JPEG, PNG, GIF, WebP Formats Explained
There are maybe eight image formats that actually matter in day-to-day work, and yet I still see people agonizing over which one to pick. I’ve watched a designer spend twenty minutes debating JPEG versus PNG for a hero banner that was clearly a photograph. (It’s JPEG. It’s always JPEG for photos. We’ll get there.)
The truth is, picking the right format isn’t complicated once you understand what each one was built to do. So here’s the real breakdown — not just specs and bullet points, but when and why you’d actually reach for each one.
Quick Reference: Which Format Should You Use?
| Use Case | Best Format | Why |
|---|---|---|
| Photographs | JPEG or WebP | Good compression, small files |
| Logos and icons | PNG or SVG | Sharp edges, transparency support |
| Graphics with text | PNG | Crisp text, no compression artifacts |
| Animated images | GIF or WebP | Animation support |
| Images needing transparency | PNG or WebP | Alpha channel support |
| Print-quality images | TIFF or PNG | Lossless, high quality |
| Modern web (best performance) | WebP | Smaller than JPEG and PNG |
That table will get you 90% of the way there. But if you want to actually understand the trade-offs (and avoid those “why does my logo look crunchy?” moments), keep reading.
JPEG: The Reliable Workhorse That’s Been Around Forever
Here’s a scenario you’ve probably lived through: you upload a product photo to your site and it looks great. Sharp, vibrant, loads fast. That’s JPEG doing exactly what it was designed for — compressing photographs into reasonably small files while keeping them looking good to the human eye.
JPEG achieves this through lossy compression, which means it permanently throws away some image data to shrink the file. Sounds scary, but for photographs — images with gradients, lots of colors, organic textures — you genuinely can’t tell the difference at quality settings above 70%. It supports millions of colors (24-bit), works in literally every browser and device on the planet, and gives you a quality slider so you can dial in exactly the balance you need between file size and sharpness.
Where JPEG falls apart is anything with hard edges. Try saving your company logo as a JPEG and you’ll see ugly, smudgy halos around the text and clean lines. That’s compression artifacts doing their thing, and it’s the #1 sign someone picked the wrong format. Same deal with screenshots — any image with crisp text gets mangled.
The other limitation: no transparency. If you need a logo on a transparent background, JPEG literally can’t do it. The format was born in 1992, transparency wasn’t on the radar.
JPEG Quality Settings
| Quality | File Size | Best Use |
|---|---|---|
| 90-100% | Large | Archival, when quality is critical |
| 75-89% | Medium | Hero images, featured photos |
| 60-74% | Small | Standard web images |
| Below 60% | Very small | Thumbnails (visible artifacts) |
My sweet spot for most web images? 75-80%. You’d need to zoom in and squint to see any difference from the original, and the file size savings are dramatic.
Convert to JPEG: Use our PNG to JPG converter or WebP to JPG converter.
PNG: When Every Pixel Has to Be Perfect
If JPEG is the format you use for photos, PNG is the one you reach for when precision matters. Lossless compression means not a single pixel changes from your original — what you save is exactly what you get back. That makes it perfect for logos, icons, screenshots, UI mockups, and anything with text baked into the image.
The killer feature, though, is transparency. Full alpha channel support means you can have smooth, anti-aliased edges on a transparent background. Think of every logo overlay, every floating button graphic, every product image on a white-background-that-isn’t-really-there. That’s PNG doing the work.
I once inherited a website where someone had saved every single image as PNG, including dozens of large photographs. The homepage alone was loading 15MB of images. Photographs in PNG are massive compared to JPEG — we’re talking 3-5x larger — because lossless compression can’t exploit the same shortcuts that lossy can when dealing with complex photographic detail. Converting those photos to JPEG cut the page weight by about 70% with no visible quality loss.
One detail worth knowing: there’s actually two flavors. PNG-8 is limited to 256 colors (like GIF) and produces tiny files for simple graphics — think solid-color icons or simple diagrams. PNG-24 is the full-featured version with millions of colors and that smooth alpha transparency. Most of the time when people say “PNG,” they mean PNG-24.
Convert to PNG: Use our JPG to PNG converter or WebP to PNG converter.
GIF: Honestly Showing Its Age
I’m going to be a little controversial here: GIF is a format we keep around mostly out of habit and cultural momentum. It was revolutionary in 1987. In 2025, it’s a 256-color format that produces bloated animation files. We call all short looping videos “GIFs” now, but most of those “GIFs” you see on Twitter and Slack are actually being served as MP4 or WebP behind the scenes. (If you want the full story on GIF’s strengths, quirks, and modern conversion options, our GIF format guide goes deep.)
That said, GIF still has its place. The format is dead simple, universally supported, and for tiny animations — a loading spinner, a small reaction image, a subtle UI flourish — it gets the job done without any fuss. The 256-color limitation means photographs look absolutely terrible (banding and dithering everywhere), but for graphics with flat colors, it’s fine.
