What is Image Format Converter?
Image Format Converter is a free online tool that converts images between PNG, JPG, WebP, AVIF, and HEIC formats. All processing happens directly in your browser — fast, private, and with no server upload. Conversion starts automatically the moment you upload.
Convert to WebP or AVIF for web optimization, JPG for maximum compatibility, or convert iPhone HEIC photos for universal sharing. Batch convert multiple files and download as a single ZIP.
Key Features
5 Format Support
Convert between PNG, JPG, WebP, AVIF, and HEIC (iPhone) formats with a single click.
Auto-Convert on Upload
Conversion starts instantly when you upload. Changing settings automatically re-converts all images.
ZIP Batch Download
Convert multiple images at once and download them all as a single ZIP file.
Quality Control + Transparency Warning
Fine-tune quality for JPG/WebP/AVIF and get automatic warnings for transparent image conversion.
AVIF Support (Next-Gen)
Convert to AVIF when your browser supports it — up to 50% smaller than JPG at the same quality.
HEIC Support (iPhone Photos)
Drag and drop HEIC/HEIF files from iPhone directly — auto-detected and converted instantly.
How to Use
- Upload Images — Drag and drop or click to upload JPG, PNG, WebP, HEIC files.
- Select Output Format — Choose from JPG, PNG, WebP, or AVIF (if supported).
- Adjust Quality — Move the quality slider and images re-convert automatically.
- Download ZIP — Save individual files or download all converted images as a ZIP.
Use Cases
Website Performance
Convert PNG/JPG images to WebP or AVIF for significantly faster page loading.
iPhone Photo Sharing
Convert HEIC photos from iPhone to JPG for universal sharing on any platform.
Transparency Needs
Convert JPG images to PNG to enable background editing with transparency.
File Size Reduction
Convert PNG to JPG/WebP/AVIF to dramatically reduce file sizes.
Design Asset Export
Batch convert design exports to match delivery requirements in any format.
Blog & Social Media
Optimize photos by converting to WebP and adjusting quality for upload size limits.
Frequently Asked Questions
What's the difference between PNG and JPG?
PNG uses lossless compression with transparency support, ideal for logos/icons. JPG uses lossy compression, ideal for photos with smaller file sizes.
What is WebP?
WebP is an image format developed by Google that provides 25-35% smaller files than JPG with the same quality. Supported by most modern browsers.
What happens when converting a transparent image to JPG?
Since JPG doesn't support transparency, transparent areas will be replaced with a white background. Use PNG or WebP if you need transparency.
Does conversion reduce quality?
PNG is lossless with no quality loss. For JPG/WebP, quality above 80% is virtually indistinguishable from the original.
Are images uploaded to any server?
No, all conversions are performed locally using the browser's Canvas API. Images are never transmitted to any external server.
What is AVIF format?
AVIF is a next-generation image format based on the AV1 codec, offering up to 50% smaller file sizes than JPG at the same quality. Supported in Chrome 85+, Firefox 93+, and other modern browsers. The option appears only when your browser supports it.
Can I convert iPhone HEIC photos?
Yes! HEIC/HEIF images taken on iPhone or other Apple devices can be converted to JPG, PNG, WebP, and more. Simply drag and drop the file — it's detected and processed automatically.
Privacy Notice
This tool processes all image conversions in your browser. Images are never sent to or stored on any server, and no personal data is collected.
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