Extract text from Nikon tone curve files (NTC)
To convert NTC tone curves to another format, you need Nikon Capture or other Settings software.
To convert other file formats to the "Camera Tone Curve File" file type, you need software like Nikon Capture or a similar tool.
The .NTC file is a proprietary Nikon Tone Curve settings file. Created and used primarily by Nikon Capture and Camera Control Pro, these files store custom image tone compensation data. Photographers generate these files to apply consistent brightness, contrast, and tonal mapping across multiple photographs.
The main disadvantage of the .NTC format is its strict software lock-in. It is a proprietary, closed file type. You cannot natively load .NTC files into modern, industry-standard post-processing tools like Adobe Lightroom, Adobe Photoshop, or Capture One. If you no longer have access to outdated Nikon utility software, your saved tonal curves become entirely inaccessible. Furthermore, standard online converters fail to process it because Nikon has never published the technical specifications of the file.
Photographers usually need to convert .NTC data into universal grading formats, such as ACV (Photoshop Curve) or CUBE (3D LUT). Because direct conversion is exceptionally difficult, the most realistic workaround is applying the .NTC curve to a NEF raw file within Nikon's software, and then using a third-party tool to extract the color shift into a standard LUT.
This file format is notoriously difficult to open or convert because only the original software can properly parse the proprietary curve points. However, just drag and drop your file to identify the format, view it, and convert it when possible using convert.guru. Even if full conversion fails, our analysis can inspect the file, reveal readable internal strings, and help you salvage embedded metadata.
Convert.Guru analyzes your NTC file, detects the exact format, and lets you read the text inside.
Users also converted C2, HPT and GRG files.
If you want to convert NTC file to TMP, TEMP, CACHE, LOG, BAK, OLD, NEW, PART, DOWNLOAD, CRDOWNLOAD, LOCK or PID, you can use Nikon Capture or similar software from the "Image Tone Curve Adjustments" category. In the File menu, look for Save As… or Export….
To convert DEVICE, CACHE, SOCK, SYMLINK, PID, MOUNT, FIFO, LOG, PIPE, TMP, JUNCTION or TEMP files to NTC, try Nikon Capture or another comparable tool in the "Image Tone Curve Adjustments" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our NTC converter.