TGA to JP2 Converter
Convert TGA to JP2 in your browser. TGA files usually come from game engines, 3D renderers and texture painting tools; JP2 is the better fit for archival masters and specialist imaging. You get a lossless JPEG 2000 (.jp2) using the reversible 5/3 wavelet. Nothing is uploaded.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
TGA expected · other image formats also work
How to use TGA to JP2
- 1
Add your TGA files: drop them here, choose them, or paste from the clipboard.
- 2
There is nothing to tune: the JP2 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 .jp2 files one at a time or together as a ZIP.
Why use Aback Images for tga to jp2
Where the JP2 goes next
JP2 opens in macOS Preview, GIMP, IrfanView, XnView, ImageMagick and the OpenJPEG tools.
JP2 next to TGA
Both sides are lossless, so the size depends on how well the JP2 encoder handles this picture compared with the TGA's uncompressed or run-length encoded (RLE).
Written without a lossy pass
The JP2 is written losslessly, so the pixels decoded from the TGA arrive unchanged.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
TGA vs JP2
What changes from TGA to JP2
Encoding: the TGA uses uncompressed or run-length encoded (RLE); JP2 uses wavelet coding: reversible 5/3 for lossless files, irreversible 9/7 for lossy ones, and the download is a lossless JPEG 2000 (.jp2) using the reversible 5/3 wavelet.
Bit depth: 8, 15, 16, 24 or 32 bits per pixel in the TGA; JP2 allows up to 16 bits per channel is common, more is possible, and the JP2 written here has 8 bits per channel.
Colour: RGB, greyscale or a colour map in the TGA; JP2 supports sRGB, greyscale, YCC or a space described by an ICC profile, written here as 8-bit sRGB.
Transparency: the TGA stores it as the fourth byte of each 32-bit pixel (or one bit in 16-bit files); the JP2 keeps it as an extra component flagged as opacity.
Metadata: the TGA can carry an image ID field and an optional extension area with author and date; JP2 can carry XML, ICC and resolution boxes, but nothing is copied across.
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.
TGA files usually come from game engines, 3D renderers and texture painting tools.
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.
When converting TGA to JP2 makes sense
JP2 is the better choice for archival masters and specialist imaging, while TGA suits game textures and 3D software.
JP2 strengths: True lossless mode; High bit depths and very large images; Standardised for archives and digital cinema. Drawbacks to weigh: Browsers do not display it; Slow to encode and decode; Patchy support in everyday apps.
Limitations
- Some writers store rows bottom-up and some top-down; the descriptor byte says which, and the decoder follows it, so orientation is preserved.
- Lossless JPEG 2000 is larger than a lossy one, but usually smaller than an uncompressed TIFF of the same pixels.
- No current browser displays JP2 by default; archive and imaging software opens it.
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Frequently asked questions
Does converting TGA to JP2 lose quality?
JP2 is written losslessly, so the pixels are stored exactly as decoded.
Is transparency kept in the JP2?
Yes. TGA stores it as the fourth byte of each 32-bit pixel (or one bit in 16-bit files), and the JP2 is written with an alpha channel, so transparent areas stay transparent.
Is the JPEG 2000 file lossless?
Yes. It is written with JPEG 2000's reversible 5/3 wavelet, so decoding it gives back exactly the pixels that went in. The trade-off is size: a lossless JP2 is larger than a lossy one, though usually smaller than an uncompressed TIFF.
Which apps open JP2 files?
MacOS Preview, GIMP, IrfanView, XnView, ImageMagick and the OpenJPEG tools. It does not open in web browsers by default.
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.