Free Online Image Converter

Convert JPG, PNG, WebP, AVIF and GIF images online for free. Upload your image, choose a new format, and download the converted file in seconds. ResizeLab processes images directly in your browser, so files are not uploaded to our servers.

Use ResizeLab’s free online image converter to convert JPG, PNG, WebP, AVIF and GIF images directly in your browser. No software installation, account, or upload required. Just drop your image, pick the format, and download the result. Works on desktop, mobile, and tablet.

The converter handles all common image formats. JPG to WebP. PNG to JPG. WebP to PNG. AVIF to JPG. Any direction you need. The conversion runs in the browser, so your image stays on your device. Images are processed locally in your browser and are not uploaded to our servers. Just a fast, private file conversion.

Not sure which image format to choose? Read our complete guide: How to Convert Images Online (JPG, PNG, WebP and AVIF).

If you need to convert something right now, use the image converter below. If you are looking for a specific conversion, see the full list of supported formats.

Convert JPG to WebP, PNG to JPG, WebP to PNG and more

ResizeLab supports the most common image format conversions used for websites, social media, email attachments, and digital publishing. Whether you need a JPG to WebP converter, PNG to JPG converter, WebP to PNG converter, or AVIF to JPG converter, you can convert files in seconds without installing software.

Convert images online without uploading

Unlike many image converters, ResizeLab processes files locally in your browser. Your images are not uploaded to a server, making conversions faster and more private. Whether you need to convert JPG to WebP, PNG to JPG, or AVIF to JPG, the entire process happens on your device. This is ideal for sensitive images, confidential documents, or any situation where you want control over your data.

Supported image formats

The ResizeLab image converter handles these conversions in both directions. Whether you need to convert a photo for a website, prepare an image for email, or change formats for compatibility, the converter handles the most common image conversion tasks in a single step.

• JPG to WebP
• PNG to WebP
• WebP to JPG
• WebP to PNG
• JPG to PNG
• PNG to JPG
• JPG to AVIF
• PNG to AVIF
• AVIF to JPG
• GIF to WebP

All conversions work in the browser. Upload a JPG and get a WebP. Upload a PNG and get a JPG. Upload a WebP and get an AVIF. The converter processes the image locally and returns the new format in seconds.

How to convert an image

1. Upload your image. Drag and drop the file into the converter or click browse to select it. The converter accepts JPG, PNG, WebP, and AVIF files.
2. Choose the output format. Pick the format you want. The converter will convert to that format regardless of what the input was.
3. Adjust settings if needed. Some conversions allow quality adjustment. For example, converting to JPG or WebP lets you set the quality level. PNG conversions are lossless and always produce full quality.
4. Download the converted file. The converted image downloads automatically. The filename is branded resizelab.app-XXXXXX-XXXXXX for easy identification.

That is the entire workflow. Four steps. Ten seconds. Done.

Why use the ResizeLab image converter

Browser-based. Everything happens in the browser. Your image is loaded into memory, converted using canvas and JavaScript, and downloaded. No server upload. No data transfer. The file never leaves your device.

Fast. Converting a single image takes a few seconds. Converting a batch of five takes a few more. The converter is designed for speed. No loading screens. No progress bars that stall. Just fast conversion.

No signup. Open the page and convert. No account creation. No email verification. No passwords. No subscription prompts. Just a tool that works when you need it.

Works on all devices. The converter works in Safari, Chrome, Firefox, and Edge on iOS, Android, macOS, Windows, and Linux. Any modern browser on any modern device. Upload from your phone and download the converted file to your phone. Same as desktop.

Privacy-focused. Because nothing uploads, there is no data collection. Images are processed locally in your browser and are not uploaded to our servers. The page is a static HTML form with client-side JavaScript. No server is involved.

Free. The converter is free to use. There is no premium tier. No watermarks. No limits on the number of conversions per day. Large batches may be limited by your device’s available memory and processing power.

Best format for different use cases

JPG for photos. A photograph saved as JPG is the smallest format with acceptable quality. JPG uses lossy compression, which removes invisible detail. The result is a small file that looks the same as the original. Use JPG for photos and photographic images where file size matters more than pixel-perfect quality.

PNG for graphics and transparency. A logo, icon, or diagram with text should be saved as PNG. PNG uses lossless compression, which preserves every pixel exactly. PNG also supports transparency, so the background can be transparent or semi-transparent. Use PNG when you need transparency or when the image contains text or sharp edges.

WebP for websites. WebP is the modern web format. It supports both lossy and lossless compression, plus transparency. A WebP file is typically 25–35% smaller than an equivalent JPG, and the quality is the same. Every modern browser supports WebP. If you are putting images on a website, use WebP. If you need to convert existing images to WebP, the ResizeLab image converter handles this in one step.

