PNG to WEBP converter: free, fast and secure
This free PNG to WEBP converter turns your PNG images into WEBP files in seconds, right in your browser. WEBP makes images about 25–35% smaller than JPG, which helps your website load faster and can improve your Google ranking.
Unlike most converters, ConvertKaro never uploads your images. The conversion happens on your own device, so it is quicker, there are no file limits, and your photos stay private.
How to convert PNG to WEBP in 3 steps
- Add your PNG files. Tap “Select files” or drag and drop one or more .png images into the box above. You can also paste a screenshot with Ctrl+V.
- Adjust the options. Set the quality slider. Lower quality means a smaller WEBP file.
- Download your WEBP. Conversion starts instantly. Download each WEBP file, or all of them at once as a ZIP.
Why use ConvertKaro PNG to WEBP? Free, fast and secure
There are many PNG to WEBP websites, but most of them upload your files, add watermarks or ask you to pay. Here is why this one is better.
100% Free
PNG to WEBP on ConvertKaro costs nothing. There is no trial, no premium plan and no hidden limit, so you can use it as often as you like.
Fast results
Because nothing travels to a server, results appear almost instantly. Large files are limited only by the speed of your own phone or computer.
Secure and private
Nothing is uploaded. Sensitive files like Aadhaar, PAN, salary slips or contracts stay on your own phone or laptop the whole time.
No signup, no watermark
No account, no email and no watermark on your result. Open the page and start.
Works on every device
Designed for mobile first, so it works just as well on your phone as on a desktop computer.
Quality you control
A simple quality slider lets you choose between the smallest file and the best picture, with a sensible default already set.
ConvertKaro vs other online converters
| ConvertKaro | Typical online tool | |
|---|---|---|
| Price | Free forever, every feature | Free trial, then paid plans |
| Your files | Stay on your device | Uploaded to a server |
| Signup | Not needed | Often required |
| Watermark or ads on result | Never | Common on free plans |
| Speed | Instant, no upload wait | Depends on upload speed |
| Daily limits | None | Usually limited |
PNG vs WEBP: what is the difference?
Both formats store images, but they are built for different jobs. Here is a quick comparison.
| PNG | WEBP | |
|---|---|---|
| Full name | Portable Network Graphics | WebP (by Google) |
| Type | Raster, lossless | Raster, lossy or lossless |
| Compression | Lossless | Lossy and lossless |
| Transparency | Yes | Yes |
| Animation | No | Yes |
| File size | Large for photos, small for graphics | Very small |
| Support | Everywhere | All modern browsers; some older apps cannot open it |
| Best for | Logos, screenshots, graphics with text, transparent images | Website images, faster page loads, e-commerce |
What is PNG?
PNG is a lossless image format, so it keeps every pixel exactly as it is. It supports full transparency, which makes it the standard choice for logos, icons, screenshots and graphics with sharp text. Because nothing is thrown away, photos saved as PNG are usually much larger than the same photo as JPG or WEBP. PNG works in every browser, design tool and operating system.
What is WEBP?
WEBP is a modern image format released by Google in 2010. It produces files roughly 25–35% smaller than JPG at similar quality, supports transparency like PNG and can even hold animation. Most websites now serve WEBP to load faster. The catch is compatibility: some older Windows photo viewers, editing apps, printers and upload forms still refuse WEBP files.
When should you convert PNG to WEBP?
- Product photos for Shopify, WooCommerce and other online stores
- Blog and website images that need to load fast
- Improving Core Web Vitals and PageSpeed scores
- Saving storage on image-heavy sites
Tips for the best WEBP results
- For websites, 75–85% quality is usually the best balance between size and sharpness.
- You can convert many PNG files at once. They are processed one after another and can be downloaded together as a ZIP.
- Keep your original PNG files until you have checked the converted WEBP images.
How PNG to WEBP keeps your photos and images private
Most online converters upload your file to their server, process it there and send it back. That costs time, uses your data pack and means a copy of your file sits on someone else’s computer. PNG to WEBP works differently: the page loads the tool into your browser, and your photos and images are processed by your own phone or computer. The file never travels over the internet, so it cannot be leaked, stored or misused.
Using PNG to WEBP on your phone
PNG to WEBP is designed for small screens. Buttons are large, options are simple, and downloads save directly to your phone storage. On iPhone, downloaded files appear in the Files app under Downloads; on Android they go to the Downloads folder.
Who uses PNG to WEBP?
Here are some of the people who find this tool most useful:
- Students uploading photos and signatures to exam and admission forms
- Online sellers preparing product photos for Instagram, Meesho, Amazon and Shopify
- Office staff handling ID cards, scans and screenshots
- Bloggers and web designers who need fast-loading images
- Anyone sharing pictures on WhatsApp, email or social media
Supported input: JPG, JPEG, PNG, WEBP, HEIC/HEIF (iPhone), AVIF, GIF, BMP, TIFF and SVG.
Frequently asked questions
Will converting PNG to WEBP reduce quality?
WEBP stores the image lossy and lossless, so no extra quality is lost during conversion.
Does WEBP keep transparency from PNG?
Yes. WEBP supports transparency, so transparent areas in your PNG stay transparent.
Can I convert multiple PNG files to WEBP at once?
Yes. Select or drop as many PNG images as you like. Each one is converted separately, and you can download them all together as a ZIP file.
Is PNG to WEBP really free?
Yes. PNG to WEBP on ConvertKaro is 100% free with no limits, no signup and no watermark. There is no paid version.
Is it safe to use PNG to WEBP online?
It is one of the safest ways to do it, because nothing is uploaded. All processing happens locally on your device, and the files disappear when you close the page.
Does PNG to WEBP work on mobile?
Yes. It works in Chrome and Safari on Android phones and iPhones, as well as on tablets and computers. No app is needed.
Is there a file size limit in PNG to WEBP?
No upload means no server limit. The only limit is your device’s memory, which comfortably handles everyday files and even large batches.
Will ConvertKaro add a watermark or ask me to sign up?
No. There is no watermark, no login and no email required. Your downloaded file is exactly your result.
Does PNG to WEBP work offline?
Once this page has finished loading, the tool keeps working even if your internet connection drops, because all processing happens on your device.