Free RAW Photo Library — Develop Without Uploading
A photo library with non-destructive RAW development, in your browser: organize your whole collection, then adjust exposure, white balance, and tone on RAW camera files — while the originals stay untouched. A free Lightroom alternative that never uploads a single photo.
LightCraft
A photo library with non-destructive RAW development — like Lightroom, in your browser.
First launch downloads ≈63 MB, then it's cached for a year. Nothing is uploaded — your files stay on this device.
Large download — best on a fast connection.
This is a desktop-class app — it works best on a larger screen.
Quick Answer
This free photo library combines two jobs: organizing your photo collection and developing RAW camera files non-destructively. Adjustments — exposure, white balance, tone, color grading — are stored as edits on top of the original, which is never modified. It is a Lightroom-style workflow that runs entirely in your browser as WebAssembly: photos are read from your device and never uploaded.
How It Works
Click Launch — the app downloads once (about 63 MB on first load) and is cached for a year
Point it at your photo folders to build the library
Browse, organize, and rate your collection
Develop RAW files with non-destructive adjustments, then export finished images
Key Facts
- Photo library organization for your whole collection
- Non-destructive RAW development — originals are never modified
- Exposure, white balance, tone, and color grading controls
- Handles camera RAW formats alongside JPG and PNG
- Edits stored as adjustments; reset or refine anytime
- Photos never leave your device — no upload, no cloud
- Large first download (about 63 MB), cached for a year after
Frequently Asked Questions
What does non-destructive editing actually mean?
Your adjustments are stored as a recipe on top of the photo, and the original file — especially a RAW file — is never rewritten. Change your mind next week about the white balance and the edit simply recalculates from the untouched original. That is the same model Lightroom uses, and it is why catalog-style apps feel safe for archival work.
Are my photos uploaded to a cloud library?
No. This is LightCraft, an open-source application that runs as WebAssembly in your browser. It reads photos from your device, stores its catalog and adjustments locally, and exports locally. There is no cloud sync, no server copy, and no account — your photo collection stays entirely yours.
Which RAW formats does it support?
It handles camera RAW formats from the major manufacturers (CR2/CR3, NEF, ARW, DNG and friends) alongside standard JPG, PNG, and WebP images. For a one-off conversion of a single RAW file to JPG, the dedicated converters on this site are faster; for developing and organizing a shoot, this is the tool.
Why is the first launch download so large?
About 63 MB — it is a complete RAW development engine with decoders for many camera formats, compiled to WebAssembly. The download happens once and is then cached for a year, so day-to-day use starts almost instantly. It is worth it on a fast connection; on slow links, plan the first launch ahead.
How is it different from the Photo Editor in this studio?
The Photo Editor is for working deeply on one image — layers, masks, retouching, composites. This is for the collection: browse and organize everything you shot, apply consistent non-destructive adjustments across many photos, and export in batches. Photographers typically use both — library here, heavy retouch there.