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How to edit RAW photos in a free desktop app with Rembrandt

Install a free RAW editor with masks and AI tools and skip the subscription.

  • Content
  • Beginner
  • 15 minutes
  • From the README
  • Any agent

Who it is forA photographer who wants a capable RAW editor on a desktop or laptop and does not want a monthly fee or an account.

The problemPaid editors charge a subscription and require an account, and many free tools lack RAW development, masks or lens corrections.

The outcomeYou develop RAW files from over 1,000 cameras, adjust them with masks and AI-based looks, and export JPEG, PNG, WebP or TIFF files.

What you need first

  • A computer running macOS, Windows or Linux with a photo folder you want to edit
  • A terminal for the Linux and self-host install commands
  • A GPU with WebGL 2 support is helpful; the README says older graphics cards are supported at reduced working size
  • Permission to open unsigned builds (System Settings › Privacy & Security › Open Anyway on macOS, More info › Run anyway on Windows)

Steps

  1. Download the installer for your system from the Download table: the macOS .dmg for Apple silicon or Intel, the Windows setup .exe for x64 or ARM, or run the Linux command.
  2. On Linux, run curl -fsSL https://raw.githubusercontent.com/thesnarkitecht/rembrandt/main/install.sh | bash
  3. Open the app. If macOS or Windows blocks it because builds are not yet code-signed, use Open Anyway on macOS or More info then Run anyway on Windows.
  4. Import a folder of RAW photos, then adjust tone, colour and masks. Edits are non-destructive.
  5. Export a finished photo to JPEG, PNG, WebP or TIFF and check the exported file opens with your camera details intact.

Prompt for your agent

Using the repo thesnarkitecht/rembrandt, download the installer for <platform> from the project's Releases page and confirm the file's SHA-256 matches the published checksum. Report the file name and whether the checksum matched.

Caveat. Builds are not code-signed yet, so your operating system will ask you to confirm the first launch.

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