PICON to HEIC Converter

Online PICON to HEIC — convert images without any software

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Batch Processing

Upload multiple PICON files at once and convert them all to HEIC in a single session — ideal when you have many legacy images to migrate.

Format Upgrade

Move from early Unix desktop era PICON to the modern HEIC format — enjoy modern Apple image format with superior compression and broad software compatibility.

Reliable Conversion

Convertio handles the PICON to HEIC transformation accurately, preserving your image content while delivering a widely compatible output.

How to convert PICON to HEIC

1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

2

Choose heic or any other format you need as a result (more than 200 formats supported)

3

Let the file convert and you can download your heic file right afterwards

About formats

PICON (Personal Icon) is a small-format image type used in the X Window System ecosystem, developed by Steve Kinzler at Indiana University around 1990 as part of the picons (personal icons) database project. Picons are small, typically 48x48 pixel, color images used as visual identifiers for people, organizations, domains, and Usenet newsgroups in Unix mail readers, news readers, and other communication tools. The picon format is essentially an XPM (X PixMap) image stored with specific naming conventions and directory structures that allow software to look up the appropriate icon based on email address, domain name, or newsgroup name. The picons database organized thousands of these small images in a hierarchical directory structure keyed by domain name components (e.g., faces/com/example/user.xpm), enabling mail clients like exmstrstrstr and faces to automatically display a sender's photo or organizational logo alongside their messages. The system predated the modern concept of contact photos and avatars by more than a decade. One advantage is the system's pioneering role in visual identity for electronic communication: picons introduced the idea that email and Usenet messages should display a visual representation of the sender — a concept that eventually became standard in every modern email client, messaging app, and social media platform. The XPM-based format ensures that picons are displayable on any system with X Window libraries. Picon images are supported by ImageMagick, GIMP, and X Window display utilities, and the historical picons database remains archived online at Indiana University.
Developer: Steve Kinzler
Initial release: 1990
HEIC (High Efficiency Image Container) is Apple's branded implementation of the HEIF (High Efficiency Image File Format) standard that uses HEVC (H.265) as its image compression codec. Apple adopted HEIC as the default photo format on iPhones and iPads starting with iOS 11 in September 2017, replacing JPEG for newly captured images. HEIC files store photographs compressed with the intra-frame coding mode of the HEVC video codec, which applies sophisticated prediction, transform, and entropy coding techniques that achieve roughly 50% better compression than JPEG at equivalent visual quality. The ISOBMFF (ISO Base Media File Format) container supports multiple images in a single file, enabling Live Photos (a still plus a short video clip), burst sequences, depth maps from dual-camera systems, and HDR gain maps that allow compatible displays to render extended dynamic range. HEIC also stores alpha channels, auxiliary images for computational photography features (portrait mode depth data, semantic segmentation masks), and comprehensive EXIF/XMP metadata. One advantage is storage efficiency: iPhones shooting HEIC use roughly half the storage of equivalent JPEG captures with no visible quality loss, a significant benefit on devices where storage is finite and photos accumulate rapidly. The format's integration with Apple's ecosystem is another key strength — HEIC files are natively supported across macOS, iOS, iPadOS, and iCloud Photos, and automatic JPEG transcoding during file sharing ensures compatibility when sending photos to non-Apple devices. HEIC can also be opened by Windows 10/11 (with codec), GIMP, ImageMagick, and Adobe Lightroom.
Developer: MPEG / Apple
Initial release: 2015

Frequently Asked Questions

Why would I convert PICON to HEIC?

PICON is a small thumbnail/icon format from Unix systems with limited modern support. Converting to HEIC (modern Apple image format with superior compression) makes your images accessible on any modern platform.

Which software can view HEIC files?

HEIC files can be opened with macOS/iOS natively, Windows 10+ with extension, GIMP, Photoshop. Most of these are available across Windows, macOS, and Linux.

Does converting PICON to HEIC affect quality?

Your image content stays intact during conversion. Any differences depend on HEIC characteristics — such as color depth or compression method.

How long does PICON to HEIC conversion take?

Most PICON to HEIC conversions complete within a few seconds. The lightweight nature of PICON images means fast processing times.

What exactly is the PICON format?

PICON (small thumbnail/icon format from Unix systems) originated in Unix file managers. It has very limited modern application support but can be converted to modern formats on Convertio.

Does this converter work on mobile devices?

The converter is browser-based and fully responsive. Convert PICON to HEIC from any device — desktop, laptop, tablet, or smartphone.