Base64 / URL Encoder-DecoderInstant round-trip encoding for text blobs, images via File APIbase64url+7
GA4 Regex BuilderGenerate GA4-compatible regex patterns from lists of paths or events with RE2 compatibilityga4regex+7
HTML Entities Encoder/DecoderConvert between raw characters and HTML entities for safe display and storagehtmlentities+7
JSON-LD Entity ValidatorValidate and preview JSON-LD schema for entity-based indexing with Schema.org supportjson-ldschema+7
Markdown ↔ HTML ConverterConvert between Markdown and HTML formats with live preview, syntax highlighting, and sanitizationmarkdownhtml+8
Pixel to Millimeter ConverterConvert between pixels and millimeters based on DPI for design and print applicationspixelsmillimeters+7
PNG → WebP OptimizerConvert PNG images to optimized WebP format with size savings display using browser-image-compressionpngwebp+7
Random Number GeneratorGenerate random numbers within a specified range with customizable quantity and decimal precisionrandomnumber+7
Regex TesterLive regex pattern testing with match highlighting and captured groups displayregexpattern+7
Side-by-Side Text DiffVisual diff viewer comparing two text blocks with character and line-level highlightingdifftext+7
Slug-Case ConverterConvert headlines to URL-safe slugs with German umlaut support and smart formattingslugurl+7