JPG vs PNG vs WebP: Which Image Format Should You Use?
JPG, PNG and WebP are the three image formats you meet everywhere on the web — and picking the wrong one either bloats your page or ruins your picture. JPG is the veteran for photos, PNG keeps every pixel perfect with transparency, and WebP is the modern all-rounder that is smaller than both. This guide compares them head to head so you can choose in seconds.
What is JPG?
JPEG (usually written JPG) is the oldest of the three, standardized in 1992. It uses lossy compression: when you save a photo as JPG, the encoder deliberately throws away fine detail your eyes barely notice — subtle color gradients, faint textures — and stores what remains very compactly. A quality slider (1–100) controls how much gets discarded. At quality 80–85, most photos look identical to the original at a fraction of the size; push it down toward 40 and blocky artifacts creep in.
JPG has two hard limits: no transparency and no animation. It was built for photographs — continuous-tone images where tiny losses are invisible — and three decades later it is still the safest format when compatibility matters, because everything opens a JPG.
If you have a photo to shrink right now, the free image compressor handles it entirely in your browser — nothing is uploaded.
What is PNG?
PNG arrived in 1996 as the patent-free successor to GIF, and it compresses losslessly: every pixel you put in comes back out exactly. Instead of discarding data like JPG, PNG hunts for patterns — large flat areas, repeated colors — and encodes them efficiently. That makes it brilliant for logos, icons, diagrams and interface screenshots with sharp edges and flat colors, and it supports full alpha transparency, so a logo can float over any background.
The price is file size. Photographic PNGs are enormous — often 5–10× the size of an equivalent JPG — because photos contain few repeating patterns for the encoder to exploit. PNG is a precision instrument; aim it at graphics, not at photos.
What is WebP?
WebP is Google's 2010 attempt to replace both formats at once. It offers two modes in a single format: a lossy mode (derived from video compression) that beats JPG on size, and a lossless mode that beats PNG. It also handles transparency and animation, covering PNG's and GIF's jobs too. In Google's published tests, lossy WebP images run about 25–35% smaller than comparable JPGs, and lossless WebP about 26% smaller than PNGs.
The historic objection was browser support — and it is gone. Every current browser opens WebP natively, including Safari since version 14 (2020). If your audience uses reasonably modern software, WebP is simply the best default for the web: smaller files than JPG, sharper results than JPG at the same size, and transparency thrown in.
JPG vs PNG vs WebP at a glance
| JPG | PNG | WebP | |
|---|---|---|---|
| Compression | Lossy | Lossless | Lossy or lossless |
| Transparency | No | Yes (alpha) | Yes (alpha) |
| Animation | No | No (that is APNG) | Yes |
| Best for | Photos, realistic images | Logos, icons, screenshots, text graphics | Web photos and graphics on modern browsers |
| Typical weakness | Artifacts at high compression; no transparency | Huge files for photos | Rejected by some very old software and upload forms |
| Browser support | Universal | Universal | All modern browsers (since ~2020) |
How big is the difference? A worked example
Take a typical 1920×1080 landscape photo straight from a phone, saved three ways. (These are typical figures — your images will vary, which is exactly why you should test your own):
| Format | Settings | Typical file size | What you see |
|---|---|---|---|
| PNG | lossless | ~1.6 MB | Perfect — and far too big for the web |
| JPG | quality 80 | ~260 KB | Visually near-identical, 6× smaller than PNG |
| WebP | quality 80 | ~160 KB | Same look, another ~35% off the JPG |
The gap widens with resolution: a 4K photo as PNG can exceed 8 MB, while WebP keeps it under a megabyte. Now flip the image type — a company logo, 800×600 with a transparent background: PNG lands around 90 KB, perfectly crisp; WebP lossless around 65 KB, equally crisp. JPG is not an option here at all, because it has no transparency and the background would come out white or black.
The pattern is simple: photos compress dramatically with lossy formats; graphics with flat colors stay small only in lossless ones. When in doubt, export your image in all three and compare — the image compressor shows you size and quality side by side in seconds.
Which format should you use? A decision guide
- Photos on a website or app → WebP first, JPG as a fallback for ancient browsers. This is the single biggest easy win for page speed.
- Logos, icons, UI graphics with transparency → PNG for maximum compatibility, WebP lossless if your audience is modern.
