OTB to HEIC Converter

Seamless OTB to HEIC image conversion, done in the cloud

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Cross-Platform Access

Whether you are on a desktop, tablet, or phone — convert OTB to HEIC from any device with a modern web browser.

Batch Processing

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

Reliable Conversion

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

How to convert OTB 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

OTB (Over-the-Air Bitmap) is a monochrome image format developed by Nokia as part of their Smart Messaging specification in 1997, designed for transmitting small graphics — operator logos, group graphics, and picture messages — to Nokia mobile phones via SMS. OTB files contain 1-bit (black and white) images at small fixed resolutions, typically 72x14 pixels for operator logos and 72x28 pixels for group graphics, encoded in a compact binary format suitable for embedding within the payload of SMS text messages. The format uses a simple structure: a header byte indicating whether the image is an operator logo or group graphic, width and height values, and the raw bitmap data where each bit represents one pixel packed eight per byte. The extremely tight format — designed to fit within a single SMS message (140 bytes maximum payload, shared with addressing overhead) — reflects the severe constraints of mobile communication in the late 1990s. Nokia's Smart Messaging system was one of the first commercial implementations of rich content delivery to mobile phones, and OTB images represented the entire visual content capability of Nokia handsets before MMS and mobile data browsing arrived. One advantage is the format's historical role as a pioneer of mobile visual messaging: OTB images were among the first graphics that ordinary consumers could send to each other's phones, predating MMS, camera phones, and smartphones by nearly a decade. The format's minimal footprint is another characteristic — entire images fit in a few dozen bytes, reflecting an era of extreme bandwidth constraints. OTB files are supported by ImageMagick, various Nokia phone management tools, and specialty mobile format utilities.
Developer: Nokia
Initial release: 1997
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 OTB to HEIC?

OTB is tied to Nokia mobile phones. Switching to HEIC gives you modern Apple image format with superior compression and broad support across platforms, browsers, and devices.

How do I open a HEIC file?

Software that handles HEIC includes macOS/iOS natively, Windows 10+ with extension, GIMP, Photoshop — giving you options on every major operating system.

Can I convert multiple OTB files to HEIC at once?

Yes — upload several OTB files in one session and Convertio processes them all into HEIC simultaneously, saving you time.

Is OTB to HEIC conversion free?

You can convert OTB to HEIC for free on Convertio. Premium plans are available if you need higher throughput or larger file allowances.

Does converting OTB to HEIC affect quality?

Quality is maintained to the extent HEIC supports. Since OTB is an Over-The-Air bitmap format for early Nokia phones, the visual data transfers cleanly to HEIC.

How long does OTB to HEIC conversion take?

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