How to Convert JPEG to WebP and Compress It Online

WebP is an image file format that can store photos at smaller file sizes than JPEG at similar visual quality, depending on the image and settings. An online JPEG to WebP compressor converts the file and applies compression in one pass. This guide covers what to prepare, which settings matter, how to check the result and how to fix the most common issues.

Before you start

Conversion re-encodes the image, so the result is a new file rather than a lossless copy of the original. Prepare the following before you upload anything:

• Keep an untouched copy of the original JPEG. You will need it if the result is too soft or you want to try different settings.
• Confirm that the place where the image will be used accepts WebP. Most current web browsers display it, but some upload forms, apps and older desktop software do not.
• Decide on the pixel dimensions you actually need. If the image will be shown at a smaller size, resizing usually saves more space than compression alone.
• Check the image for sensitive content and metadata. Camera files can carry EXIF data such as date, device and sometimes location.

Find out where the processing happens. Some online converters work entirely inside your browser, while others upload the file to a server. The page layout alone does not tell you which one you are using, so read the tool's privacy statement or documentation. Treat claims about automatic deletion or retention periods as statements from the provider, not something you can confirm yourself. If the information is missing or unclear, assume the file is uploaded and avoid using the tool for documents, ID scans or screenshots containing personal data.

Step-by-step instructions

Online tools use different labels and layouts, so the steps below describe the settings to look for rather than exact buttons or menus.

• Open the converter and confirm it accepts JPG or JPEG input and offers WebP as the output format. JPG and JPEG are the same format with different file extensions, so either works.
• Add your image or a batch of images. If the tool processes several files at once, check whether the settings apply to all of them or to each file separately.
• Choose the compression mode if the tool offers one. Lossy mode is the practical choice for photos and gives the smallest files. Lossless mode keeps the decoded JPEG pixels exactly, including any existing JPEG artifacts, and can produce a file larger than the original.
• Set the quality level. Higher values keep more detail and produce larger files. Start at a fairly high setting, then lower it step by step until you find the smallest file that still looks acceptable.
• Resize if needed. Enter the target width or height and keep the aspect ratio locked so the image is not stretched. Only scale down; enlarging a JPEG adds file size without adding detail.
• Review metadata options if they are available. Removing metadata reduces privacy risks and can save a little space, but see the orientation note in the next section.
• Run the conversion and download the WebP file. Give it a clear name and save it alongside the original rather than replacing it.

Some tools expose only a single compression slider or a few presets instead of separate lossy, lossless and quality controls. In that case, the preset names describe the trade-off between file size and quality, and the same approach applies: start with the higher-quality option and lower it only if the file is still too large.

Check the output

Do not rely on the download alone. Verify the file before you publish or share it:

• Format: confirm the file ends in .webp and that your file manager or image viewer identifies it as WebP. A renamed extension does not change the actual format.
• File size: compare it with the original JPEG. If the WebP file is not smaller, adjust the settings or keep the JPEG.
• Pixel dimensions and aspect ratio: check that the width and height match what you set and that the image is not stretched or cropped.
• Visual quality: view the image at 100 percent zoom. Look at smooth gradients such as skies for banding, fine textures such as hair or foliage for smearing, and text or sharp edges for blur or blocky artifacts.
• Orientation: if the photo appears rotated, the original probably relied on an EXIF orientation tag that the converter removed or ignored. Rotate the original and convert again, or choose a setting that keeps metadata.
• Color: if colors look slightly different, the tool may have dropped the embedded color profile. This is most noticeable on images edited in a wide color space.
• Transparency: JPEG does not support transparency, so the WebP output will have the same solid background. Converting the file does not create transparent areas.
• Destination: upload or open the file where it will actually be used and confirm it displays correctly there.

Common problems and next steps

The WebP file is larger than the JPEG. This usually means lossless mode was selected, the quality setting is very high, or the original JPEG was already heavily compressed. Switch to lossy mode, lower the quality gradually or reduce the pixel dimensions. If none of these help, the original JPEG may already be the better choice for that image.

The image looks blurry or blocky. Raise the quality setting and convert again from the original JPEG. Avoid converting a file that has already been compressed several times, because each lossy pass adds new artifacts on top of the old ones.

The site, app or form will not accept WebP. Some platforms only allow JPEG or PNG uploads. Use the original JPEG there, or compress it as a JPEG instead of changing the format.

The WebP file will not open on your computer. Older image viewers and editors may not support the format. Open it in a current web browser to confirm the file itself is valid, then update your software or use an app that supports WebP.

The tool rejects a file or a batch. Online compressors often set their own limits on file size, number of files or total upload size. Check the limits stated by the tool, then split the batch or resize very large images before converting.

You need a transparent background. Conversion alone cannot remove a background. Edit the image to remove the background first, then export it as WebP with transparency, or save it as PNG if the destination does not support WebP.

You prefer not to upload images. Look for an installed image editor or a command-line encoder that can export WebP, so files stay on your device. The same settings apply: choose lossy or lossless, set quality, resize if needed and check the result as described above.