Reverse LUT Generator:
Flatten Graded Images to Log
Remove LUTs and undo color grading from standard JPEG, PNG, or WebP photos using our 100% free online Reverse LUT generator. Our GPU-accelerated client-side log conversion tool mathematically decompresses Rec709 to Log signals, restores flat color profiles, and lifts shadows—creating a flat image generator curve equivalent to ARRI LogC, Sony S-Log3, or Cineon flat profiles.
100% Secure & Client-Side: No server uploads and no data collection. All core math calculations run directly inside your browser's local sandbox, preserving the absolute privacy and original quality of your photography.
Upload a photo or drag here
PNG, JPEG, WebP or paste (Ctrl+V)
Or select a sample photography
How Our Reverse LUT Inversion Works
Standard images contain baked-in contrast curves intended for display screens. Our client-side GPU engine runs five sequential operations to invert this mapping.
Signal Import
Import standard PNG, JPG, or WebP files. Image channels are decoded inside the browser's IndexedDB memory sandbox.
Gamma Decoupling
Reverse the non-linear sRGB gamma curve (2.2) to return pixel channels to scene-referred linear light values.
Inverse Mapping
Decompress highlight regions and expand mid-tones using scientific inverse mathematical formulas.
Log Encoding
Re-map the linear light data onto target profiles like Sony S-Log3, Canon C-Log, Panasonic V-Log, or RED Log3G10.
Lossless Export
Export the flattened intermediate image as a high-bitrate file ready for DaVinci Resolve or Premiere.
Use Cases for Professional Creators
Reversing Look-Up Tables and creating flat logarithmic digital intermediates serves crucial functions across visual pipelines.
Photographers
Un-bake high-contrast JPEGs by extending shadow margins and pulling back contrast, mimicking raw-like latitude and flexibility when adjusting exposure in Photoshop or Lightroom.
Creators
Establish a consistent visual signature. Convert standard graphics, stock imagery, or overlays into flat formats, allowing custom color grades and atmospheric LUTs to apply uniformly.
Beginners Phone Shoots
Learn color grading without expensive cinema gear. Convert high-contrast phone videos (iPhone/Android) into flat log-like profiles. Practice custom styling, color balancing, and applying LUTs.
Colorists
Perform precise color space reconstruction. By inverting display gamma curves, colorists can build custom nodes that prevent highlight clipping and protect skin tones in Rec.709 elements.
Resolve Users
Resolve color matching issues instantly. Integrate standard stock assets directly into ACES or RCM wide-gamut timelines by applying flat curves that simulate professional camera-native log feeds.
Frequently Asked Questions
Technical and practical insights into Reverse LUTs, AI color science, and profile un-baking.
What is a Reverse LUT?
A Reverse LUT (Look-Up Table) is a mathematical color space transformation designed to invert color adjustments. It works in opposition to display LUTs by reversing display-referred gamma mapping and converting standard images back into low-contrast, flat logarithmic formats.
How does an AI Reverse LUT assist in color reconstruction?
While standard math can invert exposure curves, it cannot recover details in clipped whites or crushed blacks. An AI Reverse LUT analyzes color gradients and boundaries, using intelligent color science to reconstruct dynamic range and prevent digital artifacts.
Why would I want to convert sRGB to Sony S-Log3?
If you are editing B-roll, drone shots, or smartphone footage on a project shot on Sony cameras, converting sRGB to Sony S-Log3 allows you to integrate all assets into the same timeline, ensuring consistent response to creative grading LUTs.
What is Inverse Technical Mapping?
Inverse Technical Mapping mathematically reverses the display-referred encoding transforms applied by cameras and display standards, decompressing highlight and shadow areas back to scene-referred values.
How does sRGB Gamma Correction reversal work?
It executes the inverse piecewise sRGB function, dividing values below 0.04045 by 12.92, and raising larger values to the power of 2.4, effectively stripping the 2.2 display gamma to recover linear light values.
What is un-baking a camera profile?
Un-baking strips standard compressed media of pre-applied camera contrast, saturation, and sharpening, flattening the signal back to an emulation of raw digital negatives.
How do I resolve invert LUT issues in DaVinci Resolve?
Issues usually stem from mismatched color space nodes. Ensure your node pipeline utilizes Color Space Transforms (CST) to align input gamuts before attempting 3D LUT inversions.
Is there a LUT Reverse Python library I can use?
Yes, developers write custom Python code using NumPy and SciPy to process 3D .cube LUT arrays and perform trilinear interpolation to reverse coordinates programmatically.
What camera profiles are supported by this log profile emulator?
Our converter features presets for Sony S-Log3, Sony S-Log2, Canon C-Log, Panasonic V-Log, DJI D-Log, Blackmagic Film, Fujifilm F-Log, and RED Log3G10 curves.
What is the difference between a Reverse LUT and an AI LUT Generator?
A Reverse LUT is a fixed mathematical color space transform. An AI LUT Generator parses the stylistic features of an image and generates a creative grade based on aesthetic model training.
Can I convert photos directly to log for editing in Photoshop?
Yes. Inverting high-contrast JPEGs into low-contrast log files gives you a flat starting point for editing curves and colors using Adobe Camera Raw or Lightroom.
Does this tool upload my images to a server?
No. All processing is executed 100% client-side in your local browser sandbox. Your images never leave your machine, ensuring complete privacy.
Is there any quality degradation when reversing sRGB?
Reversing gamma curves decompresses compressed data values. While it cannot restore clipped data, it utilizes high-precision float values to prevent adding digital noise.
What file formats are supported?
The tool imports standard PNG, JPEG, WebP, and supports direct clipboard pasting. You can export results in high-quality PNG or high-bitrate JPEG formats.
Does this tool support batch conversions?
Yes. You can upload multiple files to the workspace, manage them inside your local IndexedDB gallery, adjust individual sliders, and export files one by one.