About Filmroll
Filmroll is a modern photo-sharing app that keeps your photos in true HDR. Create a gallery, upload from your phone or camera, and share a private link — viewers see every highlight and shadow in real HDR on supported screens, with an automatic SDR fallback everywhere else.
Frequently asked questions
What is Filmroll?
Filmroll is a modern photo-sharing app. Create a gallery, upload your photos, and share a private link — your shots display in true HDR on supported screens (with an automatic SDR fallback everywhere else), so every highlight and shadow comes through. Support for 360° panoramas is coming soon.
Which photo formats can I upload?
JPEG, Apple HEIC, and DNG (including iPhone ProRAW). Modern iPhones shoot HEIC with HDR built in, but browsers can't display it directly — so Filmroll converts HEIC and DNG to an ISO 21496-1 Ultra HDR gain-map JPEG, an HDR format today's browsers can actually show, and keeps your untouched original file for download.
What is Ultra HDR?
Ultra HDR (ISO 21496-1) is a JPEG that carries a normal image plus a 'gain map' of the extra highlight detail. A gain-map JPEG is currently the only HDR image format today's web browsers widely support, so it shows full HDR on capable displays and falls back cleanly to SDR everywhere else. As newer formats like JPEG XL gain browser support, we'll adopt them to take advantage.
Are my galleries private?
Yes. Each gallery has a random, unguessable link, and that link is the only way to reach it. Galleries are never listed publicly or indexed by search engines, and you can create revocable, time-limited view or collaborator links.
Do viewers need an account or app?
No. Anyone with a gallery link can view it in their browser — no account, no app, no install. Only creating a gallery requires signing in.