Converted Files
| Filename | Format | Before | After | Δ Size | Save |
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Free Online Image Format Converter
Format Forge converts images between PNG, JPEG, WebP, AVIF, and BMP entirely in your browser. No files are ever uploaded to a server — all processing happens locally using the browser's native image codecs. It's fast, private, and free.
PNG — Lossless with Alpha
PNG is a lossless format that preserves every pixel perfectly. It supports full transparency, making it ideal for logos, icons, screenshots, and artwork.
JPEG — Compact Photos
JPEG uses lossy compression optimised for photographs. JPEG does not support transparency — transparent areas are filled with white during conversion.
WebP — Modern & Versatile
WebP offers both lossy and lossless compression with alpha support and is widely supported in modern browsers.
AVIF — Next-Generation Smallest Files
AVIF is highly efficient and supports alpha transparency. This build includes a local WASM encoder, so AVIF output works without calling external CDNs.
BMP — Raw Compatibility
BMP stores pixels uncompressed, producing large files but strong compatibility with legacy software.
Frequently Asked Questions
Are my images uploaded to a server?
No. Format Forge runs 100% in your browser using JavaScript. Your images are processed entirely in local memory and never leave your device.
Which formats can I convert from?
Any format your browser can decode — including PNG, JPEG, WebP, AVIF, GIF, BMP, ICO, SVG, and TIFF on supported browsers.
Can I batch convert multiple files?
Yes. Drop or select multiple files, pick your target format, and convert them all at once.