21 tools available — and growing.
Create structured AI prompts with automatic variable forms, XML tag encapsulation, token estimation, and model-specific optimization adapters.
Generate random UUID v4 or time-ordered UUID v7 values instantly in your browser. Supports custom quantities, bulk copy, and various format tweaks.
Generate QR codes from any text or URL right in your browser. Customizable size, error correction, and one-click PNG download.
Build, visualize, and understand cron expressions. Features a visual grid, human-readable description, next executions, and platform code generation.
Convert files (images, PDFs, fonts) or text to Base64 strings and decode them back. Zero server uploads, 100% private in-browser tool.
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text. Runs entirely in your browser — no data sent to any server.
Decode JSON Web Tokens in your browser. Inspect header, payload, expiry, and standard claims. Decoding only — no signature verification, no upload.
Encode and decode Base64, Base64URL, and URL-encoded (percent-encoded) text in your browser. Unicode-safe, instant, zero upload.
Convert CSV to JSON and JSON to CSV instantly. Support for nested flattening, custom delimiters, and smart type parsing completely in-browser.
Convert mock JSON to JSON Schema and compile adapters for OpenAI Strict Structured Outputs, Gemini responseSchema, and Anthropic Tools.
Convert JSON to YAML and back. Bidirectional, in-browser, with indent control and type-safe round-trips.
Convert Java .properties files to YAML and back. Bidirectional, in-browser, with dot-key nesting, array support, and type inference.
Convert JSON to Java .properties and back. Bidirectional, in-browser, with dot-key nesting, array support, and type inference.
Convert colors between HEX, RGB, HSL, HSV, and CMYK formats instantly in your browser. Features a live color picker, contrast checker, and bulk copy.
Convert numbers between binary, octal, decimal, hex, base32, and base64 formats instantly in your browser. Supports arbitrary-precision big integers.
Convert Markdown to HTML and HTML to Markdown instantly in your browser. Live preview, one-click copy, and fully local processing.
Convert between Unix timestamps and human-readable dates. Side-by-side local-time and UTC views with a one-click Now button, fully client-side.
Format and beautify SQL queries with support for 20+ dialects including MySQL, PostgreSQL, SQLite, and more. Fully local, instant output.
Format, beautify, minify, and validate JSON in your browser. Detailed error positions, configurable indent, sort keys, and one-click copy.
Test and explain JavaScript regular expressions in real-time. Match highlighting, capture groups, and plain-English explanations.
Compare two texts side by side or in unified view. Line-by-line add/remove highlighting with instant results — fully client-side.