save loses a little more quality, so avoid editing and re-exporting the same JPG over and over.

PNG: crisp graphics and transparency

PNG uses lossless compression: the pixels that come out are exactly the pixels that went in, every time. That makes it perfect for screenshots, charts, logos, pixel art, and any image containing text — edges stay razor sharp no matter how many times you save.

PNG's headline feature is full transparency. A logo saved as PNG can sit on any background — light mode, dark mode, a photo — without a white box around it. The cost is size: a detailed photograph saved as PNG is often 5–10× larger than the same photo as JPG, with no visible difference. That's the classic mistake: photos saved as PNG "to keep the quality" that just bloat a web page or blow past an email attachment limit.

WebP: the modern all-rounder

WebP, developed by Google, is the newest of the three and tries to be both things at once. It supports lossy and lossless modes, handles transparency, and even does animation. In lossy mode it typically produces files 25–35% smaller than an equivalent JPG at the same visual quality — which is why site-speed tools like PageSpeed Insights nag you to "serve images in next-gen formats."

Browser support stopped being an issue years ago: Chrome, Safari, Firefox, and Edge all display WebP. The remaining friction is outside the browser — some older desktop apps, government upload forms, and print shops still expect JPG or PNG. So WebP is the best choice for images on your website, and a slightly risky choice for images you send to other people.

Side-by-side comparison

Which one should you pick?

Photos for a website or blog

WebP. Smaller files mean faster pages, and page speed affects both your visitors' patience and your search ranking. Our Image to WebP tool converts a whole batch at once if that's all you need.

A logo or icon

PNG. You almost certainly need the transparent background, and lossless compression keeps the edges clean at any size.

Photos to email or message someone

JPG. It opens everywhere — old computers, office software, print shops — and the files are small enough to attach without a second thought.

A screenshot with text in it

PNG. JPG will visibly smear the letters. If the screenshot is going on a web page, WebP (lossless) works just as well and is smaller.

Anything for print

JPG at high quality, or PNG. Print shops handle both without question; WebP support is still hit-or-miss in print workflows.

How to convert between formats

You don't need Photoshop or an installed app for any of this. The Toolyard Image Converter handles all three formats in your browser:

1. Open the Image Converter and drop in your image — or click to browse. You can add several files at once.
2. Pick the output format: JPG, PNG, or WebP.
3. For JPG and WebP, adjust the quality slider if you want. Around 80–85% is the sweet spot where files get much smaller but quality loss stays invisible.
4. Click convert and compare the new file size — the tool shows you exactly how much you saved.
5. Download the result. Converting multiple files? They download together so you're done in one go.

One detail worth knowing: when you convert a transparent PNG to JPG, the transparent areas have to become something, since JPG can't store them. A good converter fills them with white rather than black — Toolyard's does this automatically.

Is converting images online private?

With Toolyard, yes — because your images never actually go "online." The conversion happens inside your browser using the Canvas API built into Chrome, Safari, Firefox, and Edge. Nothing is uploaded to a server, nothing is stored, and the tool even works offline once the page has loaded. That matters when you're converting family photos, ID scans, or client work.