Format & Technology Comparisons

WebP is generally the better choice for web images — it produces files 25–35% smaller than PNG while supporting transparency, lossless mode, and animation. PNG remains the safe pick when you need universal compatibility or are targeting non-web environments.

AVIF typically produces files 20–50% smaller than WebP at equivalent quality, making it the superior format for compression. However, WebP has wider browser support and encodes much faster, making it the safer default for most projects.

Use JPG for photographs where file size matters — it produces 5–10× smaller files than PNG with little visible quality loss. Use PNG for logos, screenshots, and any image requiring transparency, since PNG is lossless and preserves every pixel.

UUID v4 is the safe default — it is universally supported and has no predictable pattern. ULID is better when you need time-sortable IDs for database indexing, as it encodes a millisecond-precision timestamp in the first 10 characters, enabling natural chronological ordering.

JSON is the right choice for APIs and data interchange — it is fast to parse, strictly defined, and supported natively in every language. YAML is preferred for human-maintained configuration files (CI/CD pipelines, Kubernetes, Docker Compose) because of its cleaner syntax and comment support.

Base64 and URL encoding solve different problems. Base64 is used to represent binary data (images, files) as safe ASCII text — commonly in data URIs and email attachments. URL encoding (percent-encoding) escapes characters that have special meaning in URLs, like spaces and &, for use in query parameters.