AVIF for maximum compression. AVIF is the newest format. It compresses better than WebP, producing the smallest possible file at the same visual quality. The trade-off is compatibility. AVIF is supported by Chrome and Firefox, but Safari support is newer. If your audience uses modern browsers, AVIF is the best choice for the smallest files. If you need broad compatibility, WebP is safer.

Why convert image formats?

Different image formats are designed for different purposes. Converting an image can reduce file size, improve website loading speed, preserve transparency, or increase compatibility with older software and devices.

• Convert JPG to WebP for smaller website images
• Convert PNG to JPG for smaller file sizes
• Convert WebP to JPG for compatibility with older software
• Convert JPG to AVIF for maximum compression
• Convert PNG to WebP to keep transparency while reducing file size

Popular image conversions

These are the most common conversions people use:

• JPG to WebP — shrink photos for websites
• PNG to WebP — keep transparency at smaller file sizes
• WebP to JPG — convert to universal format for email or older systems
• JPG to AVIF — maximum compression for modern browsers
• AVIF to JPG — convert to the most compatible format

Every conversion runs in the browser. No upload. No signup. No software to install.

Related image tools

The image converter is part of the ResizeLab tool set. After converting, you might need to compress, resize, or crop the result. Here are the related tools:

• Image Compressor — reduce file size without changing format. JPG compression at 80% quality is the default. PNG compression at 100% quality for lossless files.
• Image Resizer — change the dimensions of an image. Resize to exact pixels or by percentage. Lock aspect ratio or crop freely.
• Image Cropper — crop an image to a specific area. Use the visual drag-and-drop editor to select the crop area and export in any format.
• Online Image Tools Hub — browse all available tools. Converters, compressors, resizers, croppers, and more. All browser-based, free, and privacy-focused.

Frequently asked questions

What image formats can I convert?

The converter supports JPG, PNG, WebP, and AVIF in any direction. You can convert JPG to PNG, PNG to JPG, JPG to WebP, WebP to PNG, PNG to AVIF, AVIF to JPG, and any other combination. GIF to WebP is also supported for converting GIFs to modern web format.

Can I convert images on my phone?

Yes. The converter works on any modern mobile browser. Open the page on your phone, tap the upload area, select a photo from your camera roll, pick the output format, and download the converted file. The process is the same on iOS and Android.

Does image conversion reduce quality?

Converting between lossless formats does not reduce quality. PNG to WebP in lossless mode preserves every pixel. Converting to a lossy format like JPG or WebP in lossy mode removes some data. At 80–90% quality, the visual difference is usually invisible. The converter defaults to 80% quality for JPG and WebP, which is the sweet spot for most use cases.

Is WebP better than JPG?

For websites, yes. WebP is smaller than JPG at the same quality. A WebP at 80% quality is typically 25–35% smaller than an equivalent JPG. WebP also supports transparency, which JPG does not. For general use where maximum compatibility matters, JPG is still the safest choice. For websites, WebP is the better choice.

Can I convert PNG with transparency?

Yes, but only to formats that support transparency. PNG to WebP preserves transparency. PNG to JPG removes transparency because JPG does not support it. If you convert a PNG with a transparent background to JPG, the background becomes solid white. For transparent images, convert PNG to WebP or PNG to PNG. For non-transparent images, any format works.

Are my files uploaded?

No. The converter runs entirely in the browser. Your image is loaded into the page memory, processed with JavaScript, and converted. The converted file is generated locally and downloaded. Nothing is uploaded to a server. Nothing is stored. Nothing is shared. The file never leaves your device.

Is the tool free?

Yes. The converter is completely free to use. There is no premium version, no subscription, no credit card, no signup. All features are available to everyone. Large batches may be limited by your device’s available memory and processing power.

What is the best format for websites?

WebP is the best format for websites. It is smaller than JPG and PNG at the same quality. It supports transparency. It is supported by every modern browser. If your CMS or CDN supports WebP, you should use it for all images. Serve JPG as a fallback for older browsers. The ResizeLab image converter converts to WebP in one step.

What is the best image format for SEO?

For most websites, WebP offers the best balance between image quality and file size. Smaller images load faster, which can improve page speed and user experience. AVIF files are often even smaller, but WebP currently offers broader compatibility across websites and tools. If you are optimizing images for SEO, convert to WebP first, then compress to 80% quality. The ResizeLab image compressor handles this in one step.

Conclusion

The ResizeLab image converter is a simple, fast, and private way to convert images between formats. No installation. No upload. No signup. Just open the page, drop your image, pick the format, and download the result. Convert JPG to WebP for smaller website files. Convert PNG to JPG for smaller email attachments. Convert AVIF to JPG for maximum compatibility. Whatever you need, the converter handles it in the browser.

Need help choosing the right format? Read our guide on how to convert images online to learn when to use JPG, PNG, WebP, and AVIF.

Ready to convert an image? Use the converter above. Want to explore more tools? Visit the Online Image Tools Hub.