Free online JP2 to HEIC converter

An Apple Photos library, iPhone/iPad workflow, or application that explicitly requires .heic may not accept a JPEG 2000 .jp2 file. Conversion produces an HEIC image for that destination while preserving the original JP2 as the source copy.

JP2 and its uses

JP2 is the standard file format for JPEG 2000 image data, not a conventional JPEG file. JPEG 2000 supports lossy or lossless compression, tiling, embedded ICC color profiles, alpha channels, and high bit depths.

JPEG 2000 is used by cultural-heritage digitization projects, scanning systems, GIS and satellite-data workflows, and some medical, scientific, and document-imaging systems. A JP2 file cannot be converted by renaming .jp2 to .jpg or .heic; its image data must be decoded and re-encoded.

HEIC and its advantages

HEIC is the common extension for HEIF files containing HEVC/H.265-encoded images. Apple devices can create and display HEIC photos, and the format can store still images, image sequences, thumbnails, metadata, transparency, and high-bit-depth image data.

For photographs, HEIC commonly produces a smaller file than JPEG at a similar visual quality. It is not automatically smaller or better than every JP2 file: JPEG 2000 and HEIC use different encoders, settings, image content, and color handling.

Convert a JP2 file to HEIC

Use the converter on 101convert.com for free without installing software. Add the .jp2 file, select HEIC as the output format, start the conversion, then download the .heic result. Open the result in the application or device that requires it before deleting or moving the original.

For local batch conversion, ImageMagick requires a build with JPEG 2000 input support, usually through OpenJPEG, and HEIC output support through libheif. A typical command is:

magick input.jp2 -quality 90 output.heic

The quality value controls lossy HEIC encoding; lower values usually reduce file size and increase compression artifacts. On macOS or Linux, convert every JP2 file in a folder without overwriting the sources:

for f in *.jp2; do magick "$f" -quality 90 "${f%.jp2}.heic"; done

If ImageMagick cannot read JP2 or write HEIC, check its format support with magick -list format. Install a build that lists JPEG 2000 input and HEIC/HEIF output support.

For one file on macOS, Preview can be used if it opens the JP2 and lists HEIC as an export format: choose File → Export, select HEIC, choose the quality setting, and save. Available export formats vary by macOS version and image properties.

Quality and compatibility limits

A lossless JP2 generally becomes a lossy file when converted with typical HEIC settings. HEIC and HEVC can support lossless coding in some implementations, but many consumer converters use lossy output; retain the JP2 when it is an archival master, scan master, scientific image, or supplied source file.

Conversion can discard or change JPEG 2000-specific features, including resolution layers, tiles, specialized metadata, uncommon color spaces, 16-bit samples, and alpha handling. Check pixel dimensions, orientation, color appearance, transparency, and required metadata after conversion.

HEIC support is strong in current Apple operating systems but remains less universal than JPEG. On Windows, viewing HEIC may require the Microsoft HEIF Image Extensions and, depending on the file and application, HEVC codec support. Many websites, older programs, and email recipients handle JPEG more reliably.

A single JP2 image converts to a single HEIC still image; it does not become an Apple Live Photo or an image sequence.