JPG to WebP Converter
Smaller web images: JPG photos to WebP with live sizes, size targets and resizing.
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Use Actual pixels to inspect fine detail at 100% — both sides scroll together.
About the JPG to WebP Converter
Convert JPG photos to WebP to make web pages lighter. Each file shows its new size and the percentage saved as soon as it is converted, and updates live when you move the quality slider. Set a size limit such as “under 150 KB” and the converter finds the highest quality that fits; add a maximum width to scale large camera photos down for the web, or choose lossless WebP.
Photos are turned the right way up (EXIF orientation is applied) and camera metadata such as GPS location is removed. Chrome, Edge and Firefox encode WebP themselves; Safari cannot, so MySmartCoPilot uses Google’s libwebp compiled to WebAssembly there — the converter works the same everywhere, without uploading anything.
How to use it
- Drop JPG files onto the box or click Choose JPG photos — you can select many files at once.
- Move the Quality slider and watch the size and % saved of every file update.
- Optional: tick Fit under a file size (for upload limits), Limit the width (for websites), or Lossless.
- Compare the result with the original, then download each WebP or Download all as a ZIP.
Examples
12 camera JPGs · 4032 × 3024 · Quality 80 · Limit width to 1600 px
12 WebP files of 1600 × 1200 — typically a small fraction of the original size, ready to upload.
portrait.jpg · Fit under 100 KB
portrait.webp at the highest quality that is still ≤ 100 KB (the quality used is shown on the file).
If even the lowest quality is too big, allow smaller dimensions — or make sure the site accepts WebP; many forms still want JPG.
label.jpg · Quality 90
label.webp that keeps small text crisp while still being smaller than the JPG.
Common uses
- Speeding up websites, online shops and blogs (smaller images improve page load time).
- Meeting image size limits of CMSs, marketplaces and email newsletters.
- Preparing responsive images: one WebP per maximum width.
- Shrinking photo libraries for sharing without visible quality loss.
How much smaller is WebP than JPG?
Google’s compression study found lossy WebP files 25–34% smaller than JPEGs of equivalent quality (measured with the SSIM index) (WebP compression study). Your result depends on the photo and the settings, which is why every file shows its exact before and after size here. Photos that were already saved at low JPG quality shrink less, and occasionally a WebP comes out larger — the file is then marked so you can keep the JPG.
Quality, lossless and size targets
- Quality 75–85 suits most photos on websites; use 90 for images with text or fine detail.
- Lossless stores the decoded JPG pixels exactly. For photos this is usually larger than the original JPG, because JPG’s compression noise has to be kept too — use it only when an exact copy matters.
- Fit under a file size searches for the highest quality that stays under your limit (1 KB = 1,000 bytes). With Allow smaller dimensions, images that cannot fit even at low quality are scaled down step by step.
- Limit the width scales wider photos down to that width (height follows) and never enlarges small ones.
Can every browser and app show WebP?
All current versions of Chrome, Edge, Firefox, Safari and Opera display WebP, so it is safe for websites. Some desktop software, older systems and upload forms still expect JPG; for those, keep the JPG or convert back with WebP to JPG. WebP is documented by the IETF in RFC 9649.
Limitations
- Up to 100 photos per batch, each up to 200 MB and 50 megapixels.
- EXIF metadata (camera, date, GPS) is not copied to the WebP, and colours are converted to sRGB.
- In Safari, WebP is encoded with WebAssembly, which is slower than the built-in encoders of other browsers for very large photos.
- Sizes with a target are searched by quality; the result is always at or below the target unless that is impossible, which is then shown on the file.
Privacy
Everything happens in your browser. What you enter or open here is not uploaded or stored by MySmartCoPilot.
Frequently asked questions
What quality should I use?
80 is a good default for photos: visually very close to the original at a much smaller size. Use 85–90 for images with text, and 60–75 when size matters more than detail.
Why is my WebP bigger than the JPG?
This can happen when the JPG was already heavily compressed, when you chose a high quality, or with Lossless (lossless WebP of a photo is usually larger than the JPG). Lower the quality, or keep the original JPG for that file.
Does converting to WebP remove the photo’s location?
Yes. Metadata such as GPS coordinates, camera model and date is not copied into the WebP. The photo is rotated to its correct orientation first, so it still displays upright.
Will WebP work on my website?
Yes for all current browsers. If you also need to support very old browsers, serve the WebP with a JPG fallback using the HTML picture element.
Are my photos uploaded?
No. Conversion happens in your browser — including the WebAssembly encoder used in Safari — and works offline once the page has loaded.