JP2 to TGA Converter
Convert JP2 to TGA in your browser. JP2 files usually come from libraries and digital archives, medical (DICOM) and satellite imaging, and digital cinema packages; TGA is the better fit for game textures and 3D software. You get a run-length encoded 32-bit TGA with alpha. Nothing is uploaded.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
JP2 expected · other image formats also work
How to use JP2 to TGA
- 1
Add your JP2 files: drop them here, choose them, or paste from the clipboard.
- 2
There is nothing to tune: the TGA is written losslessly. Resizing and rotating are under More options if you need them.
- 3
Click Convert. Each file is decoded and encoded in a background thread on this device.
- 4
Download the .tga files one at a time or together as a ZIP.
Why use Aback Images for jp2 to tga
Where the TGA goes next
TGA opens in Unreal Engine, Unity, Blender, Photoshop, GIMP and Substance tools.
TGA next to JP2
Both sides are lossless, so the size depends on how well the TGA encoder handles this picture compared with the JP2's wavelet coding: reversible 5/3 for lossless files, irreversible 9/7 for lossy ones.
Written without a lossy pass
The TGA is written losslessly, so the pixels decoded from the JP2 arrive unchanged, apart from precision beyond 8 bits per channel.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
JP2 vs TGA
What changes from JP2 to TGA
Encoding: the JP2 uses wavelet coding: reversible 5/3 for lossless files, irreversible 9/7 for lossy ones; TGA uses uncompressed or run-length encoded (RLE), and the download is a run-length encoded 32-bit TGA with alpha.
Bit depth: up to 16 bits per channel is common, more is possible in the JP2; TGA allows 8, 15, 16, 24 or 32 bits per pixel, and the TGA written here has 32 bits per pixel. 12 and 16-bit JPEG 2000 files are reduced to 8 bits per channel.
Colour: sRGB, greyscale, YCC or a space described by an ICC profile in the JP2; TGA supports RGB, greyscale or a colour map, written here as 8-bit sRGB.
Transparency: the JP2 stores it as an extra component flagged as opacity; the TGA keeps it as the fourth byte of each 32-bit pixel (or one bit in 16-bit files).
Metadata: the JP2 can carry XML, ICC and resolution boxes; TGA can carry an image ID field and an optional extension area with author and date, but nothing is copied across.
About JP2
JPEG 2000 is a wavelet-based format that can be truly lossless or lossy, handles very high bit depths and huge images, and is used where long-term fidelity matters: archives, medicine, satellites and digital cinema.
A .jp2 file is a box structure: a 12-byte signature box, an 'ftyp' box, a 'jp2h' header box with the size and colour specification, then the 'jp2c' box holding the codestream, which begins with FF 4F FF 51.
JP2 files usually come from libraries and digital archives, medical (DICOM) and satellite imaging, and digital cinema packages.
About TGA
TGA is a simple raster format still widely used for game textures and 3D rendering pipelines because it stores alpha channels reliably and loads fast.
A TGA has an 18-byte header (ID length, colour map type, image type 2 for true colour or 10 for RLE, origin, size, bits per pixel and a descriptor byte whose bits give the alpha depth and whether rows run top-down), then the pixels; version 2 files end with a 'TRUEVISION-XFILE' footer.
When converting JP2 to TGA makes sense
TGA is the better choice for game textures and 3D software, while JP2 suits archival masters and specialist imaging.
TGA strengths: Reliable alpha channel; Fast and simple to load; Common in game engines. Drawbacks to weigh: Large files; Not viewable in browsers.
Limitations
- A JPEG 2000 file may be a lossless master or a lossy derivative; the file does not tell you which at a glance, so keep the original either way.
- Archival scans can be tens of thousands of pixels across, and decoding them needs a lot of memory on a phone.
- The run-length encoding used here is lossless, and game engines read compressed and uncompressed TGA alike.
- TGA files do not open in browsers, so keep a PNG for previews.
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Frequently asked questions
Does converting JP2 to TGA lose quality?
TGA is written losslessly, so the pixels are stored exactly as decoded. 12 and 16-bit JPEG 2000 files are reduced to 8 bits per channel.
Is transparency kept in the TGA?
Yes. JP2 stores it as an extra component flagged as opacity, and the TGA is written with an alpha channel, so transparent areas stay transparent.
Which apps open TGA files?
Unreal Engine, Unity, Blender, Photoshop, GIMP and Substance tools. It does not open in web browsers.
Are my images uploaded anywhere?
No. Processing happens inside your browser with WebAssembly and Web Workers. The site only downloads the app code and codecs; your files never leave your device. You can confirm this with the live upload counter on the tool, or in your browser's network panel.
Can I process many files at once?
Yes. Drop a whole selection or folder. Files are processed in parallel on several worker threads, each result can be downloaded on its own, and everything can be saved as one ZIP.
Is it free? Is there a file limit or watermark?
It is free with no account, no watermark and no daily limit. The only limit is your device's memory: very large images (over roughly 100 megapixels) may be refused to keep the tab from crashing.