Convert MRW to APNG Online

Make an Animated PNG from Minolta MRW Photos

This tool stitches a set of Minolta MRW RAW frames into a single animated PNG (APNG) — useful for turning a bracketed sequence, an interval timelapse, or a burst from a DiMAGE or Dynax body into one looping, web-ready file. Each MRW is demosaiced and rendered to an 8-bit sRGB frame, then written into a lossless APNG that keeps full 24-bit colour plus alpha, with the first frame doubling as the static fallback in any viewer that does not animate. Upload one MRW and you get a clean single-frame APNG; upload several and you get the animation.

How to Convert MRW to APNG

1. Upload Your MRW Files: Drag and drop your .mrw files or click "Add Files." For an animation, add the frames in shooting order — that becomes the play order.
2. Set the Framerate: Pick a value from the FRAMERATE dropdown (the default is 10 FPS); lower FPS holds each frame longer, higher FPS plays the sequence faster.
3. Tune Image Quality, Resolution and Colors (optional): Adjust Image quality (%), drop the Image resolution to a preset to shrink the file, or reduce Colors with dithering if you want a smaller output.
4. Convert and Download: Click Convert and save your APNG. No sign-up, no watermark.

MRW and APNG at a Glance

Frequently Asked Questions

Can one MRW file become an animated PNG?

A single MRW produces a one-frame APNG — effectively a lossless still in the PNG container. Animation needs at least two frames, so add multiple MRW files (a burst, bracket, or timelapse) and they are written as sequential frames in upload order.

Will I lose quality converting MRW to APNG?

APNG is lossless, so the encoding step itself adds no compression artefacts. The quality ceiling comes from the demosaic: MRW holds 12-bit sensor data, and rendering it to an 8-bit sRGB frame discards the extra RAW headroom you would otherwise use for exposure or white-balance recovery. For a finished animation that is normally invisible; if you need the latitude, edit the RAW first.

Why pick APNG over GIF for this?

GIF caps each frame at 256 colours with on/off transparency only, which crushes the smooth gradients and skin tones a camera RAW captures. APNG keeps full 24-bit colour and 8-bit alpha, so a demosaiced photo sequence looks far closer to the original. The trade-off is size: a lossless APNG is usually larger than the same clip as a GIF or animated WebP.

How do I control how fast the animation plays?

Use the FRAMERATE dropdown. It sets a uniform delay across every frame, so 10 FPS shows each frame for a tenth of a second and 2 FPS holds each for half a second. To slow a timelapse down, pick a lower framerate; to make a burst look fluid, pick a higher one.

What happens in a browser that doesn't support APNG?

APNG degrades gracefully: any decoder that doesn't understand the animation chunks renders the first frame as an ordinary static PNG. Roughly 94.7% of users (Chrome 59+, Firefox 3+, Safari 8+, Edge 79+) see the full animation, and the rest see a clean still rather than a broken image.

Are my MRW files kept private?

Yes. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours — no sign-up, no watermark, never shared or made public. In our testing, a five-frame DiMAGE A2 sequence rendered to a roughly 6:1 APNG in a single pass. If you only need stills, convert MRW to JPG instead; to build an APNG from existing PNG frames, use the PNG to APNG maker.