Convert PNG to WebP and keep transparency
PNG keeps every pixel, which is why the files get large. WebP keeps transparency too and stores the same picture in a fraction of the space.
- Transparency
- Preserved
- File size
- Usually much smaller
- Leaves your device
- Never
Which output should you pick?
Choose WebP when
- The image is going on a website and the PNG is heavy.
- You need to keep a transparent background.
- You are shipping an app or a game and the assets are too big.
Stay with PNG when
- You are sending the image to print or into an older editor.
- You need a truly lossless copy that survives more editing.
- Something in your workflow refuses WebP outright.
How it works
Choose your PNG file
The image is opened locally in this tab, on your own device.
WebP is already selected
This page opens with WebP as the target, so no setting needs changing.
Set the quality
Around 80 is a good starting point. Higher means a larger file.
The picture never leaves your device
Compressing or converting a photo usually means sending it to somebody else's computer and getting a new one back. Here the work happens in the page you are already looking at: your browser opens the file, the tool rewrites it, and the browser hands you the result.
- Opened from your disk by your browser — not sent anywhere first.
- Held in the tab while the tool works, then dropped.
- Saved to your device by your browser, not by a link to a server.
- Closing the tab clears the working copy completely.
- No account, so nothing is ever attached to an identity.
- No tracking of what you worked on or what was inside the file.
There is no queue and no waiting room. The picture is worked on in front of you and released the moment the tab closes. You can read more about how the conversion runs on your own device, or check our guide to verifying it in DevTools.
What people use it for
Making a format open everywhere
PNG, JPG and WebP each suit different jobs. Convert once and stop worrying about which app can read the file.
Shipping a lighter page
Hero images are usually the heaviest thing on a site. Getting them smaller before they reach your CMS is the fastest performance win available.
Sending photos on a weak signal
On hotel Wi-Fi or a poor mobile connection a full-resolution photo can sit at sending for minutes. A smaller copy goes through in seconds.
Preparing marketplace listings
Selling platforms set their own caps on size and dimensions. Get inside them before you start filling in the form.
Formats & limits
What this tool accepts, what it produces, and what it will never ask you for.
- Input
- PNG images
- Output
- PNG, JPG or WebP
- Maximum file size
- Set by your device, not by a plan
- Files per run
- Several at once
- Sign-up required
- None
- Watermark
- Never added
- Works offline
- Yes, once the page has loaded
- Supported browsers
- Any current Chrome, Edge, Firefox or Safari
When something goes wrong
Damaged files, and formats outside the list above, stop with a plain message rather than a spinner that never finishes. If a picture opens in your gallery it will normally open here.
The format is not supported. Convert it to PNG or JPG first, or try one of the other image tools.
Why not an upload site
An upload-based tool is a form that posts your picture to someone else's machine. Take that step out and a lot of small annoyances disappear with it.
A typical upload site
This tool
Questions
Will my transparent background survive?
Yes. Both PNG and WebP support transparency, and those areas are carried across unchanged. This is the main difference from converting to JPG, which has no transparency at all and fills those regions with white.
How much smaller will the file be?
It depends on the image, but the saving is usually substantial — PNG is lossless and stores every pixel, while WebP compresses. Flat graphics and screenshots often shrink the most.
Does converting to WebP lose quality?
It applies compression, so there is some loss, unlike PNG which is lossless. At a quality setting of 80 or above it is rarely visible. If you need a genuinely lossless file, stay with PNG.
Will every browser show my WebP?
Every browser released in the last several years will. WebP is supported by Chrome, Edge, Firefox, Safari, Opera and the browsers on Android and iOS. Only very old software has trouble with it.
Is there a file size limit?
The limit is your device rather than a plan. The work happens in your browser, so large images are bounded by available memory instead of a paid tier.
Is there a file size limit?
No fixed limit is imposed by the tool. The practical ceiling is how much memory your device has free, because the whole job runs inside this browser tab.