Supported formats
22 formats across images, video, and audio — each with a page explaining what it is, where it came from, and when it is the right choice. Some are read-only, and we say so rather than letting you find out at the download step.
Image formats
Images convert through ImageMagick compiled to WebAssembly — the same engine that has run on servers for decades, running here inside your browser tab.
HEIC
read onlyApple's default iPhone photo format — efficient, but poorly supported outside the Apple ecosystem.
3 conversionsJPEG
read + writeThe universal photo format — lossy compression with small files and support everywhere.
17 conversionsPNG
read + writeLossless compression with full transparency support — ideal for graphics, screenshots, and logos.
14 conversionsWebP
read + writeGoogle's modern web format — typically 25–35% smaller than JPEG at the same visual quality, with transparency.
7 conversionsAVIF
read + writeThe most efficient widely-supported web format — often half the size of JPEG at the same quality.
6 conversionsJPEG XL
read + writeThe designated successor to JPEG — better compression, lossless recompression of existing JPEGs, HDR support.
4 conversionsTIFF
read + writeThe archival and print-industry standard — high fidelity, large files, wide professional tool support.
3 conversionsBMP
read + writeUncompressed Windows bitmap — simple, huge files, legacy compatibility.
2 conversionsICO
read + writeThe favicon and Windows icon format — small square images up to 256×256.
3 conversionsDNG
read onlyAdobe's open camera RAW format, used by many cameras and phones.
1 conversionCR2
read onlyCanon’s RAW format from older EOS cameras.
1 conversionCR3
read onlyCanon’s current RAW format from modern EOS R and M cameras.
1 conversionNEF
read onlyNikon’s camera RAW format.
1 conversionARW
read onlySony’s camera RAW format from Alpha cameras.
1 conversion
Video formats
Video runs on WebCodecs, your browser’s own hardware-accelerated pipeline. When the source codec already fits the target container, the file is repackaged rather than re-encoded: lossless and nearly instant.
MOV
read onlyApple’s QuickTime container — the default for iPhone and Mac screen or camera recordings.
1 conversionMP4
read + writeThe universal video container — plays on virtually every device, player, and platform.
7 conversionsWebM
read + writeThe open web video format — efficient VP9/AV1 compression, native in every modern browser.
2 conversionsMKV
read onlyThe flexible open container common for rips and recordings — holds nearly any codec.
1 conversionProRes
read onlyApple’s professional editing codec — enormous, edit-friendly files from Final Cut, cameras, and capture tools.
1 conversion
Audio formats
Audio uses the same engine as video, which is why pulling an MP3 out of a video file works the same way as converting one audio file to another.
What “read-only” means here
A read-only format is one we can open but not create, and the reasons are specific rather than a matter of effort. HEIC has no encoder available to us at all — the patent situation means the encode delegate is simply not compiled into the engine. Camera RAW formats like CR2, NEF, and ARW are manufacturer-specific sensor dumps; converting away from RAW is the normal direction, and writing a synthetic RAW file would be a strange thing to want. MOV and MKV are containers we can unpack into MP4 or WebM, and ProRes decodes but always re-encodes on the way out.
The practical upshot: every format on this page can be a source, and the ones marked writable can also be a destination. The converter only ever offers you targets it can actually produce.