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OTB to RTF Converter

Transform OTB graphics into RTF documents effortlessly

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Secure Processing

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

Effortless Process

Converting OTB to RTF takes just a few clicks — no technical knowledge required. Upload, choose your format, and download the result.

Image to Document

Convert legacy OTB images into RTF documents for professional distribution. Rich Text Format is recognized across all platforms.

How to convert OTB to RTF

1

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

2

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

3

Let the file convert and you can download your rtf 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
RTF (Rich Text Format) is a document interchange format developed by Microsoft and first published in 1987 with Word 3.0. The format encodes document content and formatting as plain ASCII text using control words (backslash-prefixed commands) and groups (curly-brace-delimited sections) that describe fonts, character formatting, paragraph layout, tables, images, and page setup. Because RTF is fundamentally a text format with no binary components, documents pass cleanly through any text channel — email systems, clipboard operations, and cross-platform transfers — without corruption. Microsoft designed RTF explicitly as a cross-application and cross-platform exchange format, and it achieved broad adoption: virtually every word processor, text editor, and document tool on every operating system has supported RTF reading and writing for decades. One advantage is exceptional cross-platform compatibility — an RTF document created on any application renders with consistent formatting on any other, making it the most reliable format for text exchange between incompatible systems. The text-based structure provides another benefit: RTF files resist corruption, are trivially generated by programs (requiring only string concatenation), and can be debugged by reading the raw markup in a text editor. While RTF lacks modern features like tracked changes and advanced layout controls, and Microsoft declared the specification frozen at version 1.9.1 in 2008, the format persists as a dependable interchange option where DOCX compatibility cannot be assumed.
Developer: Microsoft
Initial release: 1987

Frequently Asked Questions

Why would I convert OTB to RTF?

Converting OTB to RTF embeds your image into a cross-platform formatted text — useful for reports, archival, and sharing in a universally accepted format.

What programs open RTF files?

Open RTF using Microsoft Word, LibreOffice, TextEdit, WordPad. Cross-platform support means you can access these files on virtually any system.

Can I convert multiple OTB files to RTF at once?

Absolutely. Batch upload your OTB images and convert them all to RTF in a single pass — no need to repeat the process for each file.

Is OTB to RTF conversion free?

Standard conversions are available for free on Convertio. Larger volumes or higher usage may benefit from a premium plan for additional capacity.

What exactly is the OTB format?

The OTB format is an Over-The-Air bitmap format for early Nokia phones, rooted in Nokia mobile phones. Modern software rarely supports it natively, making conversion essential.

How long does OTB to RTF conversion take?

Usually just seconds. OTB files are typically small, so the upload, conversion, and download process finishes very quickly on Convertio.