Convert JPG images to WebP for smaller website images.
Quick answer
At a similar look, WebP files are typically smaller than JPG, which helps pages load faster, and WebP can also hold transparency. JPG opens in every program. Convert JPG to WebP for website images, convert from the original when you can, and keep the JPG for places that cannot open WebP.
| Format | Compression | Transparency | Best for | Support |
|---|---|---|---|---|
| JPG | Lossy | No | Photographs | Opens everywhere |
| WebP | Lossy or lossless | Yes | Images on websites | All current major browsers; some older software cannot open it |
These figures are computed with the same formulas as the JPG to WebP Converter above. Change the inputs in the tool to see your own result.
JPG to WebP converts JPG photos into WebP files, which are typically 25 to 35 percent smaller at similar visual quality. Smaller images make web pages load faster, and page speed matters for visitors and for search rankings. Add up to 30 JPG files, choose the WebP quality, convert in your browser and download the results singly or as a ZIP. Each result shows its size so you can see the saving straight away. Nothing is uploaded.
Made for everyone. Typical uses:
A 900 KB JPG photo converts to a WebP of roughly 600 to 700 KB at a similar look. Across a page with twenty photos that adds up to several megabytes saved, which is noticeable on mobile connections. Lowering the quality to 80 percent saves more with little visible change.
Both formats are lossy, so converting a JPG to WebP adds a small further loss; convert from the original when you can. Some older programs, print shops and upload forms do not accept WebP, so keep the JPG for those uses. Photos taken sideways on a phone come out upright, and animated content is not supported.
Accuracy: Conversions use well-known methods and are tested with real sample inputs. Check the output before you send or publish it.
Expert Tip
Resize first if the picture is larger than it will be displayed. A photo shown 800 pixels wide does not need 4,000 pixels, and resizing saves more than any format change.
Most photos on the web are JPG, and most of them could be about a quarter to a third smaller with no visible difference by using WebP. That matters because images are usually the heaviest part of a page: less data means a faster first view, lower data use for visitors and, for many sites, a better experience on phones. Page speed is one of the things search engines take into account, so lighter images also support your rankings.
WebP is supported by all current major browsers, including Chrome, Firefox, Safari and Edge, so the compatibility risk on the web is small.
Google reports that WebP files are typically 25 to 35 percent smaller than JPG at comparable quality. In practice a 900 KB JPG photo often becomes a WebP of 600 to 700 KB. That may not sound dramatic for one picture, but a gallery of thirty photos saves several megabytes, and lowering the quality to around 80 percent saves more again with little visible change.
The converter displays the size of every result, so you can see the saving and keep the JPG for any picture where the WebP is not smaller.
For photographs, start at 80 to 85 percent. That is usually indistinguishable from the original at normal viewing size, while cutting the size well below a typical JPG at 90 percent. Zoom into a detailed area such as hair, foliage or fine text to check. If you see blocky patches or smearing, raise the quality by five points and convert again.
Resizing has a bigger effect than the format. A 4,000-pixel photo displayed 800 pixels wide wastes most of its pixels, so resize first with the Image Resizer, then convert. The article how to compress images for a faster website describes the full workflow.
JPG is still the safest format for sharing and printing, because every device, app and print service accepts it. Keep the JPG when you send pictures to other people, upload to a form that lists JPG as the accepted type, or print. Use WebP for the copies that your own website serves. Both formats are lossy, so always convert from the original file, not from an already compressed copy, and keep the original.
If you publish the WebP files on a website, you can still support old software by offering both versions. An HTML picture element lists the WebP source first and falls back to the JPG in an ordinary img tag, so each visitor gets the best format their browser can show. Content management systems and image plugins often do this for you. Make sure the images keep descriptive alt text and explicit width and height attributes, which helps accessibility and prevents the page from jumping as images load.
For pictures with transparency, use PNG to WebP. To go back to a universal format, WebP to JPG does it. The Image Converter handles other formats, and the Image Compressor reduces size without changing format. For an overview of when each format fits, read JPG vs PNG vs WebP. Everything runs in your browser and nothing is uploaded. If you are moving a whole site, convert a few pictures first and compare page speed before and after, so you know the change is worth doing everywhere.
How much smaller WebP files typically are, how to convert PNG and JPG to WebP in bulk, what browsers support it, and how to keep a fallback for old software.
Explore more in Converters, read the guides and articles, or see how we test our tools.
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