Introduction — What is LUTScope?
LUTScope is a macOS app that streamlines the color grading workflow for filmmakers. Browse hundreds of LUTs at a glance, preview them through a 2-stage pipeline of Input LUT (camera Log conversion) and Look LUT (creative grade), and quickly find the best look for your footage.
Key Features
- 2-Stage LUT Pipeline: Input LUT → Look LUT applied in sequence. Separates Log conversion from creative grading
- 20-Slot Comparison: Register LUT combinations in slots A–T and compare at a glance
- 3 Favorite Types + Titling: Combination favorites (red heart + custom title), Input LUT favorites (yellow), Look LUT favorites (yellow)
- Favorite Section: Dedicated sidebar panel for browsing, searching, and quick access to favorites
- 1D / 3D LUT Support:
.cube format for both 1D and 3D LUTs (1D is auto-baked to 3D)
- Synced Video Playback: All slots play in real-time sync (±15 s range centered on the selected frame, 30 Hz, loop)
- Metal GPU Rendering: Hardware-accelerated preview
- Anamorphic Desqueeze: 1.0x–2.0x in 7 steps
- LUT Summary Package Export: Bundle LUT files + preview images from favorites or slots
- 8 Languages: Japanese / English / German / French / Spanish / Portuguese / Chinese / System
- License Activation: Supports both online and offline license activation
| Item |
Details |
| Supported OS |
macOS only (not available on iOS) |
| Rendering |
Core Image + Metal GPU acceleration |
| LUT Format |
.cube (1D / 3D) |
| License |
Online activation or offline activation |
Interface Overview
The LUTScope interface consists of three areas in the main window and dedicated sub-windows for specific tasks.
Main Window Layout (3 Areas)
| Area |
Position |
Description |
| LUT Sidebar |
Left |
LUT folder tree, search, favorite filters, Favorite Section |
| Thumbnail Strip |
Top-right |
Video/still image import, frame extraction |
| LUT Grid |
Bottom-right |
Grid view of LUT-applied results, selection & comparison |
Sub-Windows
| Window |
Description |
| Compare Window |
Compare assigned slots (Grid / Side by Side / Slider) |
| Preview Window |
Single LUT large preview (Look intensity 0–200%) |
| Settings Window |
UI, rendering, and language settings |
| License Window |
License activation & management |
License Activation
LUTScope requires license activation. There are two methods: online activation (enter a license key) and offline activation. Licenses are tied to a specific device and major version.
Opening the License Window
Menu bar > LUTScope > License...
Online Activation Steps
- Select License... from the menu bar to open the License window
- Enter your license key in the “License Key” field (format:
XXXX-XXXX-XXXX-XXXX)
- Click the Activate button
- The app communicates with the authentication server
- On success: the status changes to “Activated (Online)” and is displayed in green
- Authentication data is securely stored in the Keychain
Post-Activation Display
- Status: “Activated (Online)” (green)
- License Key: Only the last 4 digits are shown (masked)
- Product Info: Product name
- Issue Date: License issuance timestamp
Error Messages
| Error |
Description |
| Invalid license key |
The license key is incorrect |
| License is revoked |
The license has been revoked |
| Bundle ID mismatch |
The application does not match the license |
| Version mismatch |
The license does not support this version |
| Maximum devices reached |
The device limit for this license has been reached |
| Server error |
Server error. Please try again later |
Removing a License
- Click the Remove Local License Data button in the License window
- Local authentication data will be deleted
Technical Details
- Device Binding: Tied to the macOS hardware UUID
- Version Binding: A license is required per major version
- RSA Signature Verification: Authentication data is verified with RSA-PSS-SHA256 signatures
- Automatic Verification on Launch: Local authentication data is automatically verified at app startup
