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

Every image you save has to be stored in some format, and that choice quietly affects how fast your website loads, how sharp your logo looks, and how large your photo library gets. JPG, PNG, and WebP are the three formats you'll run into almost everywhere, and each one was built to solve a different problem. None of them is "the best" in every situation — the right pick depends on what's actually in the image and where it's going. This guide walks through what each format does differently, when to reach for which one, and how to convert between them using Kravoy's Image Converter.

What JPG Is

JPG (or JPEG) is a lossy photographic format — it compresses images by discarding detail the human eye is unlikely to notice, like subtle color gradients and high-frequency texture. This makes it very good at shrinking complex, colorful images like photos, but not so good at flat-color graphics like screenshots or logos, where the same lossy compression tends to blur sharp edges and create visible blocky artifacts around text. JPG doesn't support transparency — every JPG has a solid background, even if the original image had a transparent one.

What PNG Is

PNG is a lossless format — it compresses a file without throwing away any pixel data, so what you save is exactly what you get back, pixel for pixel. That makes it the right choice for anything where exact detail matters: screenshots, logos, diagrams, text-heavy graphics, and anything with sharp edges or flat areas of color. PNG also supports transparency (an alpha channel), which is why it's the default for logos and icons that need to sit on top of different backgrounds. The tradeoff is file size — because PNG can't discard detail the way JPG does, a PNG of a busy photograph is often several times larger than an equivalent JPG at a quality level most people can't visually tell apart.

What WebP Is

WebP is a newer format built by Google specifically to beat both JPG and PNG on file size while matching their capabilities. It supports both lossy compression (like JPG) and lossless compression (like PNG), plus transparency — so it can replace either format depending on how it's encoded. In practice, WebP images are typically 25–35% smaller than a JPG or PNG of the same visual quality. Browser support is now effectively universal (every major browser has supported it for years), which is why it's become the default recommendation for web images where file size matters.

Compression Differences

This is the core distinction between all three formats:

• JPG — always lossy. There's no lossless mode; you choose a quality level and some detail is always discarded.
• PNG — always lossless. It can be optimized to store the same exact data more efficiently, but it can't be made lossy.
• WebP — can do either. Its lossy mode competes directly with JPG; its lossless mode competes directly with PNG, and usually wins on size in both cases.

Transparency Support

Only PNG and WebP support transparent backgrounds. If you need an image to sit cleanly on top of a colored section, a photo, or a dark and light theme without a visible box around it, JPG is not an option — it will always fill transparent areas with a solid (usually white) background. PNG has been the safe default for this for years; WebP does the same job at a smaller file size, so it's worth using instead wherever the platform supports it.

Quality Differences

At high quality settings (85%+), JPG and lossy WebP are both close to visually indistinguishable from the original for typical photos. Where they diverge is at lower quality settings: JPG tends to show blocky artifacts around edges first, while WebP's compression algorithm generally holds up a bit better at the same file size, which is part of why it produces smaller files at equivalent visual quality. PNG, being lossless, has no "quality setting" in the same sense — it's either the exact original or it isn't PNG anymore.

Typical File Sizes

For a rough sense of scale, a 1920×1080 photo might come out to roughly:

• PNG: 2–4 MB (lossless, storing full detail)
• JPG (quality 80): 200–400 KB
• WebP (quality 80): 150–300 KB

These numbers shift a lot based on how much detail and color variation is actually in the image — a simple graphic compresses much smaller than a busy, detailed photo in any format.

Comparison Table

Real-World Situations

Photography

For photos — portraits, landscapes, product shots taken with a camera — JPG or lossy WebP are the right call. PNG will preserve every detail losslessly, but at a file size that rarely justifies the gain for a photo, since the human eye can't perceive most of what PNG is protecting. WebP is the better pick when the platform supports it; JPG remains the safer choice for maximum compatibility with older software, printers, or platforms that don't accept WebP uploads.

Logos and Graphics

Logos need PNG or WebP, not JPG — both because they typically need a transparent background and because their flat colors and sharp edges compress poorly and visibly under JPG's lossy algorithm (edges get blurry, flat colors get noisy). PNG is the universal default here; WebP does the same job smaller if you're using it on a website.

Screenshots

Screenshots are almost always better as PNG. They're full of sharp text edges, flat UI colors, and fine lines — exactly the content JPG compresses worst. A screenshot saved as JPG often looks noticeably blurrier around text and isn't reliably smaller than a properly compressed PNG of the same image.

Social Media Images

Most social platforms recompress whatever you upload anyway, so the practical goal is just staying under their size/dimension limits without starting from an unnecessarily bloated file. JPG at a solid quality setting (80–90%) works well for photo-based posts; use PNG or WebP if the graphic includes text, a logo, or needs a transparent background.

E-Commerce Product Images

Product photography benefits the most from getting this choice right, since a typical product page loads many images at once. WebP is usually the best option today — it keeps photographic detail close to JPG quality at a meaningfully smaller size, which adds up fast across a full product gallery. Product images that include transparent backgrounds (isolated product shots) need PNG or WebP; JPG can't do it.

Converting Between Formats with Kravoy's Image Converter

Once you know which format you need, the Image Converter handles the actual conversion in a few steps:

1. Upload your image. It accepts JPG, PNG, WebP, and even HEIC photos straight from an iPhone.
2. Pick your output format. Choose PNG, JPG, or WebP from the format options.
3. Preview and download. The converted file is generated instantly in your browser — nothing is uploaded to a server, so your original image never leaves your device.

If your goal is specifically to shrink a file's size rather than just change its format, the Image Compressor converts to JPG or WebP with a live quality slider so you can balance size against visual quality directly. And if the image's dimensions are larger than they need to be for where it's being used, the Image Resizer handles that separately — resizing down first, then compressing or converting, usually gives the smallest final file.

Frequently Asked Questions

Is WebP always better than JPG and PNG?
It's usually smaller at equivalent quality and supports transparency, which makes it the better default for websites. It's not "always better" in an absolute sense — JPG still wins on compatibility with very old software, and there's rarely a reason to reach for lossless PNG-style WebP over regular PNG unless file size specifically matters.

Can I convert a JPG to PNG without losing quality?
Yes — going from JPG to PNG doesn't lose any additional quality, since PNG is lossless and simply stores whatever pixel data the JPG had at the time of conversion. It won't undo quality already lost when the JPG was originally compressed, though, and the resulting PNG will likely be larger than the JPG it came from.

Which format should I use for a website?
WebP for most images, since it loads faster without a visible quality tradeoff. Use PNG specifically where you need transparency and WebP support is uncertain, and JPG where maximum compatibility with very old browsers or tools matters more than file size.

Does converting PNG to JPG reduce file size?
Usually significantly, since JPG's lossy compression is built for exactly this. The tradeoff is that any transparency is lost (filled with a solid background) and some image detail is discarded — worth it for photos, not for logos or screenshots with text.