Drop images here or click to upload
Supports all major image formats · Batch up to 20 files
All conversion happens locally in your browser. Images never leave your device.
Convert iPhone HEIC photos to any format. No app install needed.
Convert SVG vector graphics to PNG, JPG, or any raster format.
Convert any image to PDF document. Perfect for sharing and printing.
Convert up to 20 images at once. Download all as a ZIP file.
JPG, PNG, WebP, HEIC, SVG, AVIF, GIF, BMP, TIFF, ICO, PDF — all in one tool.
| Format | Best For | Alpha | Size |
|---|---|---|---|
| JPEG | Photos | No | Small |
| PNG | Graphics, screenshots | Yes | Medium |
| WebP | Web images | Yes | Smallest |
| AVIF | High quality photos | Yes | Very small |
| HEIC | iPhone photos (input) | No | Small |
| SVG | Vectors, logos (input) | Yes | Tiny |
| GIF | Simple animations | Limited | Medium |
| BMP | Uncompressed | No | Very large |
| TIFF | Print / archival | Yes | Large |
| ICO | Favicons | Yes | Small |
| Documents, sharing | No | Medium |
Convert image format online free with FreeToolBox — transform JPG, PNG, WebP, AVIF, HEIC, SVG, BMP, and GIF images between formats instantly in your browser. Whether you need to convert PNG to JPG to reduce file size, change JPG to WebP for better web performance, or convert HEIC iPhone photos to a universally supported format, our Image Format Converter handles it all. You can convert multiple images at once, choose output quality, and download results individually or as a ZIP archive.
Unlike cloud-based converters, FreeToolBox converts images entirely in your browser using the HTML5 Canvas API and WebAssembly codecs. Your images never leave your device — no server upload, no privacy risk. The conversion is fast, free, completely watermark-free, and supports a wider range of formats than most online tools.
Input formats: JPG, PNG, WebP, AVIF, HEIC, HEIF, SVG, BMP, GIF. Output formats: JPG, PNG, WebP, AVIF, BMP. HEIC decoding requires the libheif library which loads automatically in the browser.
AVIF generally offers the best compression, followed by WebP, then JPG. PNG is lossless and typically larger. For web use, WebP is the recommended choice due to excellent compression and broad browser support.
Yes. Upload as many images as you need. They will all be converted to your selected format and you can download them all at once as a ZIP file.
No. All format conversions happen entirely within your browser. Your images are never uploaded to our servers or any third party — complete privacy guaranteed.