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OTB to AW Converter

Online OTB to AW — image to document in seconds

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Image to Document

Convert legacy OTB images into AW documents for professional distribution. Applix Word is recognized across all platforms.

No Install Required

The entire OTB to AW conversion happens in your browser. No plugins, no desktop apps — just upload, convert, and download.

Secure Processing

Uploaded OTB images are erased right after conversion, and the resulting AW files are purged within 24 hours — your data stays private.

How to convert OTB to AW

1

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

2

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

3

Let the file convert and you can download your aw 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
AW is the document format of Applix Words, the word processor component of the Applix office suite (later renamed Anyware Office) developed by Applix, Inc. for Unix and Linux workstations. The suite targeted enterprise Unix environments during the 1990s, providing word processing, spreadsheet, graphics, and presentation capabilities on platforms like Solaris, HP-UX, AIX, and Linux where Microsoft Office was unavailable. AW files store formatted text documents with support for character and paragraph styling, page layout, tables, headers and footers, and embedded graphics. The format uses a proprietary binary structure optimized for the Applix application's internal document model. Applix Words gained particular visibility in the Linux community during the late 1990s when it was bundled with several commercial Linux distributions as their default word processor before OpenOffice.org became widely available. One advantage was native Unix platform support — Applix provided professional word processing capabilities on Unix workstations at a time when few commercial alternatives existed. The format's tight integration with other Applix suite components enabled cross-referencing between word processing documents, spreadsheets, and presentations. Applix was acquired by Cognos in 2003, and the office suite was discontinued. AW files are primarily encountered today in archived documents from Unix enterprise environments of the 1990s and early 2000s.
Developer: Applix, Inc.
Initial release: 1992

Frequently Asked Questions

What is the reason to convert OTB to AW?

OTB images have limited reach. Placing them in an AW (Applix Words document format) ensures they can be opened by virtually anyone.

What apps support AW?

You can view AW with Applix Office, LibreOffice Writer. These tools cover all major desktop and mobile platforms.

Is OTB to AW conversion free?

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

What exactly is the OTB format?

OTB is an Over-The-Air bitmap format for early Nokia phones. Originally from Nokia mobile phones, it has become a legacy format — conversion is the most practical way to use these images today.

Does converting OTB to AW affect quality?

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

Can I convert multiple OTB files to AW at once?

Convertio supports batch mode — drag in multiple OTB files and they all convert to AW together, which is much faster than one-by-one.