The real problem is file size. A 5-second GIF can easily balloon to several megabytes. WebP animations are typically 30-50% smaller at better quality, and if your animation is longer than a couple seconds, you should really be using video (MP4 with the <video> tag, set to autoplay and loop — it looks identical and loads way faster).
Where GIF still genuinely wins: compatibility. It works everywhere, in every email client, in every messaging app, in ancient browsers. When you absolutely cannot risk a format not being supported, GIF is the safe bet. But for anything on your own website, where you control the stack? You’ve got better options.
Convert to GIF: Use our PNG to GIF converter or JPG to GIF converter.
WebP: The One I’d Pick If I Could Only Choose One
If I could wave a magic wand and convert every image on the web to a single format, it’d be WebP. Google built it to be the Swiss Army knife of image formats, and it genuinely delivers. Lossy compression that beats JPEG by 25-35% at the same visual quality. Lossless compression that’s smaller than PNG. Transparency support. Animation support. It does everything.
I’ve run the tests on real production sites. Take a typical e-commerce product page with 20 images — switching from JPEG to WebP at equivalent quality shaved off about 30% of image weight. That’s not nothing. On mobile connections, that’s the difference between a page that feels snappy and one that feels sluggish.
The “but does it work in all browsers?” concern is basically over. WebP support sits above 97% globally now. The only holdouts are some very old browser versions that represent a vanishing slice of real traffic. Unless you’re specifically targeting users on decade-old devices, WebP is safe to use.
So why isn’t everyone using it? Partly inertia — people know JPEG and PNG and don’t see a reason to change. Partly tooling — not every image editor handles WebP natively yet, though that’s improving fast. And partly workflow: if you’re sending images to a print shop or attaching them in emails to clients who might be on older software, JPEG and PNG are still the safer choices for that handoff.
WebP vs JPEG vs PNG
| Feature | JPEG | PNG | WebP |
|---|---|---|---|
| Compression | Lossy | Lossless | Both |
| Transparency | No | Yes | Yes |
| Animation | No | No | Yes |
| File size (photo) | Medium | Large | Small |
| Browser support | 100% | 100% | 95%+ |
Convert to WebP: Use our PNG to WebP converter or JPG to WebP converter.
TIFF: The Format You Get From Print People
You probably won’t encounter TIFF much unless you work with photographers, print designers, or anyone in publishing. And then one day, a designer drops a 45MB TIFF into your shared folder and asks you to “put it on the website.” Don’t do that.
TIFF exists for a very specific reason: maximum quality preservation for professional workflows. It’s lossless (usually), supports layers, embeds rich metadata, handles CMYK color spaces for print, and generally acts as the archival master format that creative professionals work from. Photographers shoot RAW, edit in Lightroom or Capture One, and export as TIFF when they need a lossless deliverable.
For the web, TIFF is a non-starter. The files are enormous, most browsers won’t render them natively, and there’s zero advantage over PNG for lossless web images. If someone hands you a TIFF for web use, the move is to convert it to JPEG (for photos) or PNG (for graphics) before it goes anywhere near your site.
But for what it’s designed for — preserving maximum quality in a professional pipeline — TIFF is rock solid and isn’t going anywhere.
Convert from TIFF: Use our TIFF to JPG converter or TIFF to PNG converter for web use.
BMP: You Can Probably Ignore This One
BMP is a relic from early Windows. It stores images with virtually no compression, resulting in massive files. I’m including it here because you’ll occasionally run across BMP files in legacy enterprise systems, old desktop applications, or when someone exports from ancient software.
There’s no good reason to use BMP for anything new. If you find yourself with BMP files, convert them and move on.
Convert from BMP: Use our BMP to JPG converter or BMP to PNG converter.
HEIC: Apple’s Walled Garden Format
If you’ve ever AirDropped photos from an iPhone to a Windows PC and gotten a bunch of files that nothing can open, you’ve met HEIC. (We wrote an entire HEIC to JPG conversion guide because this exact scenario is that common.) It’s Apple’s default photo format starting from iOS 11, and to be fair, it’s technically impressive — similar quality to JPEG at roughly half the file size.
The problem is the ecosystem. HEIC works great within Apple’s world: iPhones, iPads, Macs, iCloud. Step outside that bubble, and it’s a headache. Most browsers can’t display it. Windows needs a special codec extension. Many web platforms and CMS tools don’t accept it. If you’re building a website or sharing images with anyone who might not be on Apple hardware, you need to convert HEIC to something universal first.
A quick tip: you can actually change your iPhone settings to capture in JPEG instead (Settings > Camera > Formats > Most Compatible). Worth considering if you frequently share photos outside the Apple ecosystem.
Convert from HEIC: Use our HEIC to JPG converter or HEIC to PNG converter.
