JPG to WebP Converter

What this tool is used for

• Shrinking existing JPEG photos for a page where transfer size is the constraint.
• Producing a modern format alongside the JPEG for a responsive picture element.
• Reducing the weight of a gallery without re-shooting or resizing anything.
• Converting a batch of product photos to one efficient format.
• Comparing size at matched visual quality before committing to a migration.

Frequently Asked Questions

Does converting an existing JPEG improve quality?

No — the JPEG's losses are already permanent. WebP re-encodes those exact pixels, so you gain file size and nothing else. This is double compression, and pushing quality too low compounds artefacts from both passes.

What quality setting should I use?

75-85 for photographs. Going below the SOURCE JPEG's original quality wastes detail; going above it inflates the file without recovering anything, because the information is already gone.

Is EXIF preserved?

Often not — many converters drop it, which is usually welcome since JPEGs from phones carry GPS coordinates. If you need the capture date or copyright retained, verify explicitly rather than assuming.

Should I keep the original JPEG?

Yes, as the master. WebP is a delivery format, and re-encoding from the WebP later adds a third generation of loss. Keeping the highest-quality original is what makes future re-encoding safe.

When is the conversion not worth it?

For very small images, where WebP's container overhead can make it LARGER than the JPEG, and for anything that must open in older desktop software. Always compare the output size rather than assuming a saving.

How much smaller is WebP in practice?

Commonly 25-35% at visually equivalent quality for photographs, less for images already heavily compressed. The saving comes from better prediction and entropy coding, not from discarding more detail.

Should lossy or lossless WebP be used?

Lossy for photographs, lossless for graphics with flat colour and sharp edges. Encoding a screenshot as lossy WebP reintroduces exactly the artefacts PNG was avoiding.

What about AVIF?

Usually smaller again at the same quality, with slower encoding and slightly narrower support. Serving both through a `<picture>` element with WebP as the fallback is the common arrangement.

Common errors and gotchas

• Expecting a lossless improvement. The JPEG's artefacts are already present and get re-encoded.
• Using a high quality setting that erases the size advantage entirely.
• Converting and deleting the JPEG, leaving no fallback for clients that cannot render WebP.
• Assuming EXIF and colour profile carry over, since converters vary in what they preserve.
• Judging quality on a scaled-down preview rather than at the size the image will actually display.