CFF to VIFF Converter

Render CFF font data as Khoros VIFF visualization images online

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Scientific Imaging

VIFF is built for visualization and analysis. Converting CFF to VIFF produces font images compatible with the Khoros scientific imaging ecosystem.

Online Conversion

No Khoros suite or scientific tools needed — convert CFF to VIFF directly from your web browser on any operating system.

Secure Data

CFF uploads are deleted right after conversion and VIFF results are purged within 24 hours — total privacy for your font data.

How to convert CFF to VIFF

1

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

2

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

3

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

About formats

CFF (Compact Font Format) is a font outline format developed by Adobe Systems around 1996 as a more efficient successor to the Type 1 font representation. CFF uses Type 2 charstrings — an optimized encoding that supports multiple arguments per operator, default value elision, and shared subroutines — to describe the same cubic Bezier glyph outlines as Type 1 but with substantially less storage. A typical CFF font is 20-50% smaller than its Type 1 equivalent. The format can function as a standalone font file or, more commonly, as the outline data table inside an OpenType font container (the CFF table in OTF files with PostScript outlines). CFF supports multiple fonts within a single file through its FontSet structure, sharing global subroutines across the collection to further reduce size. One advantage is compression efficiency without lossy degradation — every control point and hint is preserved exactly, just encoded more compactly. The format also inherits the full hinting capability of Type 1, including stem hints, counter hints, and alignment zones that ensure crisp rendering on low-resolution screens and printers. CFF2, an evolution introduced with OpenType 1.8, adds support for font variations (variable fonts) by allowing interpolation across multiple design axes. Broad support in PDF viewers, web browsers via OpenType, and professional design software makes CFF one of the most widely deployed outline formats in digital typography.
Developer: Adobe Systems
Initial release: 1996
VIFF (Visualization Image File Format) is a scientific image format developed by Khoral Research (originally at the University of New Mexico), first appearing around 1990 with the Khoros visual programming environment for image processing and data visualization. VIFF files use a 1024-byte header followed by optional color map data, and the image data itself, with the header containing detailed specifications: data storage type (bit, byte, short, integer, float, double, complex), data encoding (none, CCITT Group 3/4), color space model (none, generic, RGB, HSI, CMYK, and others), and support for multi-band (multi-channel) images with arbitrary numbers of bands. The format accommodates one-dimensional signals, two-dimensional images, three-dimensional volumes, and location data (sparse pixel coordinates), making it versatile beyond simple image storage. VIFF was designed for the Khoros/VisiQuest visual dataflow programming environment, where users constructed image processing pipelines by connecting processing nodes in a graphical canvas — an approach that influenced later systems like AVS, MATLAB Simulink, and LabVIEW. One advantage is scientific data fidelity: VIFF supports the full range of numeric types used in scientific computing (including complex numbers and double-precision floats), stores multi-band datasets natively, and carries calibration metadata — making it suitable for remote sensing, medical imaging, and spectral analysis applications where generic image formats lose information. The format's connection to the Khoros visual programming paradigm provides another notable dimension — VIFF was the standard I/O format for one of the most influential early visual programming environments for scientific image analysis. VIFF files can be read by ImageMagick and legacy Khoros/VisiQuest installations.
Developer: Khoral Research
Initial release: 1990

Frequently Asked Questions

Why convert CFF to VIFF?

VIFF is the Khoros visualization format used in scientific image analysis. Converting CFF to VIFF produces font renderings compatible with Khoros toolkits.

How do I open a VIFF file?

VIFF files are used by the Khoros/VisiQuest visualization suite. ImageMagick and some scientific imaging tools also support reading VIFF format images.

Is VIFF a scientific format?

Yes — VIFF was designed for the Khoros image processing and visualization environment, primarily used in academic and scientific research contexts.

Does VIFF support multiple data types?

VIFF supports various pixel data types including integer and floating-point, making it flexible for scientific imaging needs beyond simple display.

Is CFF to VIFF free?

Yes — Convertio provides CFF to VIFF conversion at no cost, entirely browser-based with no software to install.