JPG to WebP converter
Drop in JPG pictures, choose a quality and download smaller WebP files for your website. The conversion happens in your browser.
Free · no signup Runs in your browser
How do I convert a JPG to a WebP?
Add your JPG files, choose a quality (80 to 90 is a common range) and download the WebP versions. Google reports that lossy WebP images are 25-34% smaller than comparable JPEGs at equivalent quality, so a website that serves WebP loads faster. Your browser must be able to save WebP: Chrome, Edge and Firefox can.
Why convert JPG to WebP
Page speed depends heavily on picture weight, and WebP is the easiest way to cut it. Converting the JPG pictures on a site to WebP typically makes them smaller without a visible change, which helps pages load quickly on mobile connections.
Keep your JPG originals. WebP is lossy at the settings used here, so converting back to JPG later would lose a little more detail. Serve the WebP on your site and archive the JPG.
It runs in your browser. Your pictures are never uploaded, and there is no account to make.
How the conversion works in detail
Your browser does the work. When you add a JPG file, the page reads it with the browser's File API (the file is not uploaded), asks the browser to decode it into raw pixels, and draws those pixels on a canvas of the same size. The canvas is then saved as WebP with the browser's own encoder, and the result is offered as a download. A JPG file is the most common photo format: it stores each picture as a compressed, lossy approximation of the original, with no transparency; a WebP file is a format developed by Google that can be lossy or lossless and supports transparency and animation. The quality slider sets how much detail is traded for a smaller file; transparent areas are kept. Everything is processed one picture at a time, in your browser's memory, which is why several pictures at once work well but pictures over about 100 megapixels are refused.
How to convert, step by step
- Add your JPG files: drop them on the box, press the box to choose them, or paste a picture.
- Choose the quality if the options show one (lossy formats only).
- Wait a moment: each picture shows its new size and how much smaller or larger the file became.
- Press Download next to one picture, or Download all to save every converted file in turn.
- Open a converted file to check it before you delete the original JPG file.
What changes in the conversion
What stays the same and what does not when JPG becomes WebP.
| Aspect | What happens |
|---|---|
| Pixels and size in pixels | Kept exactly: the width and height do not change |
| File size | Usually smaller, which is the point of the change |
| Quality | A small loss: WebP is lossy, so each conversion discards a little detail. Keep the original |
| Transparency | Not applicable: JPG has no transparency |
| Animation | Not applicable: JPG is a single picture |
| Camera details, date and GPS location | Removed. A canvas holds only pixels, so the new file carries none of the original's metadata, which also helps privacy |
| Orientation | Applied: a photo that was rotated by a camera setting is turned upright in the new file |
| Colours | Converted to the standard sRGB range. Pictures with a wider colour range (some AVIF, HEIC and WebP files) may look a touch less saturated |
When to use it
- Preparing pictures for a website or online shop
- Reducing the weight of a gallery page
- Meeting a page-speed audit that recommends modern image formats
- Making smaller files to send or store
Problems you may run into
Most problems come from the formats involved, not from the tool.
| What you see | Likely cause | What to do |
|---|---|---|
| A JPG file will not open or shows an error | The file is damaged, is not really JPG (it was only renamed), or your browser cannot decode it | Open the file in another program to check it, or try Chrome, Edge or Firefox |
| The result looks softer or has fuzzy edges | WebP is lossy, and text or sharp lines show compression most | Raise the quality to 95 to 100, or use PNG for screenshots and text |
| Colours look a little different | The picture was converted to the standard sRGB range | Compare at full size; for colour-critical work convert in a colour-managed editor |
| The camera date or GPS location is gone | Metadata is not copied, by design | Keep the original if you need it, or write the details in the file name |
| 'Too large to process' | The picture is above about 100 megapixels | Reduce it first with the image resizer |
| Several downloads are blocked | The browser asks before saving many files at once | Allow multiple downloads for this site, or download the pictures one by one |
Mistakes it helps you avoid
- Setting quality too low and seeing blurred edges.
- Deleting the JPG original once the WebP exists.
- Using the WebP somewhere that cannot open it, such as older software.
- Expecting a gain on pictures that are already heavily compressed.
How the conversion works
Four steps, all inside your browser.
1. The file you choose is read by your browser. It is not sent to a server.2. The picture is decoded to pixels and drawn on a canvas the same size as the original.3. The browser's encoder saves the canvas in the new format, at the quality you set for JPG and WebP.4. The new file is offered as a download. Metadata such as camera details and location is not carried over.
Browsers decode the picture to pixels and re-encode a canvas with the format and quality you choose (MDN: HTMLCanvasElement.toBlob). Because the picture is redrawn, camera details and location data are not copied to the new file, and an animated picture keeps only its first frame. Very large pictures (over about 100 megapixels) are refused, since many phones cannot hold them in memory.
Example: hero.jpg to hero.webp
You have hero.jpg and need a WebP file.
- You choosehero.jpg
- You gethero.webp
- SettingQuality 80
The WebP is usually smaller than the JPG at a similar appearance.
Sizes depend on the picture, so this tool shows the before and after size for each file instead of promising a percentage.
Terms on this page
- Lossy
- A format that discards some detail to make the file smaller, such as JPG.
- Lossless
- A format that stores the pixels without losing detail, such as PNG.
Common questions
How much smaller is WebP?
Google reports lossy WebP images are 25-34% smaller than comparable JPEGs at equivalent quality. The saving on your own pictures depends on the picture.
Which browsers can save WebP?
Chrome, Edge and Firefox can. If your browser cannot, the tool tells you instead of giving a wrong file.
Can every device open WebP?
Current browsers show it, but some older programs and print services do not, so keep the JPG for those.
Is anything uploaded?
No. The conversion runs in your browser on your own device.
What quality should I use?
Try 80 first and compare it with the original. Raise it if you see blur or blocks.
Where these numbers come from
- MDN Web Docs — HTMLCanvasElement.toBlob() How a browser encodes a canvas as PNG, JPEG or WebP, and what the quality argument does.
- MDN Web Docs — Using files from web applications How a page reads a file you choose without uploading it.
- MDN Web Docs — Image file type and format guide Which formats are lossy or lossless, which support transparency, and where they are best used.
- Google for Developers — WebP WebP lossless images are 26% smaller than PNGs and lossy WebP images 25-34% smaller than comparable JPEGs.
Last verified 2026-10-25 The method on this page is checked against the sources above at least once a year. Spotted something out of date? Tell us and we will fix it.
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