Make WebP versions of JPEG photographs for a website or app that accepts the format. Convert locally, check the resulting size and appearance, and keep the JPEG originals. A format change is useful only when the destination supports the output.
Check the complete destination workflow
Do more than check whether a browser can display WebP. Your content editor, media library, upload form and any later export process also need to accept the file. Try one converted image through that workflow before converting a large collection. A successful download here cannot guarantee acceptance by another service.
This page creates WebP files from still JPEG inputs. It does not change your website's image references or deploy the files. After uploading a converted picture to a website, make sure the page actually uses the new file and displays it correctly at desktop and mobile sizes.
Example: compare a listing photograph
You have a 1600 by 1200 JPEG of a wooden table for a listing. Create a WebP copy and compare the actual size with the original. Look closely at the wood grain, the table's edges and any label visible in the photograph. Then view it at the smaller size used by the listing card.
If the result is smaller and looks acceptable in context, it may suit that use. If it is larger, visibly degraded or rejected by the listing editor, keep the JPEG or try another setting. Do not assume the new extension automatically provides a better result for every picture.
Conversion, compression and resizing are different
Conversion changes the encoded format. Resizing changes the pixel dimensions. Compression works toward a file size or quality tradeoff. A 5000 pixel wide photograph may still contain far more pixels than a small web card needs, even after it becomes WebP. Consider the actual display requirement before deciding which operation to use.
For a strict target such as 100 KB, use the image compressor and read its achieved status. This converter does not guarantee a byte limit, a percentage reduction or lossless results. Keep your source JPEG so each new attempt starts from the same original.
When export or upload fails
Only still JPG and JPEG inputs are supported here. PNG, WebP, SVG, GIF, HEIC, PDF and animated files need a different workflow. A file must also fit the decoded 24 megapixel limit, not merely the 25 MB file limit. Process one image first if a large batch is slow on your device.
The browser performs WebP encoding, so output size can differ between browsers. If export is unavailable or fails, try a current browser with WebP encoding support. If export succeeds but another site rejects it, check that site's accepted formats and size limits before attempting more conversions.
Each side is limited to 16,384 pixels. Outputs are limited to 25 MB per image and 150 MB per batch; ZIP bundles the files without recompression.
Frequently asked questions
Will WebP always be smaller than JPG?
No. Compare the actual results. Source content, existing compression and output encoding all affect file size. A JPEG that is already small may offer little benefit from another conversion.
Does this improve search rankings?
Changing an image format alone does not establish a search ranking outcome. Use a suitable image size and quality for the page, and evaluate the complete page experience after publishing.
Are my photos uploaded?
No image file data is uploaded for conversion. Processing happens locally in your browser, and downloads are new copies. Save the output before leaving the page.