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HDR to ABW Converter

Fast HDR to ABW conversion online — simple tool

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Privacy Protected

Uploaded HDR files are removed immediately post-conversion. Generated ABW files auto-delete within 24 hours for complete privacy.

Multi-File Support

Need to convert a batch of HDR files? Upload them together and get ABW versions of each — efficient and time-saving.

Works Everywhere

Phone, tablet, laptop, desktop — the HDR to ABW converter runs on any device with a modern browser. No platform restrictions.

How to convert HDR to ABW

1

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

2

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

3

Let the file convert and you can download your abw file right afterwards

About formats

HDR (also known as RGBE or Radiance HDR) is a high-dynamic-range image format created by Greg Ward Larson as part of the Radiance) lighting simulation system, developed at Lawrence Berkeley National Laboratory starting in 1985 with the HDR format emerging around 1989. The format stores floating-point RGB pixel values using a compact 32-bit-per-pixel encoding called RGBE (Red, Green, Blue, Exponent): three 8-bit mantissa bytes share a single 8-bit exponent, representing luminance values across a range of roughly 76 orders of magnitude while keeping file sizes comparable to standard 24-bit images. HDR files begin with a text header containing rendering and exposure metadata, followed by the RGBE pixel data compressed with a scanline-oriented run-length encoding scheme. The format captures the full luminance range of real-world scenes — from deep shadows to direct sunlight — enabling physically accurate lighting calculations, tone mapping to different display conditions, and post-capture exposure adjustment without the clipping artifacts inherent in 8-bit formats. One advantage is the format's foundational role in HDR imaging: Radiance HDR pioneered the concept of storing real-world luminance values in image files, and the .hdr format became the standard for light probe images and environment maps used in image-based lighting across the 3D rendering industry. The format's compact encoding is another practical strength — the RGBE scheme provides far more dynamic range than 8-bit formats while using only 33% more storage per pixel, a favorable tradeoff that made HDR practical on storage-limited systems of the late 1980s. HDR files are supported by Photoshop, GIMP, ImageMagick, Blender, and all major 3D renderers.
Developer: Greg Ward Larson
Initial release: 1989
ABW is the native document format of AbiWord, a free and open-source word processor originally developed by AbiSource in 1998 and later maintained as part of the GNOME Office suite. The format stores document content as well-formed XML, describing paragraphs, character formatting, page layout, headers and footers, tables, lists, footnotes, and embedded images in a human-readable structure. ABW files use a straightforward markup where document sections map to XML elements with attribute-based styling, making the format transparent and easy to parse programmatically. AbiWord was designed as a lightweight alternative to heavyweight office suites, running efficiently on older hardware and resource-constrained systems while still providing core word processing functionality. One advantage is the clean XML foundation — ABW files can be inspected, transformed, and generated using standard XML tools and scripting languages without requiring the AbiWord application itself. The lightweight nature of both the format and its parent application is another practical strength: AbiWord and its ABW format are commonly found on Linux distributions targeting older computers and educational deployments in developing countries through projects like OLPC. ABW files can be converted to mainstream formats like DOC, ODT, and PDF through AbiWord's built-in export or through document conversion tools.
Developer: AbiSource
Initial release: 1998

Frequently Asked Questions

Why convert HDR to ABW?

HDR environment maps store lighting data — converting to ABW creates viewable images for portfolios or documentation.

What programs open ABW files?

AbiWord word processor and Calibre open ABW files. LibreOffice can import them with limited support

Is HDR to ABW conversion free on Convertio?

Standard HDR to ABW conversions are free. Premium plans add batch processing, larger uploads, and priority conversion speed for heavy workflows.

How many HDR files can I convert at once?

You can upload multiple HDR files in one session. Each converts to ABW separately, and all results are downloadable upon completion.

What platforms support the HDR to ABW converter?

Any device with a web browser — Windows, macOS, Linux, Chrome OS, iOS, and Android. No app installation is needed.

Will the converted ABW keep the original resolution?

Yes — the default conversion preserves the original pixel dimensions