EXR to JP2 Converter
Convert EXR to JP2 in your browser. EXR files usually come from 3D renderers and compositing in Nuke, Blender, Houdini, After Effects and DaVinci Resolve; 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
EXR expected · other image formats also work
How to use EXR to JP2
- 1
Add your EXR 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 exr to jp2
Where the JP2 goes next
JP2 opens in macOS Preview, GIMP, IrfanView, XnView, ImageMagick and the OpenJPEG tools.
JP2 next to EXR
Both sides are lossless, so the size depends on how well the JP2 encoder handles this picture compared with the EXR's none, RLE, ZIP, PIZ, PXR24, B44 or DWA, chosen per file.
Written without a lossy pass
The JP2 is written losslessly, so the pixels decoded from the EXR 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.
EXR vs JP2
What changes from EXR to JP2
Encoding: the EXR uses none, RLE, ZIP, PIZ, PXR24, B44 or DWA, chosen per file; 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: 16-bit half or 32-bit floating point per channel in the EXR; JP2 allows up to 16 bits per channel is common, more is possible, and the JP2 written here has 8 bits per channel. Floating-point values are mapped to 8 bits per channel, and anything brighter than white clips.
Colour: scene-linear RGB, often ACEScg or linear Rec.709 in the EXR; JP2 supports sRGB, greyscale, YCC or a space described by an ICC profile, written here as 8-bit sRGB.
Transparency: the EXR stores it as an A channel stored like any other channel; the JP2 keeps it as an extra component flagged as opacity.
Other images: the EXR can hold extra channels (depth, normals, render passes) and multiple parts; only the main image is converted.
Metadata: the EXR can carry named header attributes such as chromaticities, timecode and camera data; JP2 can carry XML, ICC and resolution boxes, but nothing is copied across.
About EXR
OpenEXR is the high dynamic range format of film visual effects. It stores half or full floating-point channels in linear light, plus any extra render passes, and is the working format of compositing pipelines.
An EXR starts with the magic number 76 2F 31 01 and a version field, then a header of named, typed attributes (channels, compression, dataWindow, displayWindow) and a table of offsets to scanline or tile blocks.
EXR files usually come from 3D renderers and compositing in Nuke, Blender, Houdini, After Effects and DaVinci Resolve.
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 EXR to JP2 makes sense
JP2 is the better choice for archival masters and specialist imaging, while EXR suits visual effects, compositing and 3D render output.
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
- EXR values are scene-linear and can exceed 1.0; they are mapped to display values without tone mapping, so highlights clip to white.
- Only the colour channels are converted; depth, normals and other render passes are dropped.
- Single-part scanline files are supported; tiled, deep and multi-part EXRs, and those compressed with B44 or DWA, cannot be read here.
- 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.
More conversions
Related tools
Convert JP2 to EXR in your browser, ready for visual effects, compositing and 3D render output. 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 EXR to JP2 lose quality?
JP2 is written losslessly, so the pixels are stored exactly as decoded. Floating-point values are mapped to 8 bits per channel, and anything brighter than white clips. Not carried over: any extra channels.
Is transparency kept in the JP2?
Yes. EXR stores it as an A channel stored like any other channel, 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.