SVG: Not Really an “Image” Format (But You Should Know It)
SVG is the oddball on this list because it doesn’t store pixels at all. It’s a vector format — essentially a text file full of mathematical instructions that describe shapes, lines, and curves. That means an SVG logo looks razor-sharp whether it’s 16 pixels wide in a favicon or blown up to billboard size.
For logos, icons, and simple illustrations, SVG is unbeatable. The files are typically tiny (often smaller than a compressed JPEG of the same graphic), they scale infinitely, you can style them with CSS, animate them with JavaScript, and even edit them in a text editor if you know what you’re doing. Most modern icon libraries ship as SVGs for exactly these reasons.
The catch: SVG can’t handle photographs or complex raster imagery. It’s built for shapes with clean lines and solid or gradient fills. Try to represent a photograph as SVG and you’ll end up with a file that’s orders of magnitude larger than JPEG — if you can even get it to work at all.
Format Comparison Chart
| Format | Lossy/Lossless | Transparency | Animation | Best For |
|---|---|---|---|---|
| JPEG | Lossy | No | No | Photos |
| PNG | Lossless | Yes | No | Graphics, logos |
| GIF | Lossless* | Basic | Yes | Simple animations |
| WebP | Both | Yes | Yes | Modern web |
| TIFF | Lossless | Yes | No | Print, archival |
| BMP | None | No | No | Legacy use |
| HEIC | Lossy | No | No | iOS photos |
| SVG | Vector | Yes | Yes | Icons, logos |
*GIF is lossless but limited to 256 colors
How to Choose the Right Format (The Short Version)
After working with thousands of images across dozens of projects, here’s how I actually think about format selection in practice:
Is it a photograph? WebP first, JPEG as your fallback. There’s really no reason to deliberate beyond that. If you’re optimizing for every last byte (and you probably should be), WebP wins. If you need the broadest possible compatibility — emails, legacy systems, clients who get confused by unfamiliar file extensions — JPEG is the universal language.
Is it a logo, icon, or graphic with clean lines? Check if you have the vector source. If yes, SVG, full stop. If you only have a raster version, PNG gives you the transparency and crispness you need. Never, ever save a logo as JPEG. I’ve seen too many company logos with that telltale JPEG fuzz around the edges, and it just looks unprofessional.
Is it a screenshot? PNG. Screenshots have text, sharp UI edges, and flat color areas — exactly what PNG’s lossless compression handles beautifully. JPEG will make your text look like it’s being viewed through a dirty window.
Is it an animation? For anything on your own site, WebP animations give you the best quality-to-size ratio. GIF works everywhere but the files are bigger. And if the animation is longer than a few seconds, seriously consider video instead. A 10-second GIF can be 10MB. The same thing as an MP4 might be 500KB.
Converting Between Formats
Need to change formats? Our comprehensive format conversion guide covers the best practices for every conversion path. And BulkImagePro’s converter handles batch conversions between all common formats:
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FAQ
Why are my PNG files so large?
PNG uses lossless compression, which means it keeps every single pixel of your original image intact. That’s great for quality, but it means the format can’t use the aggressive tricks that JPEG and WebP use to shrink photos. If you’re saving photographs as PNG, you’re likely getting files 3-5x larger than you need. Switch those photos to JPEG or WebP and keep PNG for graphics, logos, and screenshots where lossless quality actually matters.
Should I use WebP for all my images?
For anything going on a website, WebP is almost always the right call. It handles photos better than JPEG (smaller files, same quality) and handles graphics with transparency better than PNG (again, smaller files). The only times I’d hesitate are when you’re sending images outside the web — email attachments to non-technical recipients, files for a print shop, or assets going into software that doesn’t support WebP yet. For those cases, JPEG and PNG are still the safe choices.
What format should I save my original images in?
Always keep your originals in a lossless format — PNG or TIFF. Think of it like keeping the master recording. You can always create compressed JPEG or WebP versions from a lossless original, but you can never get quality back once it’s been lost through lossy compression. I’ve seen people save their only copy of an image as a low-quality JPEG, then need a higher-quality version later. Don’t be that person. Save the lossless master, export compressed versions as needed.
How do I reduce image file size?
Three steps, in order of impact: First, make sure you’re using the right format — JPEG or WebP for photos, PNG for graphics. Second, resize to the actual dimensions you need. There’s no point serving a 4000px-wide image in a 800px container; that’s wasted bandwidth. Third, run your images through a compression tool like BulkImagePro to squeeze out the extra bytes without visible quality loss. Those three steps together can easily cut image file sizes by 80% or more.
What’s the difference between JPG and JPEG?
Absolutely nothing. They’re the same format, the same compression, the same everything. The .jpg extension became common because early versions of Windows (we’re talking the DOS and Windows 3.1 era) could only handle three-character file extensions. Mac and Linux never had that limitation, so they used .jpeg. These days either extension works everywhere, but .jpg is more common simply because old habits die hard.
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