Convert OTA files online for free
The converter easily converts your OTA file to various formats - free and online. No Photoshop or extra software needed.
The converter also works in reverse, so you can convert other System formats to OTA with high quality output.
The .OTA extension represents a collision between legacy mobile graphics and modern system architecture, serving two completely distinct purposes. Most historically, it refers to the Nokia Over-the-Air bitmap, a proprietary monochrome (1-bit) raster format used for sending Picture Messages and Operator Logos in the early 2000s. These files are now effectively obsolete data artifacts; they cannot be opened by modern web browsers, operating systems, or standard image viewers like Microsoft Photos, leaving users unable to view archived pixel art without specialized conversion.
Alternatively, in a modern context, an .OTA file is a firmware update package for devices ranging from Android smartphones to Zigbee IoT sensors and Hollyland wireless transmitters. For Android and Amazon Fire OS, these are often just standard ZIP or TAR archives renamed to prevent user tampering. The primary difficulty here is opacity: users cannot double-click to verify the update's contents or check the updater-script for compatibility. These files can be massive, often exceeding 1GB, and attempting to open them in a text editor will crash the application.
For the legacy Nokia images, the only practical solution is converting them to standard PNG or JPG formats to preserve the visual content. For Android-based firmware, the file should be treated as an archive; converting (or simply renaming) it to ZIP allows for extraction and inspection of the manifest. For proprietary binary firmware (like Zigbee or Owon oscilloscope data), the file is generally meant for machine consumption only, though developers may convert it to Hex Dump text files for debugging header information.
Use Convert.Guru to open and convert your OTA file.
Users also converted ZIP, ODT, IMG, JPG, PDF, RAR, BIN, DCX, CAL, PI2 and IPSW files.
If you want to convert OTA file to IPSW, IMG, JPG, PDF, PNG, GIF, BMP, TIFF, TIF, WEBP, ICO or CUR, you can use Android System Update or similar software from the "Firmware Update Package" category. In the File menu, look for Save As… or Export….
To convert RAW, PNG, AI, NEF, PSB, DNG, SVG, GIF, EPS, JPG, ARW or PDF files to OTA, try Android System Update or another comparable tool in the "Firmware Update Package" 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 OTA converter.