Image Format Converter
Convert HEIC, JPG, PNG, WebP, and AVIF images
Batch conversion with quality control and optional resize. Files never leave your browser.
Drop images here
or click to choose files
HEIC · JPG · PNG · WebP · AVIF · TIFF · BMP · GIF
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How image conversion works
- 1Drop your images
Images are read directly in your browser — nothing is sent to any server. HEIC files from iPhone, TIFF from scanners, and all common web formats are supported.
- 2Choose format and quality
Select JPG for broadest compatibility, WebP for smaller file sizes, AVIF for best compression, or PNG for lossless output. Drag the quality slider or leave it at the smart default for each format.
- 3Files convert automatically
Each image is decoded into a bitmap and re-encoded with OffscreenCanvas. HEIC uses a WASM decoder that only loads when you actually drop a HEIC file. Conversion runs up to four files at a time.
- 4Download individually or as ZIP
Click any file to download it, or use the Download all button to get a ZIP containing every converted image.
Which format should you use?
| Format | Best for | Pros | Cons |
|---|---|---|---|
| JPG | Photos, sharing, email attachments | Universal compatibility | Lossy, no transparency |
| PNG | Screenshots, logos, anything with transparency | Lossless, transparency | Larger files than JPG |
| WebP | Web images, reducing page weight | 30–40% smaller than JPG at same quality | Not supported in some older apps |
| AVIF | Web images where maximum compression matters | 50% smaller than JPG at same quality | Limited app support, slower to encode |
Frequently asked questions
- Are my images uploaded to a server?
- No. All conversion happens in your browser using OffscreenCanvas and WebAssembly. Your files never leave your device.
- Why can't I open HEIC photos from my iPhone on Windows?
- HEIC is Apple's proprietary format. Windows doesn't include a HEIC decoder by default (unless you install the HEVC Video Extensions from the Microsoft Store). Converting to JPG gives you a file that opens everywhere.
- Does converting to JPG lose quality?
- Some quality is lost because JPG is lossy. At 85% (the default), the difference is invisible at normal viewing sizes. If you need pixel-perfect preservation, use PNG instead.
- What is WebP and should I use it?
- WebP is Google's image format designed for the web. It produces files 30–40% smaller than JPG at equivalent visual quality, with full browser support in all modern browsers. It's the best choice for web publishing.
- What is AVIF?
- AVIF is based on the AV1 video codec and achieves even better compression than WebP — typically 50% smaller than JPG. Browser support is good (Chrome, Firefox, Safari 16+) but some image editing apps don't support it yet.
- Can I resize images while converting?
- Yes. Enable the Resize toggle in the settings panel and enter a max dimension (in pixels). Both width and height are scaled proportionally so the image fits within that square.
- What happens to EXIF data?
- EXIF metadata (camera model, GPS coordinates, etc.) is stripped during conversion because OffscreenCanvas re-encodes the pixel data only. This is good for privacy when sharing photos online.
- Is there a file size or count limit?
- No hard limits — it depends on your browser's available memory. Very large images (over 50 megapixels) may be slow to decode, especially HEIC files.