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JPG vs PNG vs WebP: Which Image Format Should You Use?
Choosing between JPG, PNG and WebP sounds technical, but it comes down to three simple questions: is it a photo, does it need a transparent background, and where will it be used? This guide gives a plain answer for each format, a quick way to decide, and the mistakes that make images bigger or blurrier than they need to be.
The quick answer
- Photos: JPG, or WebP for websites.
- Logos, icons and graphics with sharp edges or transparency: PNG or WebP. For simple logos, SVG is often better still.
- Screenshots with text: PNG, or high-quality WebP.
- Websites where you want the smallest files: WebP, with JPG as a fallback for older software.
JPG (JPEG): the default for photos
JPG, also written JPEG, was designed for photographs. It uses lossy compression: it discards detail the eye is least likely to notice, which allows very small files. You control the trade-off with a quality setting. Around 75–85% is a sensible range for most photos, and below roughly 60% blocky patches, called artifacts, start to appear around edges and in smooth gradients.
JPG cannot store transparency, so a transparent background becomes a solid colour, usually white. It also suffers from generation loss: each time you open, edit and re-save a JPG, a little more quality disappears. Keep your original and compress from it.
PNG: sharp, lossless and transparent
PNG is lossless, so it keeps every pixel exactly as it was. That makes it ideal for screenshots, diagrams, logos and any image with sharp lines, flat colours or text, and it supports transparency. The cost is file size. For photographs, a PNG is commonly several times larger than the same photo saved as a JPG, because photos contain millions of subtly different pixels that lossless compression cannot shrink much.
WebP: the modern all-rounder
WebP is a newer format developed by Google. It can work in lossy mode like JPG, in lossless mode like PNG, and it supports transparency. At comparable visual quality, WebP files are often noticeably smaller than JPG or PNG; Google’s own comparisons put the saving at roughly a quarter to a third in many cases. All current major browsers can display WebP.
The remaining catch is compatibility outside the browser. Some older photo editors, document tools and upload forms still reject WebP. When a form or app does not accept it, JPG is the safe choice.
Which should you use?
| Use case | Best choice | Why |
|---|---|---|
| Photo to share in chat or email | JPG | Small and accepted everywhere |
| Photo on your website | WebP (JPG as fallback) | Smaller files load faster |
| Screenshot with text | PNG or WebP | Keeps text crisp |
| Logo with a transparent background | PNG or WebP (or SVG) | Transparency and sharp edges |
| Photo for a government or job form | JPG | Most forms only accept JPG or JPEG |
| Product photo for a shop | JPG or WebP | Depends on the platform’s rules |
How file sizes compare in practice
For a typical photograph the order is predictable: JPG is small, WebP is often smaller still, and PNG is large. For a flat-colour logo or a screenshot the picture changes. Flat areas compress very well losslessly, so PNG can beat JPG, and JPG adds fuzzy artifacts around sharp edges. The lesson is to match the format to the content rather than always using the same one.
How to convert and compress with Lytepic
- Open Lytepic and drop in your image.
- Under Format, choose jpeg, png or webp. “Keep” leaves the format as it is.
- Adjust the quality slider for JPG and WebP, or type a target size in KB and let Lytepic find the best quality that fits.
- Check the before and after preview, then download.
When you convert a transparent PNG to JPG, Lytepic fills the background with white, because JPG has no transparency. If your browser cannot create WebP files, Lytepic tells you and gives you another format instead. Need a specific limit? See how to compress an image to 50KB or 200KB.
Common mistakes to avoid
- Renaming the file extension. Changing photo.png to photo.jpg does not convert anything. The data inside is still PNG and many sites will reject it. Use a converter.
- Re-saving JPGs repeatedly. Each save loses detail. Work from the original.
- Saving photos as PNG. It creates huge files for no visible benefit.
- Uploading WebP where it is not accepted. Check the rules first; convert to JPG if needed.
- Compressing too hard too early. Keep a high-quality master copy and create smaller versions from it.
Frequently asked questions
Is WebP better than JPG?
WebP is often smaller at similar quality and supports transparency, but JPG is accepted almost everywhere. Use WebP for websites you control and JPG for sharing and forms.
Does converting PNG to JPG reduce quality?
Yes. JPG is lossy, so some detail is discarded, and any transparency is replaced by a solid background. For photos the difference is rarely noticeable at 80% quality or higher.
Which image format is best for a website?
WebP for most images, with JPG where compatibility matters, PNG for transparent graphics that WebP cannot cover, and SVG for simple logos and icons.
Why is my PNG file so big?
PNG is lossless, and photos contain far more detail than lossless compression can shrink. Converting the photo to JPG or WebP usually reduces the size dramatically.
Can Lytepic convert HEIC photos?
Lytepic is built for JPG, PNG and WebP. HEIC support depends on your browser, so if a HEIC photo does not open, convert it to JPG first.