Practical utilities that run in your browser — each with a full instructional guide explaining what the tool does, when to use it, and how to interpret results. Nothing requires an account; most tools process data locally for privacy.
Generate SHA-256 and SHA-1 hash values from any text — useful for checksums, integrity verification, and learning how cryptographic hashes work.
Open toolEncode or decode Base64 text online — common for data URLs, API payloads, and embedding small binary data in JSON.
Open toolEncode or decode URL components for safe use in query strings, API requests, and links.
Open toolFormat, validate, and minify JSON — essential for API debugging and configuration files.
Open toolPick colors and convert between HEX and RGB — useful for web design, CSS, and brand consistency.
Open toolConvert between common length, weight, and temperature units for everyday and technical calculations.
Open toolCalculate mean, median, mode, variance, and standard deviation from a list of numbers.
Open toolVisualize word frequency from any text — helpful for spotting themes in essays, sermons, or survey responses.
Open toolResize images in your browser without uploading to a server — privacy-friendly image preparation for web and email.
Open toolMinify CSS by removing whitespace and comments — reduce file size for faster page loads.
Open toolSmall utilities should teach, not just compute. Every tool in this collection includes context on real-world use cases, common mistakes, and links to deeper learning on our tech guides page. Whether you are verifying a file checksum, formatting API JSON, or converting units for a homework assignment, start with the guide below each tool before running your first calculation.