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Guide

A free Lightroom alternative that runs in your browser

LightCraft is an open-source, clean-room rebuild of Adobe Lightroom’s photo library and raw development, and its web build runs in a browser tab with nothing to install. It is free and in alpha: strong on the core develop tools, still behind on camera colour, lens profiles and AI.

What works the way you expect

LightCraft follows Lightroom’s layout and shortcuts, so most habits carry over:

In LightroomIn LightCraftKey
Library gridPhoto Grid and Square GridG
Loupe viewDetailD
Develop / Edit panelEdit: Light, Color, Effects, Detail, Optics, GeometryE
Crop & StraightenCrop, with Auto straighten and UprightC
MaskingMasking: brush, gradients, ranges, sky, subject, backgroundM
PresetsPresets panel, Amount 0–200%Shift+P
Before / afterBefore and After, side by side or splitY, Shift+Y
Show originalShow Original\
Auto SettingsAuto SettingsShift+A
ExportFile › Export…⌘⇧E / Ctrl+Shift+E

Under the panels: the full set of global sliders, a tone curve with parametric regions and RGB point curves, an 8-band Color Mixer, colour grading wheels, B&W mix, sharpening and noise reduction, spot removal and red eye, and virtual copies, stacks and smart albums in the library. Ratings use 0–5, flags P, X and U, and colour labels 6–9, as in Lightroom.

LightCraft’s Masking panel with a linear Sky mask and a radial Sun glow mask over a lake scene
A radial “Sun glow” mask over a linear “Sky” mask. Screenshot from the LightCraft project, demo library photo.

Where it is still behind

LightCraft’s developers publish their own scorecard. As of this release they put it at about 81% of Lightroom’s features by count, and around 61% as a day-to-day replacement. The biggest gaps they list:

If you shoot JPEG or DNG, or a recent Sony, Panasonic, Fujifilm, Nikon or older Canon body, it is already a capable editor. Check your camera on the RAW formats list.

Browser version or desktop app?

Browser (this site)Desktop app
InstallNone; about 20 MB on first visitWindows, macOS, Linux, FreeBSD
Where photos liveCopies in your browser’s storageA library folder; originals referenced in place or copied
RenderingProcessor, in background workersGraphics card (Metal, Vulkan, DX12), processor as fallback
Lightroom catalog importNot yetYes
XMP sidecars, preset filesNot yetYes
AI agents (MCP)NoYes, see LightCraft MCP
AI on your own keyYes, the AI panelNo panel; use MCP with an agent

The browser build is the quickest way to try LightCraft or edit a handful of photos on any computer. For your whole archive, download the desktop app.

FAQ

Is LightCraft really free?

Yes. It is open source under the MIT or Apache-2.0 licence, with no subscription, account or watermark. The browser version on this site is free too; only the optional AI panel costs money, billed by the AI provider whose key you use.

Can I bring my Lightroom catalog over?

In the desktop app, yes: File › Import Lightroom Catalog… reads a Lightroom Classic .lrcat and brings ratings, flags, labels, keywords, collections, virtual copies and mapped develop settings. The browser version can’t read a catalog file yet.

Will my Lightroom edits look the same?

Close, not identical. Supported sliders, curves and masks carry over and stay editable, but Adobe’s camera profiles, AI masks and some retouch settings are not reproduced, so expect to fine-tune colour.

Does LightCraft sync between devices like Lightroom does?

No. LightCraft is local-first: no account, no cloud. In the browser, the library lives in that browser; File › Back Up Library… and Restore move it to another browser or computer.

Adobe and Lightroom are trademarks of Adobe Inc. LightCraft and this site are not affiliated with Adobe.

Try it on your own photos

Nothing to install, and your library stays in your browser.

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