How do I convert PNG to WebP online for free?

Drop your PNG files into ImageShift, select WebP as the output format, adjust quality if needed, then click Convert. Your WebP files download instantly – no sign-up required.

Is my image data safe when I convert online?

Yes. ImageShift processes all images entirely inside your browser using the Canvas API. No file is ever sent to a server, so your images remain 100% private.

Can I convert multiple images at once?

Yes. ImageShift supports bulk conversion of up to 20 images simultaneously. When done, you can download all converted files as a single ZIP archive.

What image formats does ImageShift support?

ImageShift supports PNG, JPG/JPEG, WebP, AVIF, GIF, BMP, TIFF, ICO, and SVG as input, and can convert to WebP, JPG, PNG, AVIF, GIF, and BMP as output formats.

No upload · No sign-up · Runs entirely in your browser

Convert Images
Fast. Free. Private.

The cleanest bulk image converter on the web. PNG to WebP, JPG to WebP, AVIF, and 15+ more formats — convert up to 20 images at once, right in your browser.

0 Images at once

0+ Format conversions

0 Files sent to server

0% Free, always

PNG → WebP JPG → WebP WebP → PNG PNG → JPG JPG → AVIF GIF → WebP

Output Format

Quality: 85%

SmallerBalancedBest quality

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Drop images here

or click to browse your files

PNGJPGWebPAVIFGIFBMPTIFFSVGICO

Up to 20 images · 25MB each · Processed locally in your browser

100% Private

All processing happens inside your browser via Canvas API. Zero data leaves your device — ever.

Instant Conversion

No waiting for server round-trips. Your images convert at full browser speed — usually under a second each.

Bulk Convert × 20

Drop up to 20 images at once. Convert them all in one click and download a tidy ZIP archive.

Before / After Preview

Click any converted image to see a side-by-side before/after comparison with size savings displayed.

Quality Control

A precision quality slider (10–100%) lets you dial in the perfect balance of size versus visual fidelity.

Smart Resize

Optionally resize images during conversion. Width, height, or both — with automatic aspect ratio locking.

Formats

Supported Image Conversions

Everything from legacy BMP to next-gen AVIF — we cover the full spectrum.

From	To	Best For	Size Change
PNG	WebP	Web images, e-commerce thumbnails	Up to 30% smaller
JPG	WebP	Photography, hero images, social media	Up to 34% smaller
WebP	PNG	Editing in Photoshop / GIMP	Lossless quality
WebP	JPG	Social sharing, email attachments	Broad compatibility
PNG	JPG	Reducing screenshot file sizes	Up to 60% smaller
JPG	PNG	Adding transparency, design assets	Lossless re-encode
GIF	WebP	Animated web thumbnails	Up to 64% smaller
PNG	AVIF	Next-gen web, Chrome / Firefox	Up to 50% smaller
JPG	AVIF	High-res photography, modern browsers	Up to 50% smaller
BMP	JPG	Scanned docs, Windows graphics	Dramatic reduction

How it works

Three Steps. No Account. No Waiting.

From drop to download in seconds — here's the process.

Upload Your Images

Drag and drop up to 20 images, or click to browse. Supports PNG, JPG, WebP, HEIC, AVIF, GIF, BMP, TIFF, ICO, and SVG — up to 25MB each.

Choose Format & Quality

Select your target format (WebP, JPG, PNG, AVIF…) and tune quality with the slider. Optionally resize to exact pixel dimensions.

Convert & Download

Hit Convert All and watch the progress. Download files individually or grab them all as a single ZIP archive.

FAQ

Frequently Asked Questions

Everything you need to know about converting images online.

How do I convert PNG to WebP for free?: Drop your PNG files into ImageShift, select WebP from the format dropdown, adjust quality if needed, then click Convert All. Your WebP files download instantly — no sign-up or payment required.
Is my image data private?: Yes — completely. ImageShift uses the browser's Canvas API to process images entirely on your device. No file is ever sent to any server. Not even our CDN sees your images.
Can I convert multiple images at once?: Yes. You can convert up to 20 images in a single batch. Each file shows its own progress indicator, and when done you can download everything as a single ZIP archive.
Why convert JPG or PNG to WebP?: WebP delivers 25–34% smaller file sizes than JPEG and up to 30% smaller than PNG at comparable visual quality. Smaller images mean faster page loads, better Core Web Vitals scores, and improved Google search rankings — especially for e-commerce and blog sites.
What formats are supported?: Input: PNG, JPG/JPEG, WebP, GIF, BMP, TIFF, ICO, SVG (and HEIC on supported browsers). Output: WebP, JPG, PNG, AVIF, GIF, BMP.
Does it work on mobile?: Yes. ImageShift is fully responsive and works on Android and iOS browsers. Tap the upload area to select photos from your camera roll and convert them instantly.
What quality setting for WebP?: For most web images, 80–85% quality gives an excellent balance between file size and visual quality. For hero images or photography, 85–90% is recommended. For thumbnails, 70–75% is usually fine.
Is AVIF better than WebP?: AVIF generally achieves 20–50% better compression than WebP, especially at lower quality settings. However, AVIF has slightly less browser support. For maximum compatibility use WebP; for maximum compression on modern browsers, choose AVIF.

PNG to WebP: Why Format Matters for Your Website

If you run a website, blog, or online store, the image formats you use directly affect your Google search rankings, page load times, and user experience. Google's Core Web Vitals now explicitly reward fast-loading sites — and images are almost always the biggest culprit behind slow pages.

WebP is Google's open image format designed specifically for the web. It supports both lossy and lossless compression, as well as transparency — something JPEG cannot do. Converting your PNG and JPG images to WebP can reduce file sizes by 25–34% without any visible quality loss.

How This Image Converter Works

ImageShift uses the browser's built-in Canvas API and HTMLCanvasElement.toBlob() to perform image conversion entirely on your device — no server involved:

Your selected image is read using the FileReader API.
It is drawn onto an off-screen HTML5 canvas at the original (or resized) dimensions.
The canvas exports pixel data as a new image in the chosen format at your specified quality.
The resulting Blob is converted to a download URL and delivered directly to your browser.

Because this all happens inside your browser tab, no image data is ever transmitted to any external server, making ImageShift one of the most privacy-respecting image converter tools available online.

WebP vs JPG vs PNG vs AVIF: Which Format to Use?

WebP — Best for the web. Excellent compression, supports transparency and animation. Supported by all modern browsers.
AVIF — Best-in-class compression but slower to encode. Use on Chrome and Firefox for cutting-edge performance.
PNG — Best for design assets, logos, screenshots, and anything needing lossless quality or transparency.
JPG/JPEG — Widest universal compatibility. Great for photographs where lossless quality is not required.
GIF — Only for simple animations; WebP animated is a superior and smaller alternative.

Tips for the Best Results

Use 80–85% quality for WebP — rarely any visible quality difference vs 100%, but significant file size savings.
Resize before optimising — if your original is 4000×3000px but you need 800×600px, use the resize feature to dramatically cut output size.
Convert hero images first — they are typically the largest files on a page and have the most impact on load time.
Batch convert product photos — for WooCommerce or Shopify stores, bulk converting product images to WebP at 82% quality is a quick SEO win.

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