JPG to WebP Converter

JPG to WebP conversion here runs entirely in your browser, so your JPEG photos are never uploaded to a server. Most people land on this page to shrink JPEG hero images and gallery photos into smaller WebP files for faster page loads (better LCP and PageSpeed scores), or because a CMS upload field now wants WebP. You can do that in bulk, pick your own quality, and walk away with nothing left on any remote machine to delete.

What this conversion actually does (and does NOT do)

This is a lossy-to-lossy conversion. A JPEG (or JPG, the same format with two extensions) is already lossy, so re-encoding to WebP adds a second generation of compression on top of the first. At a high WebP quality (roughly q 80-90) that second pass stays visually imperceptible, which is why the 75-85 range is the recommended web sweet spot rather than a blanket "maximum quality" setting.

The headline win is file size. A WebP lossy file is typically 25-34% smaller than a visually equivalent JPEG (Google quotes ~25-34%; some tools cite up to 50% on certain images), so a ~500KB JPEG hero usually drops to around 330-375KB. That is the direction you should expect: smaller, sometimes substantially.

The single most counterintuitive fact: if your source JPEG was already heavily compressed (saved at q=50, or re-saved many times), converting to WebP can give you no benefit or even a slightly LARGER file. There is little redundancy left for WebP to exploit, so do not assume every JPEG shrinks. WebP also applies smoothing while encoding, which conveniently hides JPEG block artifacts on low-quality sources but can soften fine textures on high-quality photos, giving them a faintly airbrushed look.

What it does NOT do: JPEG has no alpha channel, so there is no transparency to preserve when going from JPG to WebP. Do not expect transparent output from a JPEG source (that only matters when converting PNG to WebP). It also does not raise color depth: WebP here is 8-bit (24-bit color, sRGB), matching JPEG, so you gain no HDR or wide-gamut range. And it is always lossy here: this page encodes lossy WebP at the slider quality, which is the right choice for photos, since lossless WebP usually produces a larger file than lossy for photographic sources. Lossless WebP is only used as an automatic fallback if your browser cannot encode lossy WebP, and a note tells you when that happens.

When to choose JPG to WebP vs the alternative

Choose WebP when the destination is the modern web and the goal is smaller files at equivalent visual quality, which describes nearly every blog image, product photo, or hero banner. Keep the original JPEG, though: convert to WebP only as a final delivery step, because re-editing a lossy WebP later compounds quality loss generation by generation.

If you actually need transparency, a JPEG cannot give it to you regardless of target, since the source has no alpha. In that case start from a PNG instead and use PNG to WebP conversion, which preserves the alpha channel. If you instead need maximum legacy compatibility (older email clients or some desktop image viewers that still choke on WebP), keep JPEG. For the general-purpose batch converter that lets you pick any source and target, see the image converter.

How to convert

1. Drop one or many JPG/JPEG images into the tool. They are read locally in your browser, never uploaded.
2. The output format is pre-selected to WebP; use the quality slider (90-95 for near-lossless, 75-85 for the web sweet spot).
3. Because WebP supports alpha but JPEG has none, there is no transparency to flatten here: the conversion is straightforward color data.
4. Click Convert: a single file downloads directly, and multiple files download together as a ZIP (no count cap).

No upload. It runs on your device.

Your browser decodes the JPEG and its built-in canvas encoder writes the WebP at your chosen quality, all inside your browser tab. If the browser cannot encode lossy WebP, a Rust module compiled to WebAssembly writes a lossless WebP instead. There are zero network requests for your file: the bytes go from your disk into the page's memory, get encoded to WebP, and come back as a download. After the page loads once, you can disconnect your network entirely and it still works. Nothing is uploaded, so there is nothing on a server to delete afterward, and you can confirm it yourself by watching the DevTools Network tab while you convert. This matters because JPEG photos straight from a phone or camera routinely carry EXIF metadata, including GPS coordinates and device details, that you may not want leaving your machine on a third-party converter.

No limits

Convert as many JPEGs as you want in one batch. There is no file-count cap, no per-file size ceiling, no watermark stamped on output, no sign-up, and no ads.

Frequently asked questions

Will converting JPEG to WebP reduce quality?

It can, because JPEG is already lossy and re-encoding to WebP adds a second generation of compression. At a high WebP quality of roughly q 80-90 the loss is visually imperceptible, so the 75-85 range is the practical sweet spot for web delivery.

How much smaller is WebP compared to JPEG?

WebP lossy files are typically 25-34% smaller than a visually equivalent JPEG, and some images compress even further. In real terms a ~500KB JPEG hero image usually lands around 330-375KB as WebP.

Is converting JPEG to WebP done in my browser or uploaded to a server?

Everything runs in your browser, using its built-in WebP encoder (with a Rust/WebAssembly fallback), so the file is never uploaded. You can verify this by opening the DevTools Network tab during conversion and confirming no request carries your image.

Can I convert multiple JPEGs to WebP at once (batch)?

Yes. Drop as many JPG/JPEG files as you like and they all convert in one pass with no file-count limit. A single file downloads directly, while multiple files come back as one ZIP archive.

What quality setting should I use when converting JPEG to WebP?

For most web use, 75-85 is the recommended balance of size and fidelity. Push the slider to 90-95 for near-lossless results on important photos, accepting a larger file in exchange.

Does WebP support transparency when converting from JPEG?

WebP supports alpha, but JPEG has no alpha channel, so a JPG to WebP conversion has no transparency to preserve. If you need a transparent result, start from a PNG and convert that to WebP instead.

Why did my WebP file come out larger than the JPEG?

This happens when the source JPEG was already heavily compressed (for example saved at q=50 or re-saved many times), leaving little redundancy for WebP to exploit. With nothing left to squeeze, the WebP can end up the same size or slightly larger, which is normal for low-quality inputs.

Should I use lossy or lossless WebP for photos?

Use lossy for photographic JPEG sources, which is what this page produces, since lossless WebP usually produces a larger file for photos. Lossless is better suited to logos, text, and flat graphics, not the kind of imagery a JPEG typically holds.

Do all browsers support WebP images?

WebP is supported by every modern browser (Chrome, Firefox, Safari 14+, Edge, and Opera), covering roughly 96%+ of users. The main gaps are some legacy desktop image viewers and older email clients.

Does this remove EXIF/GPS metadata from my photos during conversion?

Yes. The browser re-encodes only the pixels, so the JPEG's EXIF block, including camera and GPS details, is not written into the WebP. Because everything runs locally, the original photo and its metadata never leave your device in the first place.

Related tools: browse the image tools hub, preserve transparency with PNG to WebP, or read why this all runs locally in converting to WebP without uploading.