JWT Generator
Build and sign a JWT with HS256, HS384 or HS512 for testing.
Developer Tools
Format, encode and hash without leaving the tab.
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Base64 to Hex
Convert Base64 back to hexadecimal, with your choice of separator.
XML Formatter
Pretty-print XML with clean indentation, or collapse it back to one line.
JSON to Python Dataclass
Generate Python dataclasses with type hints from a sample JSON document.
JSON Schema Validator
Validate a JSON document against a draft-07 schema and see every failure by path.
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.
Neumorphism Generator
Build soft extruded UI with paired light and dark shadows.
MIME Type Lookup
Find the MIME type for any file extension, or the extensions for a type.
RSA Key Generator
Generate an RSA key pair in PEM form, in your browser.
Data URI Generator
Turn text, SVG or a small file into a data: URI you can inline anywhere.
ENV to JSON
Turn a .env file into JSON, with quotes, exports and comments handled.
URL Encoder & Decoder
Percent-encode URLs and query strings, or decode them back to plain text.
Whitespace Visualizer
Reveal tabs, non-breaking spaces and zero-width characters in your text.
Relative Time Calculator
Work out the gap between two dates, in every unit including working days.
Random User Generator
Generate complete fake user profiles for seeding and design work.
Cron Expression Parser
Read a cron expression in plain English and see when it next runs.
Clip Path Generator
Draw a clipping shape with draggable points and get the CSS.
CSV to XML
Convert CSV rows into XML records with named root and row elements.
JSON to XML
Convert JSON into XML, with control over attributes, arrays and the root element.
MAC Address Generator
Generate MAC addresses that are correctly marked as locally administered.
Regex Cheatsheet
Every regex token, searchable, with an example of what it matches.
CSS Units Converter
Convert between px, rem, em, pt, %, vw and vh with the right context.
JSON to TOML
Turn a JSON object into a TOML document with proper tables and arrays of tables.
YAML Formatter
Normalise YAML indentation, quoting and key order in one pass.
JSON to PHP Array
Convert JSON into a PHP array literal or a typed class you can paste into a project.
CORS Header Generator
Generate correct CORS headers, and understand why the request was blocked.
Punycode Converter
Convert internationalised domain names to punycode and back.
INI to JSON
Convert an INI or config file into structured JSON, sections and all.
JSON to GraphQL Schema
Draft a GraphQL type definition from a sample JSON response.
Query String to JSON
Turn a URL query string into structured JSON, including nested and repeated keys.
IP Range to CIDR
Convert a start and end address into the smallest set of CIDR blocks.
Glassmorphism Generator
Build a frosted glass panel with backdrop blur, over a real background.
EditorConfig Generator
Make every editor agree on indentation, line endings and charset.
YAML to JSON
Convert YAML config into JSON and see exactly how each value was typed.
JSON Escape & Unescape
Turn any text into a JSON string literal, or unwrap one back to plain text.
JSON Viewer
Explore a JSON document as a collapsible tree with paths you can copy.
JSON to Kotlin Data Class
Generate Kotlin data classes with Gson or kotlinx.serialization annotations.
User Agent Parser
Break a user agent string into browser, engine, operating system and device.
Markdown to HTML
Render Markdown to clean HTML, with tables, task lists and fenced code.
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