Convert PNG to WebP Online Free

How PNG to WebP works

Upload PNG

Drag & drop or click to select your PNG file.

Choose Options

Adjust quality, size, or other output settings if needed.

Download WebP

Click Convert and your WebP file downloads instantly.

About PNG to WebP conversion

WebP is Google's modern image format designed to replace both JPG and PNG on the web, supported natively by Chrome since 2010, Firefox since 2019, Safari since macOS Big Sur and iOS 14, and Edge since 2018. Converting PNG to WebP delivers 20-30% smaller files at lossless quality and up to 70% smaller at high lossy quality, with full alpha-channel support intact. For static site generators (Hugo, Eleventy, Astro), Next.js Image, and Cloudflare's Polish pipeline, WebP is now the default delivery format for transparent assets.

WebP supports both lossless and lossy encoding modes - lossless uses a predictive transform plus entropy coding similar to PNG's DEFLATE but smarter, while lossy uses VP8-derived block prediction like a single video keyframe. For UI assets, icons, and screenshots stick with lossless WebP to preserve crisp pixel edges; for photographic content with transparency (product shots on white, hero images with vignettes) lossy WebP at quality 80-85 is visually indistinguishable from the source PNG and 60-75% smaller. Alpha is preserved in both modes.

The main reason teams still ship PNG fallbacks is legacy browser support - IE11, older Safari, and ancient Android WebViews don't recognize the format. The standard approach is the HTML5 picture element with WebP source and PNG fallback, or content negotiation via Accept headers in Cloudflare Workers / Vercel Edge. For app icons (iOS, Android, Windows), favicons, and email signatures, keep PNG. For everything served from a website CDN, convert to WebP. See also JPG to WebP for photographic sources.

Where WebP comes from

WebP was released by Google in 2010, derived from the VP8 video codec it acquired with On2 Technologies. Lossless WebP and animation support were added in 2011 and 2012 respectively. The format languished for years because Safari refused to ship it, but Apple finally enabled native support in macOS Big Sur and iOS 14 (September 2020), making WebP truly cross-browser overnight. Today, every major CDN, image-CMS, and framework (Next.js, Cloudinary, imgix) serves WebP by default. It typically delivers 25-35% smaller files than PNG at identical visual quality, with full alpha transparency preserved.

PNG vs WebP at a glance

	PNG	WebP
Compression	Lossless DEFLATE (PNG)	Lossless or lossy VP8L / VP8
Typical size	Baseline	25-35% smaller lossless, up to 80% smaller lossy
Transparency	Full 8-bit alpha	Full 8-bit alpha in both lossy and lossless modes
Animation	Not supported (use APNG)	Native animation support
Browser support	Universal since 1996	All modern browsers since 2020 (Safari 14+)

Real-world workflow — E-commerce dev cutting product page weight on a Shopify store

Export 1,800 product PNGs from the photography team's Lightroom catalogue
Batch-convert with quality 82 lossy WebP and lossless fallback for line-art SKUs
Upload the WebP set to the Shopify CDN and update the Liquid templates to use the picture element
Keep PNG fallbacks for the 2% of legacy Android visitors flagged by analytics
Lighthouse score jumps from 64 to 91 on mobile, conversion rate climbs measurably the following week

Recommended conversion settings

Use case	Settings
Hero images / banners
Product thumbnails
Logos / line art
App icons / UI sprites
Animated UI elements

Where will your WebP file open?

Platform	PNG	WebP
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When to convert PNG to WebP

Converting PNG to WebP delivers the best of both worlds: WebP's lossless mode preserves PNG's pixel-perfect quality and full alpha channel transparency while achieving file sizes typically 26% smaller than equivalent PNGs. For UI assets, icons, logos, and any graphic requiring both transparency and zero quality loss, PNG-to-WebP lossless is the ideal format for modern web delivery.

Frontend developers optimising website asset bundles convert PNG sprite sheets, icon libraries, and UI graphics to WebP to reduce total payload and improve Lighthouse performance scores. Build tools like webpack, Vite, and Next.js support WebP image optimisation natively, and converting PNGs as part of the build pipeline is a standard step in modern frontend performance engineering.

Game developers and web application teams serving image assets through CDNs convert PNG graphics to WebP to reduce bandwidth costs and storage. A PNG icon library at 500 KB becomes approximately 370 KB in WebP - Individually modest savings that become substantial across millions of requests per day at production scale.

PNG to WebP tips

Use lossless WebP for screenshots, UI mockups, and any image with sharp text - it's 20-30% smaller than optimized PNG with bit-perfect fidelity.
Use lossy WebP at quality 80-85 for photographic content with transparency - product shots and hero images shrink 60-75% with no visible difference.
Always ship a PNG fallback via the picture element if you support legacy browsers - or use a CDN that does Accept-header negotiation automatically.
Don't convert iOS or Android app icons to WebP - the asset catalogs still require PNG at fixed pixel sizes (180x180, 192x192, etc).
Strip the EXIF and color profile chunks with cwebp -metadata none for the smallest possible output - they're rarely needed on web assets.

Why use this PNG to WebP converter

WebP preserves PNG transparency while cutting file size by 25–35%

Both lossy and lossless WebP modes available at all quality levels

All modern browsers support WebP natively, no plugins needed

Files auto-deleted after 24 hours, nothing stored permanently

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Formats involved

PNG – Portable Network Graphics

PNG uses lossless compression and supports transparency. Ideal for logos, UI graphics, screenshots, and any image where pixel-perfect reproduction is required.

PNG to JPG

WebP – Web Picture Format (Google)

WebP delivers 25–35% smaller files than JPG at equivalent quality. Supported in all modern browsers and ideal for improving website performance and Core Web Vitals.

WebP Converter

PNG to WebP tips

WebP supports alpha transparency just like PNG, so logos and graphics with transparent areas convert cleanly.
At quality 80–90, WebP is visually identical to lossless PNG but 25–35% smaller — ideal for web deployment.
If browser support for WebP is uncertain in your use case, keep the original PNG as a fallback.

PNG to WebP — frequently asked questions

Yes for current versions of Chrome, Edge, Firefox, Safari (14+), Opera, and Samsung Internet - roughly 96% of global traffic per caniuse.com. IE11 and Safari on macOS 10.15 or earlier don't support it, so a PNG or JPG fallback via picture source is still the safe pattern for public-facing sites.

Fully - WebP supports an 8-bit alpha channel in both lossless and lossy modes, matching PNG's RGBA capability exactly. The encoder handles soft drop shadows, anti-aliased edges, and semi-transparent overlays without artifacts. This is why WebP is now the preferred format for transparent web assets.

Lossless for flat-color art, screenshots, UI exports, logos, and anything with sharp text - matches PNG quality and is 20-30% smaller. Lossy at quality 80-85 for photographic content where the original PNG was a transparent product render - cuts size 60-75% with imperceptible quality loss at typical viewing sizes.

Not in lossless mode - the WebP decoder reconstructs the original RGBA pixel values exactly. In lossy mode quality drops by definition, but at quality 85 the change is invisible to all but the most trained eye on side-by-side comparison. Quality 90+ is overkill and gives up most of the size advantage.

Optimized PNG (oxipng, zopflipng) still loses to lossless WebP by 20-30% on most content because WebP uses smarter predictive transforms. The only reasons to compress PNG instead are legacy browser support, asset pipelines that reject WebP, or destinations like iOS app icons that require PNG.