PNG to WebP Converter
WebP was built to replace PNG on the web, and for most images it does so at a fraction of the size while keeping full transparency. Converting PNG to WebP is the single easiest way to make a page load faster without redesigning anything. Quality is adjustable, alpha is preserved, and the files stay on your machine.
How to convert PNG to WebP
- Drop your PNG files into the box above, click to browse, or paste an image with Ctrl+V.
- Adjust the quality, background or output size if you need to. The defaults are already sensible.
- Click Convert and download your WebP files, one by one or as a single ZIP archive.
Why convert PNG to WebP
Page weight is dominated by images, and PNG is the heaviest common format. Swapping PNG assets for WebP routinely removes 60 to 80 percent of their size while keeping the transparency that made PNG necessary in the first place, which is why Lighthouse, PageSpeed Insights and Core Web Vitals reports recommend it so insistently. Faster pages measurably improve both search rankings and conversion. The compatibility argument that used to count against WebP has expired: every browser in current use decodes it, including Safari since version 14. The one case to be careful with is an image that will be downloaded and opened outside a browser, where PNG remains the safer file to hand over.
Your files stay on your device
Conversion happens entirely inside your browser using standard web technologies. Nothing is uploaded, nothing is stored, nothing is logged. You can open your browser network inspector during a conversion and watch it stay completely silent.
About PNG Image
PNG, short for Portable Network Graphics, was published in 1996 as a patent-free replacement for GIF and has been the default lossless image format of the web ever since. It stores pixels exactly as they were written, so text stays sharp, flat colour stays flat, and repeated editing never degrades the image. Its alpha channel carries 256 levels of transparency, which makes it the standard choice for logos, icons, screenshots and interface assets. The cost is file size: because nothing is discarded, a photograph saved as PNG is routinely four to ten times larger than the same photograph saved as JPEG or WebP.
- Standardised by the W3C in 1996 and supported by every operating system, browser and image editor.
- Lossless: re-saving a PNG a hundred times produces a pixel-identical file every time.
- True 8-bit alpha channel, so edges and soft shadows blend cleanly onto any background.
- Ideal for screenshots, logos, line art and anything containing text; a poor choice for photographs.
- Cannot store animation. APNG exists but is a separate extension with uneven support.
About WebP Image
WebP is a modern image format developed by Google and released in 2010 as a single replacement for JPEG, PNG and GIF. It offers both lossy and lossless compression, supports transparency and animation, and typically produces files 25 to 35 percent smaller than an equivalent JPEG or PNG at comparable visual quality. Every current browser decodes WebP, which is why most content delivery networks and publishing platforms now serve it automatically. The trade-off appears outside the browser: many desktop applications, older photo editors, print shops and operating system preview tools still refuse to open a .webp file, and that gap is the reason most people end up converting one.
- Created by Google in 2010, based on the VP8 video codec; the lossless mode arrived in 2011.
- Supports a full 8-bit alpha channel in both lossy and lossless modes, which JPEG cannot do at all.
- Decoded by Chrome, Firefox, Safari 14 and later, Edge and every mobile browser in current use.
- Animated WebP exists and is far more efficient than GIF, but very few desktop applications play it.
- Weak spot: support outside the browser. Office suites, older editors and print workflows still reject it.
Frequently asked questions
Is transparency kept when converting PNG to WebP?
Yes. WebP supports a full 8-bit alpha channel just like PNG, so cut-outs, soft shadows and semi-transparent edges survive the conversion intact at any quality setting.
How much smaller will the WebP be?
Typically 60 to 80 percent smaller at quality 90. Screenshots and photographs shrink the most; small flat icons sometimes barely change, and occasionally a tiny PNG is already smaller than any WebP of it.
Does this conversion lose quality?
At the default quality of 90 the difference is very hard to see, but the browser encoder used here is lossy, so it is not pixel-identical to the PNG. Raise the quality slider toward 100 if the image contains fine text or hard-edged graphics.
Will the WebP file open on other devices?
In a browser, yes, on effectively everything in use today. Outside a browser it is much less certain: many desktop viewers, office suites and print workflows still refuse WebP, so keep a PNG for anything you send to people directly.
Should I use WebP or AVIF for my website?
WebP is the safe default right now: broader support, faster encoding and very good compression. AVIF compresses better still but has thinner tooling support. This tool converts to WebP; AVIF is planned.