JPG to WebP converter: same photo, smaller file
Convert JPG photos to WebP to cut file size by roughly a quarter to a third at matching quality. Useful for faster web pages, smaller uploads and lighter photo libraries. Batch convert in your browser, nothing uploaded.
Drop images here, or choose files
JPG, PNG, WebP, HEIC, GIF, BMP, AVIF. Up to 50 files at a time. Nothing is uploaded.
Files never leave your device. Check the network tab if you like.
What WebP actually buys you
WebP is a newer image format built by Google that compresses photographic detail more efficiently than JPG. At matching visual quality it typically produces a file 25–35% smaller, which on a photo-heavy website adds up to a real difference in how fast pages load, a factor search engines weigh directly. Every major browser released since roughly 2020, including Safari, displays WebP natively, so the old compatibility argument against it has mostly gone away for viewing; the remaining friction is in software that creates or accepts uploads, not in browsers that display them.
This is the same trade-off search-engine performance guidance keeps repeating: image weight is usually the single largest contributor to a slow-loading page, ahead of scripts or fonts, so switching a photo gallery or blog's images from JPG to WebP is often the highest-impact, lowest-effort change available to someone who is not a developer.
Where compatibility still bites
Office documents made before 2022 cannot insert a .webp image directly, some print shops and older photo software do not recognise it, and a number of upload forms and marketplaces still whitelist only JPG or PNG. If you are not sure a destination supports it, keep a JPG copy as a fallback or check the site's accepted file types before converting your whole library.
This mostly affects files, not what you see in a browser: an image embedded in a modern website as WebP displays correctly for effectively every visitor, so converting for a site's own image tags is safe. The caution applies to files you hand off elsewhere, such as attaching a WebP to an email, submitting it to a print shop, or pasting it into a document made with older software.
Matching quality between the two formats
JPG and WebP quality numbers are not directly comparable because the two encoders measure and discard detail differently. As a rough guide, WebP quality 75–80 looks about as good as JPG quality 85–90, at a noticeably smaller size. Push WebP quality much below 70 on a detailed photo and blocky artifacts appear sooner than the same quality number would suggest on JPG.
| JPG quality you liked | Roughly equivalent WebP quality | Size change |
|---|---|---|
| 95 | 85 | ≈30% smaller |
| 85 | 75 | ≈25–35% smaller |
| 70 | 60 | ≈20–30% smaller |
A real-world example
Take a typical 2000-pixel-wide blog photo saved as JPG at quality 85, weighing around 450 KB. Converting the same photo to WebP at quality 78 commonly lands between 300 and 340 KB, roughly a 25–30% cut, with the two images looking indistinguishable side by side on a normal screen. Across a page with a dozen such photos, that difference adds up to over a megabyte of data the visitor's browser does not have to download, which is the entire reason large websites switched to serving WebP in the first place.
WebP is still lossy in a browser
WebP has a lossless mode, but the browser's built-in encoder that this converter (and most browser-based tools) relies on always produces the lossy version. That is the right trade-off for photographs, which is what this page targets, but it is a poor choice for screenshots and graphics with sharp text and flat colour: those show visible smudging around edges at any quality setting a lossy encoder offers. Keep PNG, or convert those specifically at quality 90 and above, and check the result before publishing it.
This is worth stressing because WebP's marketing is built around photographs and it is easy to assume the format is a strict upgrade over PNG everywhere. It is not: PNG remains the correct choice for anything that needs true lossless output or transparency handled without any quality trade-off, and this converter's lossy WebP output should be treated as a photo tool, not a general-purpose PNG replacement.
Converting a whole photo library
Drop in every JPG in a folder, apply one quality setting to the batch and download the results as a single ZIP. If you are updating a website, remember that switching image files to .webp means updating anywhere the old .jpg filename is referenced, such as in HTML or a CMS's media library, or the new files simply will not show up.
For a product catalog or a blog archive, converting in one batch also keeps every image at a consistent quality setting, which matters more than it sounds: mixing quality 70 and quality 90 images across a page is more visually jarring than any single image being slightly softer, because the eye notices the inconsistency between neighbouring photos more than the absolute compression level of one.
Storage matters too, separate from page speed: a phone with thousands of photos can reclaim a meaningful amount of space by converting an older archive to WebP instead of JPG, since the saving compounds across every file. That trade only makes sense for photos you are keeping for viewing rather than for further heavy editing, where starting from a lossless or higher-quality source is preferable.
Frequently asked questions
- Is WebP always smaller than JPG?
- Almost always for photographs, typically 25–35% smaller at matching visual quality. Very small or already heavily compressed images sometimes show little difference.
- Do all browsers support WebP now?
- Yes, every browser released since around 2020 displays WebP natively, Safari included. The remaining gaps are in older software that creates files, not in viewing them.
- Will converting to WebP hurt my site's SEO?
- No, the opposite: smaller images load faster, which search engines factor into ranking through page speed and Core Web Vitals.
- Should I convert screenshots and logos to WebP too?
- Only at high quality. The lossy encoder used here can smudge sharp text and flat colours at lower settings; check the result before using it.
- Can I convert WebP back to JPG later?
- Yes, use the WebP to JPG converter on this site. Note that converting back and forth repeatedly adds compression loss each time.
Content last reviewed: 2026-09-03