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

Three formats, one question that comes up constantly: which one should this particular image actually be? The answer depends less on personal preference and more on two concrete properties: whether compression is lossy or lossless, and whether transparency is needed.

Lossy vs. lossless: the core difference

JPG is lossy. It compresses by discarding image detail the format's algorithm judges least noticeable, which is why a heavily compressed JPG shows visible blockiness or smudging, especially around sharp edges or text. It's excellent for photographs, where its optimizations line up well with smooth gradients and complex color detail, and the compression artifacts are least noticeable in that kind of content.

PNG is lossless. Every pixel comes back exactly as it went in, no detail discarded. That makes PNG the right choice for screenshots, logos, text, and anything with sharp edges or large flat color areas, where JPG's artifacts would actually be visible. The tradeoff: lossless compression can't shrink photographic detail nearly as effectively as JPG's lossy approach, so a PNG of a photo is typically much larger than the same photo as a JPG.

WebP supports both modes. It can compress losslessly, competing directly with PNG's use case, or lossily, competing with JPG's, generally producing smaller files than either at a comparable visual quality. That flexibility is why WebP has become the practical default for a lot of web content: it can cover both jobs PNG and JPG used to split between them.

Image Convert moves between JPG, PNG, WebP, and AVIF, and can batch a whole folder at once, which makes it easy to actually test this rather than guess: convert the same image to a couple of formats and compare the resulting file sizes and visual quality directly.

Where transparency changes the decision

JPG has no transparency channel, period. A JPG's background is always some solid color, there's no way to make part of an image see-through in that format. If a logo, icon, or any image needs to sit on top of a colored or patterned background without a visible box around it, JPG is out regardless of anything else. PNG has supported transparency since it existed. WebP supports it too, including in its lossy mode, which is actually an advantage over JPG that PNG alone doesn't have: a transparent image with smaller-than-PNG file size.

A practical decision path

• Needs transparency? PNG or WebP. Never JPG.
• Sharp edges, flat colors, text, a screenshot or logo? PNG or lossless WebP.
• A photograph, and file size matters? JPG or lossy WebP, usually WebP wins on size at similar quality.
• Uploading somewhere with unknown format support? JPG remains the safest universal fallback; check the specific destination before assuming WebP will be accepted everywhere.

Whichever format you land on, Image Compress shrinks JPG, PNG, and WebP files with a live quality preview, so you can see the actual size-versus-quality tradeoff for your specific image rather than guessing at a quality percentage.

The hidden detail in photos: EXIF metadata

This isn't a format question exactly, but it comes up in the same moment converting or sharing a photo does. Photos straight from a phone or camera often carry EXIF metadata embedded in the file: camera model, timestamp, and sometimes GPS coordinates of where the photo was taken. This travels invisibly with the file unless something strips it out, JPG and some other formats commonly carry it, and it's easy to forget it's there since none of it is visible just looking at the image.

EXIF Data Viewer & Remover shows exactly what's embedded in a given photo's metadata, camera model, date, GPS location if present, then produces a clean copy with all of it stripped. Worth a check before sharing a photo publicly if you'd rather not have its exact location attached, converting formats alone doesn't necessarily strip this metadata, so it's a separate step worth doing deliberately rather than assuming.

Practical takeaways

• Lossy (JPG, lossy WebP) suits photos; lossless (PNG, lossless WebP) suits sharp edges, text, and screenshots.
• Transparency rules out JPG entirely, PNG or WebP are the only options.
• WebP usually wins on file size at comparable quality, in both its lossy and lossless modes, but verify the destination accepts it.
• Check for EXIF metadata separately before sharing a photo publicly, converting format doesn't automatically strip it.

The short version

JPG trades some quality for small photographic file sizes, PNG keeps every pixel exact at the cost of larger files, and WebP generally does both jobs better than either on its own, which is why it's become the practical default. Pick based on whether you need transparency and whether the content is photographic or sharp-edged, and check a photo's EXIF metadata separately if privacy matters, since format conversion alone won't necessarily remove it.