Click the "Select File" button above, and choose your UNF file.
You’ll see a preview, if available.
Click the "Convert file to..." button to extract text information.
Convert UNF to another file type
To convert your UNF file to another format, you need FCEUX or other Game software.
Convert a file to UNF
To convert other file formats to the "ROM Image" file type, you need software like FCEUX or a similar tool.
About UNF files
A UNIF file is a Universal NES Image Format ROM, a specialized container designed by the emulation community to preserve Nintendo Entertainment System games that the standard NES (iNES) format could not handle. Unlike the rigid iNES header, UNIF utilizes a flexible, chunk-based structure (similar to RIFF) to accurately describe the complex circuit boards found in unlicensed games, pirate multicarts, and rare hardware configurations.
While technically superior for preservation, UNIF files create significant friction for modern retro-gamers. The primary disadvantage is hardware compatibility; popular flashcarts like the Krikzz EverDrive and FPGA consoles like the Analogue Nt often refuse to load UNIF files, requiring standard NES headers instead. Additionally, because the newer iNES 2.0 standard now supports these complex attributes, UNIF has become somewhat obsolete, leading to dropped support in some lightweight emulators.
To ensure your game dumps are playable across all devices:
For Flashcarts & Hardware: Convert UNIF to NES (specifically utilizing the iNES 2.0 header) to ensure the game loads on real hardware.
For Archiving: Convert to ZIP or 7Z to compress the ROM data without modifying the internal board descriptions.
Convert.Guru analyzes your UNF file, detects the exact format, and lets you read the text inside.
If you want to convert UNF file to NES, EXE, ISO, BIN, CUE, PAK, WAD, PK3, PK4, BSP, MAP or SAV, you can use FCEUX or similar software from the "NES ROM Image" category. In the File menu, look for Save As… or Export….
To convert MOD, BIN, CFG, SCX, DAT, MPQ, LOG, CUE, INI, EXE, SCM or ISO files to UNF, try FCEUX or another comparable tool in the "NES ROM Image" category.
The UNF Converter Story
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 UNF converter.