JPG, PNG, WEBP, AVIF, GIF or SVG: which image format to choose

JPG is the classic photo format: it compresses with loss, cutting file size a lot by discarding detail the eye barely notices. It doesn't support transparency. Saving a JPG, editing it, and saving it as JPG again repeatedly accumulates quality loss with each save, because every save re-compresses it. Converting a JPG to PNG doesn't recover detail already lost during the first compression: PNG just losslessly packages whatever pixels it receives, it can't reconstruct what's already gone. It's still a practical choice when file size matters more than perfect compression, like photos meant to be shared or uploaded to the web.

Compress a JPG image

PNG compresses losslessly for its typical uses: what goes in is exactly what comes out, pixel by pixel. It supports real transparency via an alpha channel, making it the natural choice for rasterized logos, screenshots, interfaces and graphics with sharp edges. That same lack of loss means a photo saved as PNG tends to be heavier than the same image as JPG or WEBP. Converting an image with a solid background to PNG doesn't remove the background automatically: PNG only allows transparency if the file already has it, or if it's added explicitly with an editing tool.

Compress a PNG image

Remove an image's background

WEBP is a format built for the web that supports both lossy and lossless compression, plus transparency. As a format, WEBP supports animation (it's a modern alternative to GIF), though that's a general capability of the format: it doesn't mean there's a tool here to create animated WEBP files from another file. Modern browsers handle it well, but you can't assume any older program or device will open it without issues.

Convert JPG to WEBP

Convert WEBP to JPG

AVIF is a newer format, especially efficient for photographic images: it can often achieve a smaller size than JPG or WEBP at comparable visual quality, though that depends on the specific image and isn't a universal guarantee. The format supports transparency depending on how the file is encoded. Its compatibility is more limited than JPG's or PNG's, and encoding or decoding AVIF demands more computing power than those older formats.

Convert AVIF to PNG

GIF enables simple animation by playing back a sequence of images, but its palette is limited to 256 colors, which often makes it a poor choice for photos with lots of tones. Its transparency is binary: a pixel is either opaque or fully transparent, without the semi-transparency PNG or WEBP offer. An animated GIF isn't the same as a video: it's a fixed sequence of images, with no audio track and none of a real video format's efficient compression, which is why a short video usually weighs less than its GIF equivalent. On QuickToolio, GIF-related tools (creating one from a video, or compressing an existing one) live in the video and audio category, not the image one.

SVG is a vector format: instead of a grid of pixels, it describes shapes through code, so a vector design can scale to any size without pixelating. An SVG file can also embed raster images inside it; in that case, that specific part does pixelate when enlarged, just like any pixel image. It's the natural choice for logos, icons and illustrations with defined shapes, but it isn't a substitute for a photograph: a photographic image can't practically be represented as vector shapes. Also, how an SVG renders can vary slightly between programs if it uses advanced features. Converting an SVG to JPG or PNG rasterizes the result: it stops being vector-based and gets a fixed resolution, like any pixel image.

Convert SVG to PNG

• Changing format: turns the file from one format into another (say, PNG to WEBP), but doesn't improve the image on its own.
• Reducing file size (compressing): keeps the same format and dimensions, shrinking the file size.
• Changing dimensions (resizing): changes how many pixels the image has, not how much each pixel weighs.
• Increasing resolution: an AI model reconstructs plausible detail, but doesn't automatically recover original information that was never in the image.
• Removing the background or adding transparency: requires a specific tool; it doesn't happen just by changing format.
• Cropping: keeps only part of the frame, without touching compression or format.

Just changing a file's extension (renaming .jpg to .png, for example) doesn't convert it: the internal content stays encoded as before and likely won't open correctly. "Lossless" doesn't mean "always a small file" either: a lossless PNG of a complex photo can end up heavier than a JPG with some loss. A target-size tool, like one that shrinks an image to a specific weight, combines compression (and sometimes dimension) adjustments to approach the size you ask for, depending on how it's implemented.

Resize an image

Shrink an image to a specific size

• A photo to upload to the web: JPG or WEBP, prioritizing a reasonable size over perfection.
• A logo with a transparent background: PNG or WEBP with an alpha channel.
• A screenshot: PNG, so text and edges stay sharp.
• A short animation: GIF for maximum compatibility, animated WEBP if the destination supports it.
• A file you'll keep editing: PNG, to avoid quality loss across intermediate saves.
• Broad compatibility with any program or device: JPG or PNG.
• You need the file as light as possible: WEBP or AVIF, if the end use supports them.
• Graphics that must look sharp at any size: SVG, if it's a vector design (not a photograph).

QuickToolio converts between JPG, PNG and WEBP in any direction, and can also convert from AVIF, HEIC (iPhone photos) and SVG to JPG or PNG, though not the other way around: there's no tool here to create a new AVIF or SVG file from another format. Besides format conversions, there are AI-powered tools to remove an image's background, increase its resolution, or shrink it to a specific file size, all running in the browser without uploading the image to a server. All the processing depends on your own device's memory and power, so very large images or several operations in a row can take longer on modest hardware.

Increase an image's resolution

Create a transparent PNG