File Formats Encyclopedia
In-depth architectural specifications, compression standards, magic byte signatures, and browser compatibility matrices for modern digital file standards.
High Efficiency Image Container
Modern Photography Standard
HEIC (High Efficiency Image Container) is the default image capture format introduced by Apple in iOS 11. Built upon the High Efficiency Video Coding (HEVC / H.265) compression standard, HEIC produces photos that are roughly 50% smaller than legacy JPEG files while delivering superior dynamic range, 16-bit color depth support, and auxiliary depth-map storage for Portrait Mode.
WebP Modern Image Format
Core Web Vitals Standard
WebP is a modern raster image file format developed by Google in 2010 to replace legacy JPEG, PNG, and GIF formats on the web. Utilizing predictive coding derived from the VP8 video codec, WebP provides 25% to 34% smaller file sizes than JPEG at equivalent quality, along with lossless compression and full alpha transparency.
PDF/A Archival Standard
Legal & Government Compliance
PDF/A is an ISO-standardized version of the Portable Document Format (PDF) specifically engineered for the long-term archiving and preservation of electronic documents. While standard PDFs allow external font references, dynamic JavaScript, audio clips, and encryption, PDF/A strictly prohibits any feature that could prevent a document from rendering identically 50 years into the future.
Scalable Vector Graphics
Web UI & Iconography Standard
Scalable Vector Graphics (SVG) is an XML-based vector image format developed by the World Wide Web Consortium (W3C). Unlike raster formats (JPEG, PNG, WebP) that store grids of individual pixels, SVG defines visual elements using geometric mathematical descriptions: paths, lines, curves, circles, and polygons. Consequently, an SVG can be scaled to any size—from a 16px favicon to a 50-foot billboard—without losing crispness.
AV1 Image File Format
Next-Generation Codec
AVIF (AV1 Image File Format) is an open, royalty-free raster image format developed by the Alliance for Open Media (consisting of Google, Apple, Microsoft, Mozilla, Amazon, and Netflix). Leveraging intra-frame compression from the state-of-the-art AV1 video codec packaged inside an ISOBMFF container, AVIF delivers up to 50% better compression efficiency than JPEG and 20% better than WebP.
JavaScript Object Notation
API & Data Interchange Standard
JavaScript Object Notation (JSON) is a lightweight, text-based, language-independent data interchange format created by Douglas Crockford in 2001. Standardized under RFC 8259 and ECMA-404, JSON has completely replaced XML as the dominant format for web APIs, configuration files, and NoSQL document databases due to its human readability and effortless native parsing in every modern programming language.
YAML Ain't Markup Language
DevOps & Cloud-Native Standard
YAML (recursive acronym for "YAML Ain't Markup Language") is a human-friendly data serialization language widely adopted for configuration files in modern DevOps workflows, including Kubernetes manifests, GitHub Actions CI/CD workflows, Docker Compose stacks, and Ansible playbooks. YAML 1.2 is a strict superset of JSON, meaning any valid JSON document is also valid YAML.
Waveform Audio File Format
Studio Audio Standard
Waveform Audio File Format (WAV) is the standard audio file container developed jointly by Microsoft and IBM in 1991. Built on the RIFF container format, WAV typically stores uncompressed, bit-for-bit lossless audio using Linear Pulse Code Modulation (LPCM). Because no perceptual compression is applied, WAV files preserve complete harmonic fidelity, making WAV the universal recording standard for recording studios, broadcast television, and mastering engineers.
MPEG-1 Audio Layer III
Universal Audio Standard
MPEG-1 Audio Layer III, universally known as MP3, is a lossy audio compression format released in 1993 by the Fraunhofer Society and the Moving Picture Experts Group (MPEG). By leveraging psychoacoustic auditory masking models, MP3 selectively discards sounds that the human brain cannot perceive, reducing the raw data footprint of audio by 75% to 90% while retaining acceptable listening quality.
Markdown Text Document
Technical Documentation Standard
Markdown is a lightweight markup language with plain-text formatting syntax designed in 2004 by John Gruber and Aaron Swartz. Created to be easy-to-read and easy-to-write in raw form, Markdown documents can be converted into valid, semantic XHTML or HTML. Today, standardized variants like CommonMark and GitHub Flavored Markdown (GFM) form the foundation of software documentation, static site generators, and developer communication.
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