Add your JP2 file
Drop one or more .jp2 files onto the converter above, or browse for them. They load into browser memory only — nothing is uploaded, so there is no size-based pricing and no server queue.
JP2 to PNG
Converting a .jp2 image to .png re-encodes the pixels for a different balance of size, quality, and support. Free, private, and validated — the file never leaves your browser.
Private for supported formats — processed in your browser
Runs on your deviceConvert supported files
Drop JP2 files here
Batch files can each use a different output. Nothing uploads for local conversions.
Working inputs include camera RAW, browser-local audio/video, PDF, CBZ/CBR comics, office documents, ebooks, markup, 3D models, structured text, images, and archives.About converting JPEG 2000 image to PNG image
Converting a .jp2 image to .png re-encodes the pixels for a different balance of size, quality, and support. A .jp2 file is a JPEG 2000 image in the boxed JP2 container: wavelet-compressed raster data plus the header boxes that declare its colour space and metadata. It was designed as JPEG's technical successor and, although the web never adopted it, it became the standard in digital cinema, medical imaging, and archival scanning.
A .png file is a losslessly compressed raster image with full 8-bit alpha transparency, making it the standard choice for graphics that must stay pixel-perfect. Screenshots, logos, UI assets, and diagrams are the classic .png territory, since sharp edges and flat color survive without compression artifacts. For this route the practical draw is perfectly lossless, so files can be opened and re-saved indefinitely and true 8-bit (or 16-bit) alpha channel — balanced against photographic content produces files several times larger than JPEG or WebP, which is worth knowing before you commit a large batch.
Why convert JP2 to PNG?
The practical trigger for this conversion is usually a mismatch: with .jp2, no mainstream browser decodes it, and Safari dropped its support, so it is unusable for web delivery. Switching to .png buys you perfectly lossless, so files can be opened and re-saved indefinitely, which is why it is the better fit for screenshots and screen recordings exported as stills. Because the conversion runs locally, trying it costs nothing but a few seconds of compute on your own machine.
JP2 vs PNG at a glance
| Aspect | JPEG 2000 image (.jp2) | PNG image (.png) |
|---|---|---|
| Format type | Lossy — discards detail it judges invisible to shrink files | Lossless — every pixel or sample is preserved exactly |
| How it stores data | discrete wavelet transform: the reversible LeGall 5/3 filter for lossless coding and the irreversible CDF 9/7 filter for lossy | uses DEFLATE compression preceded by per-scanline prediction filters (None, Sub, Up, Average, Paeth) |
| Strongest at | digital cinema packages, where the DCI specification mandates JPEG 2000 for the picture track | screenshots and screen recordings exported as stills |
| Weak spot | no mainstream browser decodes it, and Safari dropped its support, so it is unusable for web delivery | photographic content produces files several times larger than JPEG or WebP |
| Metadata | the JP2 container holds an ICC profile in its colour specification box and can carry XMP in a UUID box, EXIF in a UUID box, arbitrary XML, and an intellectual-property box. This converter reads the pixels only; header boxes are not carried into the raster outputs | text metadata lives in tEXt/iTXt chunks and XMP can be embedded there; standardized EXIF arrived late via the 2017 eXIf chunk, so many tools still drop EXIF when writing PNG |
Pick PNG as the output
Select .png in the output menu next to each file. The menu only offers targets this engine can genuinely produce, so if PNG is selectable, the route is real and validated.
Convert on your device
Press Convert. Decoding and re-encoding happen on your device using the browser's native image pipeline and hand-tuned encoders.
Verify and download
Each result is signature-checked before the download unlocks, so a failed encode can never masquerade as a valid PNG file. Outputs keep the original filename with the .png extension.
JP2 to PNG questions, answered
Will converting JP2 to PNG lose quality?
No new loss is introduced — since jp2 is lossy-oriented and png is lossless-oriented, everything the .jp2 file still contains is carried over exactly. What was already discarded by the original lossy encode cannot be recovered, though; converting to .png does not "restore" quality.
Is it private to convert JP2 files here?
Yes — the .jp2 file is processed inside your browser tab and never uploaded. Decoding and re-encoding happen on your device using the browser's native image pipeline and hand-tuned encoders. Close the tab and the file is gone from memory.
Where will the PNG file work?
Every modern browser has rendered PNG with full alpha since Internet Explorer 7 fixed its transparency bug in 2006, and native OS support is universal on Windows, macOS, Linux, iOS, and Android. It is also the required format in many contexts, such as iOS app icons and favicon fallbacks.
Will the PNG file be bigger or smaller than my JP2?
Larger, sometimes much larger. A lossless .png must store every pixel or sample the decoder produced, without the perceptual shortcuts .jp2 used. Use this route for editing headroom, not for saving space.
What happens to the metadata in my JP2 file?
In .jp2, the JP2 container holds an ICC profile in its colour specification box and can carry XMP in a UUID box, EXIF in a UUID box, arbitrary XML, and an intellectual-property box. This converter reads the pixels only; header boxes are not carried into the raster outputs. Re-encoding through the browser pipeline does not carry embedded metadata into the output, which doubles as a privacy scrub — check the exported file if you specifically need tags preserved.