Image File Formats Explained: JPG vs PNG vs WebP vs HEIC vs SVG vs GIF and When to Use Each

Last updated: October 2026

Use JPG for photographs you share widely, PNG for graphics with sharp edges or transparency, WebP or AVIF for images on your own website, HEIC only for storing iPhone photos, SVG for logos and icons, and GIF only when nothing else will do. That one sentence settles most format questions. The rest of this guide explains why, so you can handle the cases that do not fit.

Picking the wrong format rarely breaks anything outright. It quietly costs you instead: a website that loads slowly, a logo that blurs on a retina screen, an iPhone photo that will not open on a client's laptop, a banner that looks fine on your screen and muddy on LinkedIn. Each of those is avoidable once you know what a format actually does.

The short answer: which format should you use?

Format	Compression	Transparency	Animation	Best for	Avoid for
JPG	Lossy	No	No	Photos, everyday sharing	Logos, text, anything needing transparency
PNG	Lossless	Yes	No	Graphics, screenshots, logos	Large photos
WebP	Lossy or lossless	Yes	Yes	Websites and blog images	Platforms that reject it
AVIF	Lossy or lossless	Yes	Yes	Smallest web photos	Anywhere you need guaranteed support
HEIC	Lossy	Yes	Limited	Storing iPhone photos	Sharing, uploading, websites
SVG	Vector	Yes	Yes	Logos, icons, simple illustrations	Photographs
GIF	Lossless but limited to 256 colors	Limited	Yes	Short, simple loops where required	Photos, long clips

If you only remember one row of that table, remember this: the format should match the content. Photographs and graphics are different kinds of picture, and each has a format built for it.

Two ideas that explain every format

Almost every format comparison comes down to two distinctions.

Raster versus vector. A raster image is a grid of colored pixels, and JPG, PNG, WebP, AVIF, HEIC and GIF all work this way. Enlarge one past its original size and the pixels become visible as blur or blocks. A vector image, which is what SVG is, stores shapes and instructions instead: draw a circle here, fill it with this color, draw a curve there. Because the instructions describe shapes rather than pixels, a vector scales to any size and stays crisp.

Lossy versus lossless. Lossy compression shrinks a file by throwing away detail the eye is least likely to miss. JPG is the classic example. Lossless compression shrinks a file without discarding anything, so you can decompress it and get back exactly what went in. PNG is lossless. Lossy files are much smaller, but every time you save a lossy image again, a little more detail goes, which is why a photo that has been edited and resaved ten times looks worse than the original.

Keep those two ideas in mind and the rest of this guide is just applying them. A photograph has millions of subtle color changes, so lossy compression handles it well and lossless compression produces enormous files. A logo has flat colors and hard edges, so lossless handles it well, and lossy compression leaves visible smudges around the edges.

JPG: the default for photos

JPG, also written JPEG, dates from the early 1990s and is still the most widely supported image format on earth. Every browser, phone, operating system, email client, social platform and print service handles it. That universal support is its real strength, more than its compression.

JPG is lossy, and it lets you pick the trade between size and quality. A quality setting of roughly 80 to 85 is a common sweet spot for web use, small enough to load quickly and good enough that most people will not see the difference from the original. Push the setting much lower and you start to see blocky patches and fuzzy halos around edges, especially in skies and gradients.

Use JPG for: photographs, product shots, headshots, blog images where you want maximum compatibility, email attachments, and anything you are uploading to a platform without knowing its rules.

Avoid JPG for: logos, screenshots with text, and anything with transparency. JPG has no transparency at all, so a cutout saved as JPG comes with a solid background. It also has no animation.

Two habits protect JPG quality. Keep your original file and export JPG copies from it, instead of editing and resaving the same JPG repeatedly. And resize before you compress, not after.

PNG: sharp edges and transparency

PNG arrived in the mid 1990s as a better replacement for GIF, and it does one thing JPG cannot: it keeps every pixel exactly as it was. That makes it the right choice for anything with hard edges, flat color, or text, because those are exactly the things lossy compression smudges.