- Screenshots → PNG when the shot is mostly interface (text stays razor-sharp); JPG or WebP when it is mostly photographic content.
- Uploading to social media or email → JPG. Every platform accepts it, and they recompress your upload anyway.
- Archiving originals → keep the camera RAW or a PNG/TIFF master. Never archive in lossy JPG if you plan to edit again — every re-save degrades quality.
- Print → none of these are ideal; ask your printer, usually PDF or TIFF.
How to convert between JPG, PNG and WebP
Converting is a one-click job: open the image compressor, drop in your JPG or PNG, pick WebP as the output, and download the result — all in your browser, nothing uploaded. Going the other way (WebP → JPG/PNG) works the same for the rare cases you need legacy compatibility.
One rule governs every conversion: start from the highest-quality source you have. Turning a heavily compressed JPG into a PNG will not restore the detail the JPG threw away — it just produces a bigger file with the same artifacts baked in.
Practical tips
- Quality 80 is the web sweet spot. For JPG and WebP photos, quality 75–85 gives files a fraction of the original size with no visible loss. Below 60, artifacts appear; above 90, file size balloons for no visible gain.
- Never re-save a JPG as a JPG repeatedly. Each save re-compresses the already-compressed data, and quality decays with every round trip. Edit from the original, export to JPG once, at the end.
- Test on your actual image. Format rankings flip with content: a flat-color illustration can be smaller as PNG than as JPG, and a noisy photo compresses worse everywhere. Thirty seconds of testing beats any rule of thumb.
- Serve WebP with a fallback. The HTML
<picture>element lets you offer WebP first and JPG/PNG second — modern visitors get the smaller file, everyone else still sees the image. - Watch the transparency trap. Converting PNG → JPG silently fills transparent areas (usually white). If your graphic needs transparency, convert to WebP instead of JPG.
- Animation is a separate decision. WebP animates and is far smaller than GIF, but if you need universal animation support (email clients, old apps), GIF remains the conservative choice.
Try it yourself
Compress and convert your images right in your browser — shrink a photo to WebP and watch the file size drop, with no upload involved.
Frequently asked questions
Is WebP better than JPG?
For web use, yes in most cases. In Google's published tests, lossy WebP images are about 25–35% smaller than JPGs of comparable quality, while also supporting transparency and animation that JPG lacks. The old objection was browser support, but every modern browser — including Safari since version 14 — opens WebP natively. The one reason to keep JPG around is compatibility with very old software or platforms that still reject WebP uploads.
Can a JPG have a transparent background?
No. The JPG format has no alpha (transparency) channel, so there is no way to store see-through pixels in it. If you convert a transparent PNG to JPG, the transparent areas get filled — usually with white or black. For logos, icons or any graphic that must float over a background, use PNG or WebP instead.
Is PNG always bigger than JPG?
For photographs, yes — dramatically. A photo saved as PNG is often 5–10 times larger than the same photo as a quality-80 JPG, because PNG's lossless compression finds few repeating patterns in photographic detail. But for simple graphics with flat colors and sharp edges — logos, diagrams, UI screenshots — PNG can actually be smaller than JPG while staying perfectly crisp. It depends entirely on the image content.
Does WebP work in all browsers?
In all modern ones. Chrome, Firefox, Edge and Safari have supported WebP since around 2020 (Safari added it in version 14), so the overwhelming majority of real-world visitors can open it. If you must serve users on very old browsers or legacy systems, the standard practice is to serve WebP with a JPG or PNG fallback using the HTML picture element — modern visitors get the smaller file, everyone else still sees the image.
Should I convert all my JPGs to WebP?
For images you publish on the web, usually yes — you get noticeably smaller files with no visible quality loss. But keep your originals: convert from the highest-quality source you have, and archive the original file separately. Converting a heavily compressed JPG to WebP cannot restore detail the JPG already threw away, and re-compressing a lossy file a second time degrades it further.
Why are my PNG screenshots so large?
Because PNG is lossless and screenshots of photographic content — video stills, game captures, photos inside a browser window — contain the kind of fine detail that lossless compression handles poorly. A full-screen photo-like screenshot can easily reach several megabytes as PNG. If the screenshot is mostly a photo, save it as JPG or WebP instead; keep PNG only for interface screenshots where text and sharp edges must stay razor-sharp.