Base32 Encoder & Decoder
Encode and decode Base32, including the Crockford and hex variants.
Developer Tools
Format, encode and hash without leaving the tab.
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TOML to JSON
Convert a TOML config to JSON, with tables and arrays of tables resolved.
XML Minifier
Strip whitespace and optionally comments from XML, and see the bytes saved.
XML Validator
Check XML is well-formed and find the exact tag that breaks it.
JSON to Kotlin Data Class
Generate Kotlin data classes with Gson or kotlinx.serialization annotations.
Browser Info Checker
Your browser, engine, platform, languages and what it supports.
HTML to JSX
Convert HTML into valid JSX, with every attribute renamed correctly.
CSS Specificity Calculator
Score a selector and find out which of two rules actually wins.
Media Query Generator
Build media queries with framework breakpoints and modern features.
Flexbox Generator
Learn and generate flexbox layouts with a live, interactive preview.
UUID v7 Generator
Generate time-ordered UUID v7 identifiers that index cleanly.
RSA Key Generator
Generate an RSA key pair in PEM form, in your browser.
HMAC Generator
Generate HMAC signatures with SHA-1, SHA-256, SHA-384 or SHA-512.
CSV to Markdown Table
Convert CSV or a spreadsheet paste into a padded Markdown table.
JSON to YAML
Convert JSON to clean, correctly quoted YAML in one step.
JSON to Rust Struct
Generate serde-ready Rust structs from a sample JSON document.
JSON to Dart Class
Generate Dart model classes with fromJson and toJson from a sample payload.
JSON to Java Class
Generate Java POJOs or records with Jackson annotations from JSON.
JSON to TypeScript
Generate TypeScript interfaces from a sample JSON payload.
Query String to JSON
Turn a URL query string into structured JSON, including nested and repeated keys.
JSON Diff
Compare two JSON documents structurally and see exactly which paths changed.
MAC Address Generator
Generate MAC addresses that are correctly marked as locally administered.
Random User Generator
Generate complete fake user profiles for seeding and design work.
SVG to JSX
Turn an SVG into a React component with the attributes React expects.
Border Radius Generator
Shape corners individually, including the elliptical slash syntax.
Password Strength Checker
Estimate how long a password would survive, and see exactly what weakens it.
ENV to JSON
Turn a .env file into JSON, with quotes, exports and comments handled.
YAML Formatter
Normalise YAML indentation, quoting and key order in one pass.
JSON to Python Dataclass
Generate Python dataclasses with type hints from a sample JSON document.
JSON Lines Converter
Convert between JSON arrays and NDJSON, one compact document per line.
MAC Address Formatter
Reformat a MAC address between every notation, and decode what it means.
Regex Cheatsheet
Every regex token, searchable, with an example of what it matches.
Basic Auth Generator
Build an HTTP Basic Authorization header from a username and password.
TSV to JSON
Convert tab-separated data — or a spreadsheet paste — straight into JSON.
CSV to XML
Convert CSV rows into XML records with named root and row elements.
INI to JSON
Convert an INI or config file into structured JSON, sections and all.
JSON to TOML
Turn a JSON object into a TOML document with proper tables and arrays of tables.
YAML to JSON
Convert YAML config into JSON and see exactly how each value was typed.
JSON to XML
Convert JSON into XML, with control over attributes, arrays and the root element.
JSON to Query String
Serialise a JSON object into a percent-encoded URL query string.
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