PNG also supports full transparency, with smooth, soft edges rather than the jagged on or off transparency GIF offers. That is why logos, icons, cutouts, stickers and overlays are almost always PNG. A product photo with the background removed needs a format that can hold the empty space, and PNG does.

The cost is file size. A photograph saved as PNG is often three to five times larger than the same photograph saved as JPG, because lossless compression has to preserve every tiny variation. A page full of PNG photos is a slow page.

Use PNG for: logos, icons, screenshots, charts, graphics with text, images with transparency, and any file you plan to edit again, since it does not degrade when resaved.

Avoid PNG for: photographs you plan to publish on the web or send by email, unless transparency is essential.

A common trap is converting a JPG to PNG in the hope of improving quality. It does not. The detail the JPG discarded is gone for good, and the PNG simply stores the already damaged picture losslessly, at a much larger size. Convert to PNG when you need transparency or a lossless working copy, not to repair quality.

WebP: the modern default for websites

Google introduced WebP in 2010, and it has quietly become the sensible default for images on the web. It works in both modes: lossy like JPG and lossless like PNG. It supports transparency in either mode, and it supports animation.

The savings are real. Google reports that lossy WebP images are roughly 25 to 34 percent smaller than comparable JPG images at the same measured quality, and lossless WebP images are about 26 percent smaller than PNG. Lossy WebP with transparency is typically around three times smaller than a PNG that does the same job. Smaller files mean faster pages, lower bandwidth, and better scores on the speed measures search engines care about.

Browser support is no longer a concern for most sites, with third party tracking putting it above 97 percent of browsers worldwide. The remaining friction is elsewhere. Some older apps cannot open WebP files, some upload forms reject them, and some social platforms and scheduling tools handle them inconsistently. That is why people so often find themselves converting WebP back to JPG or PNG after downloading an image from a website.

Use WebP for: images on your own site, blog posts, landing pages, and anywhere you control how the image is served.

Avoid WebP for: files you are sending to people, uploading to unknown platforms, or opening in older software, where JPG or PNG is the safer bet.

AVIF: the smallest files, with caveats

AVIF is the newest format in this guide, released in 2019 by the Alliance for Open Media and built on the AV1 video codec. At similar visual quality it typically produces files roughly half the size of JPG, and in many tests meaningfully smaller than WebP too. It supports transparency, animation, and wide color and HDR images, which makes it a good fit for rich photography.

Two caveats matter. Support is strong but not universal, at roughly 93 to 96 percent of browsers depending on whose tracking you read, so serious sites serve AVIF with a WebP or JPG fallback for the rest. And AVIF is slow to encode, which matters if you are producing thousands of images, though not if you are converting a handful.

Use AVIF for: photographic images on your own site where every kilobyte counts, served with a fallback.

Avoid AVIF for: anything you are handing to someone else or uploading to a platform, since the receiving app may not understand it.

HEIC: why your iPhone photos will not open

HEIC is Apple's version of the HEIF image standard, and iPhones have used it by default since iOS 11 in 2017. It stores roughly the same visual quality as JPG in about half the space, which is why Apple chose it: an iPhone shooting thousands of high resolution photos benefits enormously from smaller files.

The trouble starts the moment a HEIC file leaves the Apple world. Windows does not open HEIC files without an extra codec from the Microsoft Store. Many websites and content management systems refuse HEIC uploads. Print services rarely accept it, and most browsers do not display it. The typical result is a client emailing you "I cannot open your photo."

You have two ways to handle it. You can switch the camera to JPG by going to Settings, then Camera, then Formats, and choosing Most Compatible, though that makes new photos larger and does not change photos you already took. Or you can leave the camera on HEIC, which is the more efficient choice, and convert individual files when you need to share them. Our HEIC to JPG tool handles the everyday case, and HEIC to PNG is there when you want lossless quality for editing.

Use HEIC for: storing photos on an Apple device.

