Convert RAF to APNG Online

Make an APNG From Fujifilm RAF Frames

Drop a run of .raf files from an interval timer, a bracketing burst or a stop-motion setup and get back one looping animated PNG — full 24-bit colour, no 256-colour palette, no round trip through a raw editor first. Most APNG makers refuse raw camera files outright and expect you to export PNGs by hand; this page decodes each Fujifilm raw on our servers and assembles the frames directly. Upload one RAF and you get a single still image instead; the animation needs at least two files.

How to Convert RAF to APNG

1. Upload Your RAF Files in Shooting Order: Drag the .raf files onto the page or click "+ Add Files". Upload order is playback order, so sort them before you add them. Only .raf inputs are accepted here.
2. Set the Framerate: Pick a value from the Framerate dropdown. It ships on "10 FPS (Recommended)" and ranges from "1 FPS (Slideshow)" up to "50 FPS (Max Speed)"; the value becomes an exact per-frame delay of 1/N second.
3. Choose Combine and Resolution (Optional): Leave Combine on "Single animation" to build one APNG from all the frames, or switch to "Individual files" to get one output per raw. Under Image resolution, keep the original size or set Preset Resolutions / Width x Height to shrink every frame at once.
4. Convert and Download: Click Convert and save the .apng. Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically after a few hours. No sign-up, no watermark.

Framerate, Delay and How Long the Loop Runs

APNG stores each frame's delay as an exact numerator/denominator fraction, so the frame rate you pick is the frame rate you get. GIF cannot do this — it stores delays in hundredths of a second, so anything that is not a whole number of centiseconds is silently rounded. Every APNG produced here loops forever; the loop count is not adjustable.

APNG vs GIF for Raw Photo Frames

For photographic frames APNG is the better container by a wide margin — a Fujifilm raw is full-colour data, and forcing it through a 256-entry palette is where GIF conversions of photo sequences fall apart. If you specifically need the universal compatibility, use RAF to GIF instead and accept the palette.

What This Page Does Not Control

Worth knowing before you go hunting for a setting that is not there:

• No quality or file-size controls. APNG is a lossless container, so there is no quality slider, no target-size field and no colour-palette reduction on this page. The only size levers are resolution and frame count.
• No loop-count field. Output loops infinitely, always.
• No per-frame delays. One framerate applies to every frame in the animation.
• Frames are capped at 4096 pixels on the long edge. Each raw is normalised to a clean PNG before assembly and the long edge is clamped to 4096. A 40-megapixel X-T5 frame is 7728×5152 according to Fujifilm's own specification, so it arrives in the animation at 4096×2730. Every 3:2 Fujifilm frame wider than 4096 lands on the same 4096×2730 canvas.
• Mismatched frame sizes get transparent padding. If your files are not all the same dimensions, each frame is fitted onto a shared canvas sized to the largest one, centred, with transparent bars filling the gap — not black or white ones.

Frequently Asked Questions

Why did my single RAF file produce a still image instead of an animation?

Because there is nothing to animate. A one-frame sequence is duplicated internally so the assembler has two frames to work with, and the assembler then recognises the two frames as identical and collapses them back into one. The result is a valid, plain static PNG carrying an .apng name — no animation control block, no playback. Upload two or more raw files to get a real animation.

What frame rate should I use for an interval-timer timelapse?

Start at the default 10 FPS and adjust from the length you want, not from the look. Divide your frame count by the target duration: 240 frames over 10 seconds needs 24 FPS, so pick 25. If the result stutters it is usually not the frame rate — it is uneven spacing in the original interval capture, which no playback rate can smooth out.

Do my RAF files keep their 14-bit depth in the APNG?

No. APNG itself can store 16 bits per channel, but the raw decoder here develops Fujifilm raw at 8 bits per channel by default and the converter does not override it, so every frame is 8-bit true colour. That is plenty for playback and matches what browsers render anyway, but it means an APNG from this page is not an archival-depth master. Keep the .raf files.

Will the animation play in Chrome, Safari and Edge?

Yes. Chrome 59+, Firefox 3+, Safari 8+, Edge 79+ and Opera 46+ all play APNG natively, which caniuse currently puts at roughly 96% of users. Where it is not supported the file degrades gracefully rather than breaking: viewers see the first frame as an ordinary still PNG. Internet Explorer and Opera Mini are the notable exceptions.

Can I get one APNG per RAF instead of one combined animation?

Yes — switch Combine from "Single animation" to "Individual files" and each raw is processed on its own. Since a single image cannot animate, each of those outputs is a static PNG under an .apng name. If that is what you actually want, RAF to PNG is the more honest route.

How do I control the file size if there is no quality setting?

Two levers, in order of effectiveness. First, resolution: set Preset Resolutions or Width x Height under Image resolution, since halving the long edge removes about three quarters of the pixels in every frame. Second, frame count: upload fewer raws. An APNG is a lossless stack of frames, so its size is roughly linear in frames × pixels.

Does the APNG keep my EXIF data and Film Simulation?

No. The frames are re-rendered and re-assembled, so shooting metadata does not travel into the animation, and the Film Simulation recorded in the RAF is a rendering instruction rather than baked pixels — a general-purpose raw decode produces a neutral render instead of reproducing Velvia or Acros exactly. Develop in Fujifilm's own software first if a specific simulation is essential.

How are my raw files handled while they are being converted?

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. If you want the same sequence as a real video file rather than an animated image, RAF to MP4 gives you a slideshow instead, and the RAF converter hub lists every other target.