OTB to HEIF Converter

Easily convert OTB to HEIF image format in your browser

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Browser-Based Tool

No software to download — convert OTB to HEIF entirely in your web browser. Works on any device with an internet connection.

Reliable Conversion

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

Cross-Platform Access

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

How to convert OTB to HEIF

1

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

2

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

3

Let the file convert and you can download your heif 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
HEIF (High Efficiency Image File Format) is a container format for images and image sequences standardized by the Moving Picture Experts Group as ISO/IEC 23008-12, first published in 2015. HEIF is built on the ISO Base Media File Format (ISOBMFF, the same container used for MP4 video), providing a flexible structure that can hold single images, image collections, image sequences (like animations or bursts), and derived images with non-destructive editing operations. The container is codec-agnostic — while the most common implementation pairs HEIF with HEVC/H.265 compression (branded as HEIC by Apple), the standard also accommodates AV1 compression (creating the AVIF variant), H.266/VVC, and other future codecs. HEIF supports features that JPEG lacks: 10-bit and 12-bit color depth, wide color gamuts (Display P3, BT.2020), lossless compression, alpha transparency, depth maps, thumbnail images, and Exif/XMP metadata — all within a single file. Auxiliary image items can store computational photography data like depth maps, HDR gain maps, and semantic segmentation masks. One advantage is the format's future-proof architecture: by separating the container from the codec, HEIF can adopt newer, more efficient compression technologies without changing the file structure, metadata handling, or application-level APIs. The substantial compression improvement over JPEG is another core strength — HEVC-based HEIF typically achieves 40-50% file size reduction compared to JPEG at the same visual quality, beneficial for storage and bandwidth. HEIF is supported by Apple's ecosystem (iOS, macOS), Windows 10/11, Android 10+, GIMP, ImageMagick, and Adobe products.
Initial release: 2015

Frequently Asked Questions

What is the reason to convert OTB to HEIF?

Few modern tools handle OTB natively. HEIF provides next-gen image format with excellent compression ratios, making it widely recognized across operating systems and applications.

What programs open HEIF files?

Open HEIF using macOS/iOS natively, Windows with HEIF extension, GIMP, Photoshop. Cross-platform support means you can access these files on virtually any system.

How long does OTB to HEIF conversion take?

Conversion is nearly instant for most OTB files. Since these are small images, the entire process — upload to download — takes only moments.

Does this converter work on mobile devices?

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

Are my uploaded files kept private?

Completely. Convertio removes uploaded OTB files right after conversion, and the HEIF output is automatically deleted within 24 hours.

What exactly is the OTB format?

OTB (Over-The-Air bitmap format for early Nokia phones) originated in Nokia mobile phones. It has very limited modern application support but can be converted to modern formats on Convertio.