Most RAW converters upload your file to a server. Rawnd doesn't — the decoder is WebAssembly inside the page, so photos never leave your machine. Works offline as a PWA — nothing to install to try it, open a sample RAW from the landing page. Built with a Rust decoder compiled to wasm32, one WebGL2 shader for tone and color, and a GPU pass that measures chromatic aberration before any color processing touches the sensor data. Sort and develop a shoot, then export XMP sidecars into Lightroom.
Hey Product Hunt 👋
I'm Matthieu, solo dev. Rawnd is a RAW photo editor that runs entirely in the browser — no install, and more importantly, no upload. The RAW decoder is a WebAssembly module that ships in the page; your photos never touch a server.
A bit of the "how": decoding is a patched fork of the Rust rawler crate compiled to wasm32, rendering is a single WebGL2 fragment shader, and edits live in IndexedDB so the app works fully offline once installed as a PWA.
Some things I'm proud of finding and fixing along the way — because RAW editing lives and dies on details nobody notices until they're wrong:
The tone panel used to be a simple levels remap: lifting "Blacks" moved the entire image by up to 14 points of display brightness instead of just the shadows. Rewrote it as four independently-bounded tonal zones after a user comparison against Capture One caught it.
Chromatic aberration correction has an auto-measure pass that samples raw sensor data before any color matrix is applied — sampling after would have diluted exactly the signal it's trying to find.
What it's good for today: sorting and developing a shoot, then exporting XMP sidecars straight into Lightroom or Capture One — Rawnd isn't trying to replace your existing workflow, just remove the "do I have my laptop" friction from the first pass.
What it's honestly not good for yet: no camera color profiles, no defringe, no batch AI culling (that's next). I'd rather ship it early and be straight about the gaps than pretend they don't exist.
Free tier is unlimited for sorting, developing, and single exports. There's a 69 $ lifetime Founder deal for the first 200 people — after that, or if you'd rather not commit upfront, Pro is 6 $/month for batch export.
Would love feedback, especially from anyone shooting Fuji X-Trans or working off a Chromebook — that's exactly the "nothing to install" case this is built for.