Avoid HEIC for: sharing, emailing, uploading, or publishing. Convert to JPG first.

SVG: vector graphics that never blur

SVG is the odd one out, because it is not a grid of pixels at all. An SVG file is a short piece of text that describes shapes, paths and colors, and the browser draws them at whatever size is needed. That has several practical effects.

It scales perfectly. The same SVG logo looks sharp on a phone, a 4K monitor and a billboard. A PNG logo would need a different file for each.

It is tiny. A simple logo or icon can be a few kilobytes, smaller than almost any raster equivalent.

It is editable and styleable. You can change colors with a line of code, animate parts of it, and open it in a text editor to see exactly what it contains.

It supports transparency natively, as a consequence of being shapes on an empty canvas.

SVG has two limits. It is a poor fit for photographs, since describing a photo as shapes is impractical. And many social platforms and upload forms reject SVG files outright, so a logo that works beautifully on your website may need to become a PNG before you can use it on LinkedIn or in a presentation. Our SVG to PNG converter covers that gap.

One more point worth knowing: because SVG is code, it can contain scripts. Only use SVG files from sources you trust, and be careful about letting strangers upload SVG files to anything you run.

Use SVG for: logos, icons, simple illustrations, diagrams, and any graphic that has to look sharp at many sizes.

Avoid SVG for: photographs, and uploads to platforms that do not accept it.

GIF: still here, mostly for the wrong reasons

GIF dates from 1987 and is limited to 256 colors per frame, which is why photographic GIFs look grainy and banded. It supports animation, which is the entire reason it survived, and it supports only simple transparency, where a pixel is fully see through or fully solid, giving rough edges around anything curved.

By modern standards GIF is a heavy format for what it delivers. A short GIF can run to several megabytes. Google has reported that converting animated GIFs to lossy animated WebP can cut file size by around 64 percent, and short MP4 video does better still for anything longer than a couple of seconds, with far better color.

Why does GIF persist? Because it works almost everywhere without thought, including some email clients, chat apps and platforms that accept nothing else. That is a good reason to use it occasionally and a bad reason to default to it.

Use GIF for: short, simple loops on a platform that requires it, and for reaction style images in chat.

Avoid GIF for: anything photographic, anything longer than a few seconds, and your own website, where animated WebP or video is far lighter. If you only need a still from an animation, GIF to JPG and GIF to PNG pull out a frame, and GIF to WebP shrinks the animation itself.

TIFF, BMP and ICO: the specialist formats

Three older formats come up often enough to be worth a short explanation.

TIFF is a high quality format favored by print shops, photographers and archivists. It can store images with little or no compression and rich color information, which makes files large and unsuitable for the web. If a printer asks for TIFF, convert with JPG to TIFF or PNG to TIFF. To bring a TIFF back to something shareable, use TIFF to JPG.

BMP is a simple, uncompressed format from the early days of Windows. Files are enormous, and almost nothing new produces them, but legacy software and embedded systems still ask for it. BMP to JPG and BMP to PNG shrink them dramatically.

ICO is the format for Windows icons and browser favicons. If you are setting up a website, the Favicon Generator builds the full package from one image, including the ICO file, an Apple touch icon, Android icons and a web manifest, and PNG to ICO covers the simple case.

How to choose: format by situation

When in doubt, start from what the image is for.

Situation	Best format	Why
Photo on your website	WebP or AVIF, with a JPG fallback	Smallest files, fast pages
Photo you are sending to someone	JPG	Opens everywhere
Photo for a social post	JPG	Accepted by every platform
Logo on your website	SVG	Sharp at every size, tiny file
Logo for a slide deck or social upload	PNG	Transparent and widely accepted
Screenshot with text	PNG	Keeps text crisp
Image with transparent background	PNG, or WebP on your own site	Holds the empty space
iPhone photo to share	JPG, converted from HEIC	Compatibility
Short animation	MP4 video or animated WebP	Far smaller than GIF
Print shop file	TIFF or high quality JPG, as requested	Print workflows expect it
Favicon	ICO plus PNG package	Browsers and devices need several sizes

Which formats are safe on social platforms

The honest answer is that JPG and PNG are safe everywhere, and almost everything else depends on the platform and the day. Support for WebP, HEIC and AVIF uploads varies between networks, changes without much announcement, and sometimes works in one part of a platform and not another. Some scheduling tools quietly convert unsupported formats to JPG before posting, which is helpful until you wonder why your image looks softer than the file you uploaded.

