JP2 to PSD Converter
Convert JP2 to PSD in your browser. JP2 files usually come from libraries and digital archives, medical (DICOM) and satellite imaging, and digital cinema packages; PSD is the better fit for editing in Photoshop. You get an 8-bit RGB Photoshop document with one layer and a merged composite, RLE compressed, with transparency kept. 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 PSD
- 1
Add your JP2 files: drop them here, choose them, or paste from the clipboard.
- 2
There is nothing to tune: the PSD 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 .psd files one at a time or together as a ZIP.
Why use Aback Images for jp2 to psd
Where the PSD goes next
PSD opens in Photoshop, Affinity Photo, GIMP, Photopea and Krita.
PSD next to JP2
Both sides are lossless, so the size depends on how well the PSD 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 PSD 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 PSD
What changes from JP2 to PSD
Encoding: the JP2 uses wavelet coding: reversible 5/3 for lossless files, irreversible 9/7 for lossy ones; PSD uses raw or RLE (PackBits) channel data, ZIP in some 16 and 32-bit files, and the download is an 8-bit RGB Photoshop document with one layer and a merged composite, RLE compressed, with transparency kept.
Bit depth: up to 16 bits per channel is common, more is possible in the JP2; PSD allows 8, 16 or 32 bits per channel, and the PSD written here has 8 bits per channel. 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; PSD supports RGB, CMYK, Lab, greyscale, indexed or multichannel, written here as 8-bit sRGB.
Transparency: the JP2 stores it as an extra component flagged as opacity; the PSD keeps it as transparent layers plus extra alpha channels.
Metadata: the JP2 can carry XML, ICC and resolution boxes; PSD can carry XMP, EXIF, IPTC and ICC in image resource blocks, 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 PSD
PSD is Adobe Photoshop's layered working format. It keeps layers, masks and effects, but almost nothing outside Photoshop can display it, so finished designs are exported to PNG or JPG.
A PSD has five sections: a header ('8BPS', channel count, size, depth, colour mode), colour mode data, image resources (thumbnail, ICC, XMP, resolution), layer and mask information, and finally the merged composite image that the Maximize Compatibility option saves.
When converting JP2 to PSD makes sense
PSD is the better choice for editing in Photoshop, while JP2 suits archival masters and specialist imaging.
PSD strengths: Keeps every layer and edit. Drawbacks to weigh: Huge files; Cannot be viewed on the web or most phones.
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 Photoshop document holds the picture as a single layer: a starting point for editing, not a reconstruction of layers.
- Photoshop, Affinity Photo, GIMP and Photopea open it.
More conversions
Related tools
Convert PSD to JP2 in your browser, stored as lossless JPEG 2000. Batch, private, no uploads.
Convert JP2 to JPG in your browser, with transparency filled in a colour you pick. Batch, private, no uploads.
Shrink JPG, PNG, WebP, AVIF and GIF files with MozJPEG, OxiPNG and modern codecs, with a live before/after preview.
Resize to exact pixels, a percentage or a longest side, with Lanczos3 and Magic Kernel resampling. Batch ready.
Strip EXIF, GPS, XMP, IPTC and comments losslessly. Pixels are never re-encoded for JPG, PNG and WebP.
Convert between 34 image formats in bulk: HEIC, WebP, AVIF, JPEG XL, PNG, JPG, GIF, TIFF, SVG, ICO, PSD, RAW and more.
Frequently asked questions
Does converting JP2 to PSD lose quality?
PSD 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 PSD?
Yes. JP2 stores it as an extra component flagged as opacity, and the PSD is written with an alpha channel, so transparent areas stay transparent.
Which apps open PSD files?
Photoshop, Affinity Photo, GIMP, Photopea and Krita. 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.