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JPG to WebP Converter

Turn JPG files into WebP in a couple of clicks. JPG is the universal lossy photo format; WebP is a modern web format, ~30% smaller than JPG at similar quality. Some detail is discarded to fit the target format; how much depends on the format and your settings.

Not uploaded to any serverConverted on this deviceGone when you close the tabHow this works

Drop your files here

JPG files (.jpg, .jpeg, .jpe, .jfif) · up to 120 MB each

or paste files from your clipboard

Ready when you are

Drop a JPG file above and FileTools360 will turn it into WebP — right here on your device, without uploading anything.

⌘K to search converters

How to use it

  1. 1

    Add your JPG files

    Drag them onto the drop area, choose them from your device, or paste them from your clipboard. You can queue several at once. Nothing is sent anywhere — the file stays on this device.

  2. 2

    Adjust the settings if you want to

    The defaults suit most people. Open Advanced to control quality and metadata removal.

  3. 3

    Convert and download

    Press Convert. Everything happens on your own device — nothing is uploaded. Download files one by one, or grab them all as a ZIP.

Privacy, in plain words

Is it safe? Your JPG file is not uploaded anywhere

What “uploaded” normally means. On most online converters, pressing the button copies your file across the internet onto a computer owned by that website. That copy is what the word “upload” means, and it is the part nobody explains.

What happens instead. This site does not do it. There is no server here that receives files, so your JPG file is read, converted and handed back by the browser you are using right now. It never travels — so there is no copy to store, read, leak or hand over.

Check it yourself in ten seconds

Turn off your Wi-Fi after this page has loaded, then convert a file anyway. It still works, because everything needed is already on your device.

The longer explanation of how this works, and the full detail of what is and is not stored on the privacy page.

Why this matters more than it sounds

Photographs carry more than what is in the frame — most also carry the time, the device and often the GPS coordinates where they were taken. It matters more than it sounds, because of what images usually are:

Screenshots of private messages

conversations that included other people

Photos of ID cards and licences

the usual way people send identity documents

Screenshots of bank transfers

account details, and proof of what you paid whom

Medical scans and photographs

X-rays, results, images of a condition

A file that is never sent cannot be kept, leaked, subpoenaed or used to train anything. That is a property of how this works, not a promise about how carefully it is run.

JPG and WebP explained

JPEG is a lossy image format designed for photographs. It works by discarding detail the human eye is least likely to notice, particularly in colour and in smooth gradients, which is why it compresses photos far better than it compresses text or line art.

WebP is a Google-developed format that offers both lossy and lossless modes, transparency, and animation in one container. In its lossy mode it typically produces files around 25–35% smaller than JPEG at comparable visual quality.

Where JPG files come from
Digital cameras, phone screenshots on Android, and essentially every photo on the pre-2015 web.
Where WebP is used
Modern websites, and increasingly the default export from web-focused design tools.

JPG vs WebP

The two formats solve different problems, which is why converting between them involves trade-offs rather than a straight upgrade.

JPG compared with WebP
PropertySourceTarget
CompressionLossyLossy or lossless
TransparencyNoYes
AnimationNoYes
Introduced19922010
Browser supportOpens everywhere — every browser, OS and device.All modern browsers. Some older desktop apps can't open it.
JPG is stronger at
Opens on literally every device, browser and application ever made. Small files for photographic content. Adjustable quality, so you control the size/fidelity trade-off.
WebP is stronger at
Substantially smaller than JPEG at similar quality. Supports transparency, which JPEG cannot. Supports animation, replacing GIF at a fraction of the size.

Why convert JPG to WebP?

People make this switch when they run into the limits of JPG: the image has transparency, sharp edges, text, or you plan to edit and re-save it repeatedly. WebP is the better fit when you are publishing images on a website and want smaller files without a visible quality drop.

JPG limitations that prompt the switch
No transparency — there is no alpha channel at all. Visible artefacts around sharp edges and text. Every re-save degrades the image further (generation loss).
What you give up
Desktop applications and older software often cannot open it. Some photo printing services and older phones reject it.

Does converting JPG to WebP reduce quality?

WebP compresses without discarding data, but it cannot represent everything a JPG file holds. What does not fit is discarded permanently, so converting the result back will not restore it. Keep the JPG original if it is the only copy.

Saving a JPEG at 100% quality is still lossy — it is a large file that has been through the same discarding process, not a lossless copy.