The practical rule is simple. For social posts, export JPG for photos and PNG for graphics with text or transparency. Check each platform's current guidance before a big launch, since limits on file size and dimensions change. Commonly used sizes include 400 by 400 pixels for a LinkedIn profile photo, 1584 by 396 for a LinkedIn banner, and 1080 by 1350 for an Instagram portrait post, and the Image Resizer has presets for LinkedIn, Instagram, Twitter, YouTube and Facebook so you do not have to remember them.

How to keep files small without ruining quality

Format is one lever. These habits matter just as much.

Resize first. A 6000 pixel wide photo displayed at 1200 pixels is carrying four times more width than it will ever show. Resizing to the real display size usually saves more than any format change.

Then compress. For JPG, a quality setting around 80 to 85 is a good starting point. Our JPG Compressor has a quality slider so you can judge by eye. There are matching compressors for PNG, WebP and GIF.

Then choose the format. Move photos to WebP or AVIF for your own site, keep PNG only where transparency or sharp text needs it.

Keep a master. Store one full size original and export everything else from it. Resizing a small copy up, or recompressing an already compressed copy, is how quality quietly disappears.

Do it in one pass. If you repeat the same steps weekly, the Image Workbench chains resize, crop, rotate, compress and convert in a single pipeline, which turns a ten minute chore into a single run.

A common rule of thumb for web pages is to keep individual images well under 500 KB, and far smaller for anything that appears on every page. That is a guideline rather than a law, and the right number depends on your audience and their connections.

Seven mistakes that cost quality or time

1. Converting JPG to PNG to fix quality. It cannot restore what was lost. You get a bigger file with the same flaws.

2. Saving the same JPG over and over. Each save discards a little more detail. Keep the original and export copies.

3. Using PNG for photos on the web. It works, but it makes pages slow. A photo that is a few hundred kilobytes as JPG or WebP can be several megabytes as PNG.

4. Uploading HEIC to a website. Many systems reject it, and those that accept it may not display it. Convert first.

5. Using GIF for long clips. A ten second GIF can be enormous. Short MP4 video is smaller and looks better.

6. Trusting SVG files from unknown sources. Because SVG can carry scripts, treat files from strangers with the same care you would treat any code.

7. Compressing before resizing. You waste effort compressing pixels you are about to throw away. Resize first, compress second.

How to convert image formats for free

You will convert files far more often than you expect, because formats keep getting in the way. Trndinn's free Image Tools include 33 converters, plus compressors, a resizer, a cropper and more, 49 tools in total. They run in your browser, nothing is uploaded, and there is no signup and no watermark.

The conversions people reach for most:

• iPhone photo will not open: HEIC to JPG or HEIC to PNG
• Downloaded WebP will not upload: WebP to JPG or WebP to PNG
• Make website photos lighter: JPG to WebP, PNG to WebP or JPG to AVIF
• Logo needs to work on a platform that rejects SVG: SVG to PNG
• Shrink a heavy PNG: PNG to JPG when you do not need transparency
• Bring AVIF into an app that does not support it: AVIF to JPG or AVIF to PNG
• Need a transparent cutout: the Background Remover outputs an image with the background removed, and PNG is the format to keep it in If you want the full toolkit in one place, including audio, video, captions and bios, our guide to 50 plus free online tools maps all 59, and the free tools hub has every one of them.

Which format problem costs you the most time right now, an iPhone photo that will not open, a logo that blurs, or a site that loads too slowly?