JPEG, PNG, WebP or AVIF: how to choose an image format
Note: This guide is general information. Check the format requirements of the website, application or service that will receive the image.
The right image format depends on what the image contains and where you will use it. A photograph, a screenshot with small text and a logo with a transparent background have different needs. Converting a file does not restore detail that was already lost.
Choose by image type and destination
JPEG (also written JPG) uses lossy compression and is widely supported. It is often suitable for photographs when a smaller file matters, but it does not preserve transparency. Repeated lossy exports can reduce image quality, so keep the original when possible.
PNG uses lossless compression and supports transparency. It is a practical choice for screenshots, interface captures, line art and graphics with sharp edges or text. A photograph saved as PNG may take more space than a lossy export, depending on the image.
WebP and AVIF can use lossy or lossless compression and support transparency. They are useful for web delivery, but the best result depends on the source, encoder settings and the software that must open the file. Check compatibility with the destination before choosing.
What conversion can and cannot change
Converting a JPEG to PNG does not recover details removed by JPEG compression; it can only store the current appearance in another format. Converting a transparent PNG or WebP to JPEG removes transparency, usually by filling transparent pixels with a background color.
A lossy export trades some image information for a smaller file. The visible effect varies with the image and settings. There is no single quality value or size reduction that works for every photo, screenshot or logo. Compare the output at its intended display size.
A practical workflow
- Keep a copy of the original file before editing or converting it.
- Use a lossless format when preserving crisp text, fine edges or transparency matters; use JPEG, WebP or AVIF lossy mode for photographs when the destination accepts it.
- Check dimensions, transparency, colors and text after conversion. Open the result in the application or platform where it will be used.
- If a website needs broad compatibility, ask whether it supports WebP or AVIF; site owners can provide a fallback with the HTML picture element.
- Image format converter (Portuguese) — Converts supported images to PNG, JPEG or WebP and lets you choose output quality.
- Image compressor (Portuguese) — Review the output dimensions and quality after compression.
Continue with image tools
Choose a tool after checking the required format and quality. ConverteArq tools.
Frequently asked questions
Does converting JPEG to PNG improve image quality?
No. It cannot restore information already lost in a JPEG export. Keep the original if you need to edit or export again.
Which format supports a transparent background?
PNG, WebP and AVIF can support transparency. JPEG does not; check that the application and destination preserve the alpha channel.
Is WebP or AVIF always smaller?
No format is guaranteed to produce the smallest file for every image and setting. Compare the output and verify that the destination supports the format.
Which format should I use for a screenshot with text?
PNG is often a good starting point because it uses lossless compression. WebP or AVIF lossless modes may also work; inspect small text and edges after conversion.