JPG to WebP Converter
Convert JPG images to WebP and choose the quality. The size before and after is shown for each file.
Drag & Drop files here
or click to select files
Best under 50MB / 50 files
Related Image Tools
This JPG to WebP converter works as a compressor: it re-saves a JPG photo as a WebP file at the quality you choose, and shows the size before and after so you can see what you gained. WebP is the format most websites now use for photographs because it reaches the same look in fewer bytes. Add one picture or a whole folder, press Convert, and download the results. The files are processed on your device.
How to Convert JPG to WebP
- Add the JPG files. Drop them on the upload box or click to browse. Both .jpg and .jpeg are accepted.
- Set the quality and press Convert. The slider starts at 75%. Under each result you will see the old size, the new size and the difference.
- Adjust if you need to. Move the slider and press Convert again. The same files are converted with the new setting.
- Download. Save single files, or use Download All for a ZIP.
File Size at Each Quality Setting
We converted two real photographs with this tool. One was a small web photo of 44 KB (550 × 368 pixels) and the other a large one of 951 KB (3000 × 2000 pixels).
| Quality | Small photo (44 KB JPG) | Large photo (951 KB JPG) |
|---|---|---|
| 60% | 27 KB (39% smaller) | 644 KB (32% smaller) |
| 75% | 32 KB (27% smaller) | 759 KB (20% smaller) |
| 80% | 38 KB (13% smaller) | 913 KB (4% smaller) |
| 90% | 57 KB (31% larger) | 1.32 MB (42% larger) |
| 100% | 249 KB (5.7 times larger) | 5.90 MB (6.4 times larger) |
Your own pictures will give different figures, but the shape is the same: the saving comes at 80% and below.
Why a High Setting Makes the File Bigger
A JPG is not a clean picture. It was compressed when it was saved, and that left faint blocks and ripples around edges. When you ask for a WebP at 90% or more, the encoder treats those marks as detail and spends data keeping them. The result is a larger file that looks no better. A lower setting lets the encoder smooth them away, which is where the saving comes from. If you still have the original from the camera or the editor, convert that and not a JPG that has already been shrunk.
When to Keep the JPG
WebP is for web pages. For email attachments, printing services and older programs, JPG is still the safer file to send, so keep your originals. If the picture you want to shrink is a PNG with a transparent background, use the PNG to WebP Converter, which keeps the transparency. To go back the other way, there is a WebP to JPG Converter.
Frequently Asked Questions
How much smaller is a WebP than a JPG?
It depends on the quality setting. In our tests the WebP was 20% to 27% smaller at 75% and 32% to 39% smaller at 60%. At 90% it was larger than the JPG.
Why did my WebP come out larger than the JPG?
The quality is set too high. A JPG has already been compressed once, and a high setting spends data on copying its flaws exactly. Lower the slider to 75% or less and convert again.
What quality should I use?
Start at 75%, which is where the slider begins. Look at the result at full size. If it looks the same as the JPG, try 60% for a smaller file.
Does 100% give the best picture?
It gives the largest file, about six times the size of the JPG in our tests, with no visible gain. The JPG has already lost its fine detail and 100% cannot return it.
Do all browsers show WebP?
Every current version of Chrome, Edge, Firefox and Safari does. Some older desktop programs and email clients do not, so keep the JPG as well.
Are my photos uploaded?
No. The conversion runs in your browser and the files stay on your device.