JPG to WebP Converter
Convert JPG images to WebP to speed up your website. Get up to 35% smaller files with the same visual quality.
Drag & drop your JPG file here
or click to browse · Max 10 MB
Where WebP's Savings Actually Come From
Lossy WebP is built on VP8 intra-frame coding — the compression used for keyframes in WebM video. JPEG, designed in 1992, splits the image into 8 × 8 blocks and applies a discrete cosine transform to each one independently. WebP works with larger, variable block sizes and, crucially, uses prediction: it guesses each block's contents from neighbouring pixels already decoded, then stores only the difference between the guess and reality.
That prediction step is why the savings are real rather than marketing. Smooth gradients — skies, skin, studio backdrops — are highly predictable, so WebP encodes them with very few bits. It also handles sharp edges better, which is why WebP images tend to avoid the blocky halos JPEG produces around high-contrast boundaries at low quality.
In practice a JPG re-encoded to WebP at matched visual quality lands 25–35% smaller. On a page carrying twenty photographs, that is the difference between a fast site and a sluggish one, and it is measured directly by Core Web Vitals.
Measured Savings on a Typical Product Photo
One 2000 × 1500 px studio photograph, encoded at visually matched quality settings.
WebP quality numbers are not interchangeable with JPEG's. WebP at 75–80 generally looks like JPEG at 85–90; comparing the same number on both scales will mislead you.
You Are Re-Encoding, Not Rewrapping
Your JPG has already been through lossy compression once. Converting it to lossy WebP compresses it a second time, on top of the existing artifacts. At sensible quality settings this is invisible and entirely worth it. But if you still have the original camera file or the export from your design tool, encode WebP from that instead — a single generation of compression always beats two, and the file will be smaller as well as cleaner.
Where WebP Belongs — and Where It Still Breaks
Browser support has been universal since 2020. Everything outside the browser is a different story.
- ✓Images on websites and web applications — the case it was designed for
- ✓Improving Largest Contentful Paint and PageSpeed scores
- ✓Product galleries and image-heavy landing pages
- ✓Anywhere you control the HTML and can supply a fallback
- ✕Email attachments and HTML email — client support remains patchy
- ✕Print shops and photo labs, which routinely reject WebP
- ✕Files handed to clients who will open them in older software
- ✕Uploads to portals that validate the file extension strictly
JPG vs WebP
| Property | JPG | WebP |
|---|---|---|
| Introduced | 1992 | 2010 |
| Compression | DCT, 8 × 8 blocks | VP8 prediction, variable blocks |
| Transparency | No | Yes, 8-bit alpha |
| Animation | No | Yes |
| Lossless mode | No | Yes |
| Typical photo size | Baseline | 25–35% smaller |
| Browser support | Universal | All modern browsers |
| Email client support | Universal | Unreliable |
How to Convert JPG to WebP
- 1.Upload your JPG. Drag the file onto the uploader above, or click to browse.
- 2.Convert to WebP. Pixel dimensions are unchanged; only the encoding changes.
- 3.Download and deploy. Serve WebP from your site, but keep the JPG for email, print and anything outside the browser.
Frequently Asked Questions
How much smaller is WebP compared to JPG?
WebP files are typically 25–35% smaller than JPG at equivalent visual quality. This makes a measurable difference in page load speed.
Will converting JPG to WebP improve my Google PageSpeed score?
Yes. Google Lighthouse and PageSpeed Insights flag JPG images as an opportunity to 'Serve images in next-gen formats'. Converting to WebP directly addresses this recommendation.
Is WebP supported in all browsers?
Yes. Chrome, Firefox, Safari (since 2020), and Edge all support WebP. Over 97% of global browser users can display WebP images.
Does JPG to WebP conversion lose quality?
Both JPG and WebP use lossy compression. When converting, some minor quality loss can occur but at our default quality settings it is not visible to the human eye. Where possible, encode WebP from your original camera file rather than from an already-compressed JPG — one generation of compression always beats two.
Why does WebP quality 80 look like JPG quality 90?
The two scales are not comparable. They are different encoders with different internal maths, and the number simply means different things. As a working rule, WebP at 75–80 is visually equivalent to JPEG at 85–90. Setting both to the same number and comparing the results is the most common mistake people make when evaluating WebP.
Should I delete my JPG files after converting?
No. Keep them. Browser support for WebP is universal, but email clients, print services and older desktop software frequently are not. The usual approach is to serve WebP on the website and keep the JPG as the copy you send to people.