WebP Converter topic guide

JPEG vs PNG vs WebP: which format should you use

Direct answer

Pick by content and destination, not by which format is newest. Use JPEG for photographs that leave the web - email, print, marketplace uploads that reject WebP. Use PNG for graphics, screenshots, line art and any image that needs a transparent background with maximum compatibility. Use WebP for web delivery when you want a smaller file at the same visual quality: Google's WebP documentation reports that lossy WebP images are 25 to 34 percent smaller than comparable JPEGs, and every modern browser since Safari 14 reads WebP. Keep a JPEG or PNG fallback for destinations that do not accept WebP.

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What this workflow handles

The three formats solve different problems. JPEG is lossy and has no alpha channel, so it is the right choice for continuous-tone photographs where a small loss is invisible and every tool and destination accepts the file. PNG is lossless and carries an alpha channel, so it is the right choice for sharp-edged graphics, UI screenshots, logos and anything that must overlay another background without a solid box. WebP covers both cases for the web: lossy WebP replaces JPEG for photos, and lossless or lossy-with-alpha WebP can replace PNG when the destination is a website and the smaller payload matters. The catch is destination compatibility - most email clients, print pipelines and some marketplace upload forms still ask for JPEG or PNG and reject WebP. The Google Developers WebP page, the MDN image file type guide, the web.dev modern-formats guide and the MDN WebP compatibility table (Safari 14 and later) are the first-party references that back the comparison. For the pairwise decisions see the WebP vs JPEG, JPEG vs PNG and Transparent image format guides on this site, and the Image format guide for the broader overview.

Use the webp converter to convert a single image to WebP at the original pixel dimensions, then compare the byte counts in the result panel before keeping the output.

How to use it

  1. Decide what the image is (photograph, graphic, screenshot, logo) and where it will live (website, email, print, marketplace).
  2. If it is a photograph for email, print or a marketplace that rejects WebP, save or convert it as JPEG.
  3. If it is a graphic, screenshot or anything that needs transparency with maximum compatibility, save or convert it as PNG.
  4. If the destination is a website, run the source through the WebP Converter and compare the WebP byte count to the JPEG or PNG - keep WebP only when it is actually smaller.
  5. For web pages, serve WebP in a <picture> element with a JPEG or PNG fallback so older clients and non-browser tools still work.

Frequently asked questions

JPEG vs PNG vs WebP - which should I pick?

Match the format to the content and where the file will live. Photographs for email, print or a marketplace upload: JPEG. Graphics, screenshots, logos or anything with transparency that must work everywhere: PNG. The same image for a website where file size matters: WebP, with a JPEG or PNG fallback for old clients and non-web destinations. Google's WebP documentation, MDN's image file type guide and web.dev's modern-formats guide are the canonical sources for that split.

Is WebP always better than JPEG and PNG?

No. For web delivery WebP is usually smaller at the same visual quality - Google reports lossy WebP is 25 to 34 percent smaller than comparable JPEG - and web.dev recommends WebP alongside AVIF for performance work. For email, print and destinations that reject WebP, JPEG or PNG remains the safer default because it is accepted without a fallback. Always compare the actual byte counts before keeping a converted file.

Which format supports transparency?

PNG and WebP do; JPEG does not. JPEG cannot carry an alpha channel at all, so a transparent source saved as JPEG is composited onto a solid background before the file is written. MDN's image file type guide lists transparency as a capability of PNG and WebP, not JPEG. Use PNG when you need lossless transparency with maximum compatibility; use WebP with alpha for a smaller transparent file on the web. The Transparent image format guide on this site covers the alpha decision in more detail.

When should I still use JPEG?

Use JPEG when the destination is email, photo printing, a desktop publishing tool, or a marketplace upload form that rejects WebP. JPEG works in every image tool and every major email client, so it is the lower-compatibility-risk choice off the web. For photographs on a website, prefer WebP and keep a JPEG fallback via a <picture> element, as the WHATWG HTML Living Standard describes.

When should I still use PNG?

Use PNG for graphics with sharp edges - logos, icons, UI screenshots, line art and text - and for any transparent image that must open in email, print or older tools. PNG is lossless and carries an alpha channel, which JPEG cannot. On the web, a WebP version of the same graphic is often smaller; keep the PNG as the compatibility fallback. The JPEG vs PNG guide on this site covers the two-format decision without WebP.

Do all browsers support WebP?

Every modern major browser does: Chrome, Firefox, Edge, Safari (since version 14, released September 2020) and Opera. The MDN WebP compatibility table is the canonical reference. For older Safari or locked-down corporate clients, ship WebP inside a <picture> element with a JPEG or PNG <source> as fallback so the browser picks the first format it supports.

Can I use WebP for email or marketplace uploads?

Generally no. Most email clients (Gmail, Outlook desktop, Apple Mail) and many marketplace upload forms still ask for JPEG or PNG and do not accept WebP reliably. web.dev's modern-formats guide recommends WebP for web performance work specifically. Convert to WebP for the website; keep JPEG or PNG for email, print and uploads that name those formats.

Sources

Explore the webp converter topic cluster

Each guide answers a different format-decision question. Pick the one that matches your situation, then use the linked tool to produce the output you need.

Related guides

  • WebP vs JPEG: when to use each

    WebP is usually 25 to 35 percent smaller than JPEG at the same visual quality, and every modern browser reads it. JPEG is still the right choice for email, photo printing and any destination that explicitly asks for it. A practical decision guide with sources from Google, Mozilla and web.dev.

  • AVIF vs WebP: which modern format should you use

    AVIF compresses better than WebP for photographs and high-detail images, but WebP encodes faster and has slightly wider tooling support. Both are recommended by web.dev for web performance. A practical comparison with browser compatibility data from MDN and Google Developers.

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