Measured, not estimated

What converting JPG to WEBP actually costs

On every sample measured, the WEBP came out smaller — 5% smaller at worst and 2.9× smaller at best.

Nothing came through untouched. Similarity against the input file ranged down to 0.991, where 1.000 would mean no visible change at all.

Each row is one sample chosen to isolate a property these formats treat differently.
SampleJPG inWEBP outChangeSimilarity
Smooth gradientContinuous tone with no detail — the easiest thing to compress, and where banding shows first.12.5 KB5.1 KB−59%0.991
Hard-edged text and UIHigh-contrast edges. This is where JPEG's ringing artefacts appear and where PNG wins.90.9 KB50.3 KB−45%0.991
Film-like noiseRandom detail. Incompressible by design — the worst case for every lossy codec.209 KB199 KB−5%0.992
Flat colour blocksLarge areas of one colour — a logo or a chart. Lossless formats should crush this.4.9 KB1.9 KB−61%0.991
Soft alpha edgeA transparent gradient. JPEG cannot store it at all, which is the single most common reason a conversion surprises someone.14.3 KB5.0 KB−65%0.991

Produced by a stand-in encoder. Your browser's own encoder has no equivalent outside a browser, so this was measured with the same codec at the same quality from a different implementation. Expect the shape of the answer to hold and the exact bytes to differ.

Samples are generated from a fixed seed rather than taken from real photographs or documents, so the corpus is reproducible and carries no licensing question — and so the numbers predict the shape of your result rather than its exact size. Measured 2026-10-01. The method, and the command that regenerates every figure on this page, are on the how it works page.

About these formats

Source

JPEG Image

The universal lossy photo format.

Extensions
.jpg, .jpeg, .jpe, .jfif
MIME type
image/jpeg
Best for
Photographs · Email and messaging · Maximum compatibility
Compatibility
Opens everywhere — every browser, OS and device.

Target

WebP Image

Modern web format, ~30% smaller than JPG at similar quality.

Extensions
.webp
MIME type
image/webp
Best for
Websites · Smaller file sizes · Transparency + animation
Compatibility
All modern browsers. Some older desktop apps can't open it.

Good to know

JPG to WebP Converter — questions

How do I convert JPG to WebP?

Drop your JPG file onto the area above, then press Convert. The WebP file saves straight to your device. You do not need an account, and there is no watermark.

Is it safe to convert JPG files here — are they uploaded to a server?

No, nothing is uploaded. On most online converters, pressing the button copies your file across the internet onto a computer owned by that website; it is converted there and sent back. That copy is what "upload" means, and it is the part that puts your file out of your control. This site does not do it. Your JPG file is read and converted by the browser you are using right now and never leaves this device, so there is no copy for anyone to store, read or hand over. You can prove it: turn off your Wi-Fi after this page loads and the conversion still works.

Can I convert confidential JPG files, like bank statements or contracts?

Yes, and that is the case this site was built for. Because the file never leaves your device, a confidential document is no more exposed than it is sitting in your own folder — there is no transfer, no copy on someone else's hardware, no retention period to read about and no staff with access. Nothing is logged about the file either: not its name, not its size, not its contents. The one thing worth saying plainly is that this protects the file in transit and at rest on our side, not from anything already on your own computer.

Does converting to WebP reduce quality?

WebP uses lossy compression, so some data is discarded. At the default quality the difference is very hard to see or hear; raise the quality setting if you need to be certain, at the cost of a larger file.

How large a file can I convert?

Up to 120 MB per file for this conversion. Because the work happens in your browser, the practical limit is your device's memory — larger files work on a desktop with plenty of RAM and may fail on an older phone.

Can I convert several files at once?

Yes. Add as many as you like and press Convert All. Each file is processed independently, so one failure does not stop the rest, and you can download everything together as a ZIP.

Can I use this on my phone?

Yes. FileTools360 works in mobile browsers on iOS and Android, including choosing files straight from your camera roll. Very large images may run out of memory on a phone — those are better converted on a laptop.

Read more about these formats

We Measured What Image Formats Actually Cost

Five test images, four formats, five quality settings, and the numbers that came out — including the case where lossless compression beats every lossy encoder.

JPG vs PNG: Which Image Format Should You Use?

The most common image format question, answered with the one rule that actually decides it.

WebP vs JPG: Is WebP Actually Better for Websites?

Whether the smaller files are worth the compatibility trade-off, and where WebP genuinely loses.

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527 converters and tools65 file formatsnothing ever uploaded.