OTB to XWD Converter

Switch from OTB to XWD — simple online image conversion

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No Install Required

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

Lightning Fast

OTB files are small and convert to XWD in seconds. The cloud-based engine handles the transformation quickly so you can download right away.

Batch Processing

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

How to convert OTB to XWD

1

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

2

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

3

Let the file convert and you can download your xwd 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
XWD (X Window Dump) is a screen capture image format defined as part of the X Window System by the MIT X Consortium, dating to approximately 1987. The xwd command-line utility captures the contents of an X window or the entire screen and saves it as an XWD file — functionally equivalent to a screenshot utility but predating the concept by years. XWD files contain a detailed header specifying the X server's visual type, bit depth, byte order, bitmap unit and padding, the window's dimensions, border width, and color map information, followed by the raw pixel data exactly as represented in the X server's framebuffer. This means XWD files faithfully capture the exact pixel representation used by the display hardware — including server-specific byte ordering, padding, and color organization — making them primarily useful on the system where they were captured or on systems with compatible display configurations. The header also stores the window name string and the full color map entries for indexed-color visuals. XWD supports all X11 visual types: StaticGray, GrayScale, StaticColor, PseudoColor, TrueColor, and DirectColor, at any bit depth supported by the X server. One advantage is exact framebuffer fidelity: XWD captures the window's pixel data in its native format without any color space conversion or compression, making it the definitive record of what the X server was actually displaying. The format's integration with the X11 command-line toolkit provides another practical benefit — xwd can capture specific windows by ID or name, be triggered remotely via SSH, and piped directly to format converters. XWD files are handled by ImageMagick, GIMP, xwud (the viewer companion to xwd), and xv.
Developer: MIT X Consortium
Initial release: 1987

Frequently Asked Questions

Why would I convert OTB to XWD?

OTB originated in Nokia mobile phones and has narrow compatibility today. XWD offers screenshot format from X Window System — a far more practical choice for sharing.

What apps support XWD?

You can view XWD with xwud, GIMP, ImageMagick, XnView. These tools cover all major desktop and mobile platforms.

Is OTB to XWD conversion free?

Yes — Convertio offers free OTB to XWD conversion. Premium options exist for users who need more capacity or faster processing speeds.

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.

Does converting OTB to XWD affect quality?

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

What platforms support this OTB converter?

Since it runs in the browser, any operating system works — desktop or mobile. No platform-specific software is needed to convert OTB to XWD.