SIX to GIF Converter

Turn terminal graphics into GIF images for free online

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Effortless Process

The SIX to GIF converter guides you through a clear upload-convert-download workflow — no technical expertise required.

Terminal Art Capture

Convert DEC terminal SIX graphics to GIF — turn text-encoded terminal imagery into standard images anyone can view.

Browser-Based Tool

No downloads or plugins needed — convert SIX to GIF directly in your web browser on any operating system or device.

How to convert SIX to GIF

1

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

2

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

3

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

About formats

SIX is a file extension for SIXEL (Six Pixel) graphics data, a bitmap graphics format developed by Digital Equipment Corporation (DEC) in 1983 and introduced with the LA50 dot matrix printer. SIXEL encodes images as a sequence of printable ASCII characters, where each character represents a column of six vertical pixels (a 'sixel') — the character's ASCII value minus 63 provides a 6-bit binary pattern, with each bit controlling one pixel in the vertical column. The encoding is structured as a series of sixel bands (each six pixels tall) across the image width, with control sequences for color selection (up to 256 registers with HLS or RGB specification), repeat counts (run-length encoding for efficiency), carriage return, and newline commands. SIXEL data is transmitted to the output device using DEC's standard escape sequence protocol, embedded within the text stream alongside regular character output. Originally designed for DEC's line of printers and later supported by DEC VT-series terminals (VT240, VT330, VT340), SIXEL has experienced a remarkable revival in modern terminal emulator software. One advantage is terminal-native image display: SIXEL allows images to be rendered directly within a text terminal session without requiring a graphical window system, enabling command-line tools to display graphs, photographs, and previews inline with text output. This capability has driven adoption in modern terminals like mlterm, xterm, WezTerm, and foot. SIX/SIXEL data can be generated by ImageMagick, libsixel, and chafa, and viewed in any SIXEL-capable terminal emulator.
Initial release: 1983
GIF (Graphics Interchange Format) was introduced by CompuServe on June 15, 1987 as a platform-independent image format for transmitting color graphics over the CompuServe online service's modem-speed connections. The format uses LZW (Lempel-Ziv-Welch) lossless compression on indexed-color images with a palette of up to 256 colors selected from a 24-bit RGB color space. GIF's most distinctive capability is animation: multiple image frames can be stored sequentially within a single file, each with independent delay timing, disposal methods, and local color palettes, enabling short looping animations without any video codec or player. The format also supports binary transparency (one palette entry designated as fully transparent) and interlaced display for progressive rendering. GIF became synonymous with web culture — animated GIFs proliferated across early websites, messaging platforms, and social media, evolving into a communication medium in their own right. One advantage is universal animation support — GIF animations play natively in every web browser, email client, messaging app, and social platform without plugins, codecs, or compatibility concerns, a level of ubiquity no other animation format has achieved. The lossless compression on palette-based images provides another strength: graphics with flat colors, text, and sharp edges (logos, diagrams, UI elements) compress efficiently without the artifacts that affect JPEG. Although the LZW patents that once threatened GIF's use expired in 2004, and newer formats like WebP and AVIF offer superior compression with full-color animation, GIF's cultural entrenchment keeps it irreplaceable for casual animated content.
Developer: CompuServe
Initial release: June 15, 1987

Frequently Asked Questions

Why convert SIX to GIF?

DEC SIX terminal images cannot be opened in regular image viewers. Converting to GIF preserves the artwork in a portable form.

What programs can open GIF?

All web browsers display GIF natively. Photoshop, GIMP, and IrfanView edit them. Mobile devices show GIF images in gallery apps.

Does SIX to GIF preserve quality?

GIF preserves image data without lossy compression, so the visual content from your SIX is retained faithfully during conversion.

Is SIX to GIF conversion fast?

Most SIX images convert to GIF within seconds. The exact time depends on the resolution and complexity of the source, but it is typically quick.

Can I convert multiple SIX images at once?

Batch conversion is supported. Queue as many SIX files as you need and convert them all to GIF in a single run — no repeating steps manually.