Convert Images Online
Free browser-based tool that converts HEIC, JPG, PNG, WebP, GIF, BMP, TIFF, AVIF and ICO images to JPG, PNG, WebP or AVIF. No server upload – conversion happens in your browser.
- Drop or select images – up to 20 files at once.
- Choose output format, click CONVERT, then save each file.
Drop Your Files Here
The Ultimate Guide to Image Conversion
Not having the correct image format for a task can result in everything from minor annoyances to serious business problems. Whether you're a web developer optimizing site performance, a photographer preparing prints, or just someone trying to share a photo that won't open on a friend's device, understanding image conversion is essential.
Why So Many Image Formats Exist
Image formats have evolved over decades to serve different purposes. JPEG was designed for photographs with millions of colors. PNG was created for images needing transparency. WebP and AVIF represent the next generation, offering superior compression while maintaining quality. Each format makes different trade-offs between file size, quality, features, and compatibility.
Why Is Image Conversion Important?
Compatibility Across Platforms
Different platforms and applications support different image formats. iOS devices capture photos in HEIC format, which isn't universally supported. Converting to JPEG or PNG ensures your images can be opened anywhere.
File Size Optimization
Different formats use different compression methods. Converting a PNG to WebP or AVIF can reduce file size significantly while maintaining visual quality. Smaller files improve website load speed, mobile performance, bandwidth usage, and SEO rankings.
Quality Control and Compression Strategy
Each format handles compression differently:
- JPEG uses lossy compression and is excellent for photographs.
- PNG supports lossless compression and transparency. It's great for logos and design materials.
- WebP and AVIF offer both lossy and lossless models, and are called Next-Gen formats.
- TIFF is often used for high-quality print workflows.
Transparency and Special Features
Some formats support features that others don't: PNG and WebP support transparency. JPEG doesn't. GIF and WebP support animation. The JPEG format sacrifices quality the more it's compressed.
No Software Needed for Highly Secure Image Conversion
Other image conversion tools also exist, but these tools typically send your file to a server somewhere to convert your image. That server might be secure, or completely insecure. That's a risk for all images, but especially when uploading sensitive documents such as ID and passport images.
That's why we developed FullConverter to run the entire conversion in your browser, meaning the image never leaves your computer. This is only possible because of HTML5 and WebAssembly, which allow sophisticated code to run directly in your browser. When using FullConverter, your images are perfectly secure.
Step-by-Step Guide: How to Use FullConverter
The first step is to select the source image from your device. If you're on a mobile phone or tablet, click the "Select Files" button. If you're on a device that uses a mouse or trackpad, you can drag images directly onto the conversion box.
If you upload multiple images with different formats, then you can select any target format as the final format for all images. When the conversion is complete, the individual "Save" buttons will appear.
What Image Types Does FullConverter Convert?
HEIF / HEIC
High-efficiency format standard on Apple devices. Often requires conversion to JPEG or PNG to be viewed on Windows machines or web browsers.
JPG / JPEG
The most widely used format for digital photos. Uses lossy compression to significantly reduce file size without noticeable differences in image quality.
PNG
A lossless format that supports transparency and maintains excellent detail. Widely used for logos and design work with sharp edges.
WebP
Developed by Google, supports both lossy and lossless compression, and transparency. Designed to be a single format to replace JPEG and PNG.
GIF
Legacy format limited to 256 colors. Still dominates the internet in the domain of animated images.
BMP
Uncompressed format from Microsoft. Stores images inefficiently as a map of bits. Often huge and used mostly in legacy applications.
TIFF / TIF
High-quality container format used primarily in professional printing and medical imaging where image data must remain perfectly intact.
AVIF
The newest major image format by the Alliance for Open Media. Offers the highest quality at the smallest file size using AV1 technology.
ICO
A specialized image format used specifically for desktop icons and favicons in browsers.
Summary: The world has many different image types, which adds complexity. With FullConverter, you can convert images for free, and 100% securely inside your own browser. Your files never leave your device.