Why won't my computer open a WebP file?

Because WebP is a web format, and support outside the browser is patchy. Every current browser renders it, but many desktop photo viewers, older editors, print services and upload forms still reject it. Converting to JPG removes the problem entirely.

Why is the JPG bigger than the WebP?

Because WebP compresses better than JPG. On the fixed test image here, a 247 KB WebP became a 339 KB JPG — about 38% larger. That is not a failed conversion; it is the size cost of moving to an older, universally supported format.

Does converting lose quality?

A little. Both formats are lossy, so decoding the WebP and re-encoding as JPG discards a small amount more detail. At the default quality of 82 the difference is invisible at normal viewing sizes.

What happens if the WebP has a transparent background?

The transparency is lost. JPG has no alpha channel, so transparent areas are filled with white. If you need to keep transparency, convert to PNG instead.

Is my image uploaded?

No. Both decoding and encoding happen in this browser tab. The Uploaded readout beside the result measures the page's own outbound network traffic, so a successful conversion reads 0 B.

Can I convert many WebP files at once?

Yes. Add as many as you like in one go — there is no upload, so no queue and no per-file limit.

Is there a file size limit?

None imposed. Your device's memory is the only real ceiling.

Should I convert to JPG or PNG?

JPG for photographs and for anything where file size matters. PNG when the image contains text or sharp graphics, or when you need to keep a transparent background — at the cost of a much larger file.

Will there be a watermark?

No. Nothing is added to the image and there is no paid tier.

Why did a website give me a WebP in the first place?

Because WebP is smaller, so sites serve it to save bandwidth. Right-clicking and saving an image from a modern web page often produces a WebP even when the original upload was a JPG.

Convert WebP to JPG

For the software that still refuses WebP. Converted on your own machine — nothing is uploaded.

ReadyWEBP → JPG

Uploaded0 B

What next

How do I convert WebP to JPG?

To convert a WebP to JPG, drop the file onto this page and download the JPG it returns. The conversion runs in your browser and nothing is uploaded. Expect the JPG to be larger than the WebP, not smaller — on our test image a 247 KB WebP became a 339 KB JPG. You are converting for compatibility, not size.

How to do it

Open the converter. Open this page in any modern browser. Nothing to install, no account needed.
Add your WebP files. Drag them onto the panel or click to choose. Batch conversion is fine — there is no upload and therefore no queue.
Choose a quality. 82 is the default. Raise it toward 95 if the image will be printed, lower it to squeeze under an upload limit.
Download the JPG. Every current photo viewer, editor, printer and upload form accepts the result.

At a glance

Converts	WebP to JPG
Transparency	Not supported by JPG — transparent areas become white
Compression	Lossy — quality is adjustable, default 82
Where it runs	In this browser tab. The file is not uploaded
File size limit	None imposed — your device memory is the ceiling
Cost	Free
Account needed	No
Watermark	None
Works offline	Usually after first use, but not guaranteed — there is no offline app

What it actually produces

Measured, not estimated. A procedurally generated 2400×1600 (3.8 MP) test image built to carry photographic entropy: value noise across nine octaves down to near-pixel scale, a dense field of small high-contrast features, a smooth gradient, hard edges and light grain. It is not a photograph — it is reproducible, which a photograph is not. Each figure below comes from running that image through this page.

Input	Output	Change
247 KB	339 KB	38% larger

Your own files will differ — a photograph, a screenshot and a diagram compress very differently. The point of a fixed image is that the formats can be compared with each other, not that your result will match.

Why won’t anything open my WebP file?

WebP is designed for the web, and outside the browser its support is uneven. Every current browser renders it perfectly — which is why a site handed you one — but plenty of desktop photo viewers, older image editors, print services and upload forms still refuse it.

That mismatch is why this page exists. JPG is the one image format that essentially every piece of software written in the last thirty years can open.

Expect a larger file, not a smaller one

This is the part that surprises people. On the fixed test image used for every measurement here, a 247 KB WebP became a 339 KB JPG — about 38% larger.

Nothing went wrong. WebP simply compresses more efficiently than JPG, so storing the same picture in the older format costs more space. You are trading bytes for compatibility, deliberately.

If size is what you care about and compatibility is not, converting to AVIF goes the other way: the same file came out at 104 KB.

What about transparency?

If your WebP has a transparent background, converting to JPG will fill it with white. JPG has no alpha channel and never has.

Convert to PNG instead when transparency matters. The file will be substantially larger — around eleven times larger on our test image — but nothing is lost.

Which quality setting?

General sharing and email — the default of 82.
Printing or further editing — 95 or above.
Fitting under an upload cap — lower it toward 60 and watch the size readout.

Each adjustment re-encodes from your original file rather than from the last result, so moving the slider repeatedly does not compound the loss.

Questions

Why won't my computer open a WebP file?: Because WebP is a web format, and support outside the browser is patchy. Every current browser renders it, but many desktop photo viewers, older editors, print services and upload forms still reject it. Converting to JPG removes the problem entirely.
Why is the JPG bigger than the WebP?: Because WebP compresses better than JPG. On the fixed test image here, a 247 KB WebP became a 339 KB JPG — about 38% larger. That is not a failed conversion; it is the size cost of moving to an older, universally supported format.
Does converting lose quality?: A little. Both formats are lossy, so decoding the WebP and re-encoding as JPG discards a small amount more detail. At the default quality of 82 the difference is invisible at normal viewing sizes.
What happens if the WebP has a transparent background?: The transparency is lost. JPG has no alpha channel, so transparent areas are filled with white. If you need to keep transparency, convert to PNG instead.
Is my image uploaded?: No. Both decoding and encoding happen in this browser tab. The Uploaded readout beside the result measures the page's own outbound network traffic, so a successful conversion reads 0 B.
Can I convert many WebP files at once?: Yes. Add as many as you like in one go — there is no upload, so no queue and no per-file limit.
Is there a file size limit?: None imposed. Your device's memory is the only real ceiling.
Should I convert to JPG or PNG?: JPG for photographs and for anything where file size matters. PNG when the image contains text or sharp graphics, or when you need to keep a transparent background — at the cost of a much larger file.
Will there be a watermark?: No. Nothing is added to the image and there is no paid tier.
Why did a website give me a WebP in the first place?: Because WebP is smaller, so sites serve it to save bandwidth. Right-clicking and saving an image from a modern web page often produces a WebP even when the original upload was a JPG.

About these formats

Sources

WebP — an image format for the web — Google
ITU-T T.81 — the JPEG specification — ITU-T
MozJPEG, the JPEG encoder used here — Mozilla