GIF (Graphics Interchange Format)
The looping format that turned the early web into a moving picture show.
| Full name | Graphics Interchange Format |
| Extension | .gif |
| MIME type | image/gif |
| Developer | CompuServe (Steve Wilhite) |
| Released | 1987 (GIF87a); updated 1989 (GIF89a) |
| Type | Raster image / animated image |
| Color depth | Up to 256 colors (8-bit palette) |
| Compression | LZW (lossless) |
What is a GIF file?
GIF is one of the oldest image formats still in active use on the web. It supports short looping animations, making it a staple for reaction clips, simple visual jokes, and lightweight motion graphics. Every major browser, messaging app, and social platform supports it natively.
GIF stores image data as a sequence of frames, each referencing a palette of up to 256 colors. Between frames you can set delays, creating the effect of animation without any video codec. The format uses LZW lossless compression, which works especially well on images with large flat-colored areas. Each file begins with the header bytes GIF87a or GIF89a, identifying which version of the spec it follows.
History
Steve Wilhite led the team at CompuServe that created GIF, releasing the first version on June 15, 1987. The goal was to send sharp color images over 2,400 bps dial-up modems without destroying quality. The 1989 update (GIF89a) added animation support, transparency, and frame delays, which are the features most people associate with GIFs today.
Container vs codec
A GIF file opens with a six-byte header (GIF87a or GIF89a) followed by a logical screen descriptor that sets the canvas size. A global color table can hold up to 256 RGB entries shared across all frames. Each frame has its own image descriptor and optional local color table, then LZW-compressed pixel data stored as a bit stream. An animation trailer block marks the end of the file.
What it is used for
- Short looping reaction clips and memes shared in chat apps and social media
- Simple UI animations such as loading spinners and hover effects on websites
- Lightweight product demos or tutorials where a video player would be overkill
- Archiving pixel art and retro graphics that fit naturally in the 256-color palette
How to open it
Any modern web browser opens GIF files directly; just drag the file into the address bar. Image editors like GIMP, Photoshop, and most photo viewers also open GIFs and let you inspect or edit individual frames.
Pros and cons
Strengths
- Universal support across every browser, device, and messaging platform
- Animation plays automatically with no plugin or video player required
- LZW compression keeps file sizes small for simple graphics and flat-color images
- Transparent pixels are supported, letting GIFs sit cleanly over any background
Trade-offs
- Hard limit of 256 colors per frame produces visible banding in photographs
- No audio track; GIF is silent by design
- File sizes grow quickly for long or complex animations compared to MP4 or WebP
- No true alpha transparency; each pixel is either fully transparent or fully opaque
Convert GIF files
Free, in your browser, no signup. Start at the GIF converter, or jump straight to a popular conversion below.
From GIF
Curious how fast and how small? See our measured conversion benchmarks.
GIF FAQ
Is GIF pronounced with a hard G or a soft G?
Steve Wilhite, who created the format, said in 2013 that it is pronounced with a soft G, like the peanut butter brand Jif. Most people say it with a hard G anyway, and both pronunciations are widely understood.
Why do GIFs look worse than MP4 videos?
GIF can only show 256 colors per frame, while MP4 uses full 24-bit color and modern video codecs. Photographs and footage with gradients always look blocky or washed out in GIF form. Converting to MP4 or WebP gives far better quality at a smaller file size.
Can I convert a GIF to an MP4?
Yes. Converting a GIF to MP4 typically cuts the file size by 60 to 90 percent while improving color quality. Most online converters and tools like FFmpeg handle the conversion in seconds.
What is the difference between GIF87a and GIF89a?
GIF87a, released in 1987, supports basic images with a shared color palette. GIF89a, released in 1989, added animation (multiple frames with delay timings), transparency, and comment blocks. Virtually all GIFs you encounter today use the GIF89a spec.