LRF to CUR Converter

Free LRF to CUR conversion — custom cursor images

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Creative Cursor Making

Pull visual elements from your old LRF ebooks and convert them into CUR cursor images for a personalized desktop experience.

All in the Browser

No cursor editing software required. Convert LRF to CUR entirely in your web browser — upload, convert, download.

Files Stay Confidential

Your uploaded LRF file is erased after processing. CUR output is automatically deleted from servers within 24 hours.

How to convert LRF to CUR

1

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

2

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

3

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

About formats

LRF is the file format associated with Sony's BBeB (Broadband eBook) specification, jointly developed by Sony and Canon and introduced in 2004 with the Sony Librie EBR-1000EP — the world's first commercial E Ink e-reader. The format supports both reflowable text and fixed-layout page rendering, embedding fonts, images, vector graphics, and metadata within a compact binary container. LRF files use a block-based internal structure with object trees describing page layouts, text streams, image resources, and table of contents navigation. Sony's Reader devices and the companion desktop software (Sony Reader Library) served as the primary ecosystem for LRF content throughout the mid-2000s. A key advantage was its early adoption of high-quality font embedding and text rendering optimized specifically for E Ink displays, delivering a reading experience noticeably superior to many competing formats of the era. The format also supported bookmark synchronization, dictionary lookups, and annotations within the Sony Reader ecosystem. However, Sony officially discontinued BBeB/LRF support in 2010, migrating its Reader platform to the industry-standard EPUB format. Today LRF files are primarily encountered in personal ebook collections from that period and can be converted to modern formats using tools like Calibre. The format remains a historically significant milestone as the native format of the device category that launched the modern e-reader revolution.
Developer: Sony
Initial release: 2004
CUR is the cursor image format for Microsoft Windows, structurally nearly identical to the ICO (icon) format but with the addition of a hotspot coordinate that identifies the precise pixel position where mouse clicks register. Introduced with early Windows versions, CUR files use the same container structure as ICO: a directory header listing one or more image entries, each specifying dimensions and color depth, followed by the pixel data for each variant. Like ICO, a single CUR file can contain multiple images at different sizes and color depths, allowing Windows to select the most appropriate cursor image for the current display resolution and color settings. Image data within CUR files can be stored as BMP pixel arrays (for legacy compatibility) or as embedded PNG images (supported since Windows Vista) for alpha-blended cursors with smooth edges. The hotspot coordinate — the distinguishing feature separating CUR from ICO — is stored as an X,Y pair in the directory entry header, typically pointing to the tip of an arrow or the center of a crosshair. One advantage is multi-resolution packaging: a single CUR file provides appropriate cursor imagery across display densities from standard DPI to high-DPI screens. Native Windows integration is another strength — CUR files are loaded directly by the operating system for mouse cursor display without any third-party software. CUR files are used by application developers and theme creators to customize the pointing experience across Windows environments.
Developer: Microsoft
Initial release: 1987

Frequently Asked Questions

Why convert LRF to CUR?

CUR is the Windows cursor format. Converting LRF page graphics to CUR lets you make unique custom cursors from ebook art.

Which apps can open CUR files?

Windows uses CUR natively for mouse cursors. GIMP, IrfanView, and RealWorld Cursor Editor also open and edit CUR files.

How is CUR different from ICO?

CUR and ICO share the same structure, but CUR includes a hotspot coordinate defining where the cursor click point is.

What size should a cursor image be?

Standard cursor sizes are 32x32 or 48x48 pixels. The converter can produce the appropriate dimensions for CUR output.

Is this conversion free?

Convertio provides free LRF to CUR conversion. Upgraded plans add higher file limits and faster processing queues.