MIME Type Lookup
Find the MIME type for any file extension, or the extensions for a type.
Developer Tools
Format, encode and hash without leaving the tab.
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My User Agent
See your own user agent string and what a server can tell from it.
User Agent Parser
Break a user agent string into browser, engine, operating system and device.
JWT Verifier
Check a JWT signature against a secret or a public key, and see why it fails.
JWT Generator
Build and sign a JWT with HS256, HS384 or HS512 for testing.
Unicode Code Point Lookup
Inspect any character: code point, block, category, UTF-8 bytes and escapes.
Markdown to HTML
Render Markdown to clean HTML, with tables, task lists and fenced code.
CSV to SQL
Turn a CSV export into INSERT statements, with column types inferred.
JSON to ENV
Flatten a JSON config into .env lines with correct quoting and naming.
JSON Schema Validator
Validate a JSON document against a draft-07 schema and see every failure by path.
JSON Sorter
Sort JSON object keys alphabetically at every level, or sort arrays by a field.
JSON Validator
Check JSON syntax and get the exact line, column and cause of any error.
Whitespace Visualizer
Reveal tabs, non-breaking spaces and zero-width characters in your text.
Screen Resolution Checker
Your screen size, viewport, pixel ratio and which breakpoint is active.
Variable Name Converter
Convert a name between camelCase, snake_case, kebab-case and the rest.
IP Range to CIDR
Convert a start and end address into the smallest set of CIDR blocks.
IP to Binary Converter
See an IP address in binary, hex and decimal, octet by octet.
Clip Path Generator
Draw a clipping shape with draggable points and get the CSS.
Neumorphism Generator
Build soft extruded UI with paired light and dark shadows.
Query String Builder
Build and edit URL query strings without breaking the encoding.
curl to Code Converter
Turn a curl command into working fetch, axios, Python, PHP, Go or Ruby.
UUID Decoder
Identify a UUID's version and variant, and extract its timestamp.
Htpasswd Generator
Generate .htpasswd lines with bcrypt, APR1-MD5 or SHA-1.
SQL Minifier
Collapse a SQL query to one line and strip its comments.
SQL Formatter
Re-indent a SQL query into readable clauses, joins and conditions.
XML to JSON
Convert XML into clean JSON, with attributes and text handled predictably.
JSON to C# Class
Generate C# classes with System.Text.Json attributes from a JSON sample.
JSON to PHP Array
Convert JSON into a PHP array literal or a typed class you can paste into a project.
Relative Time Calculator
Work out the gap between two dates, in every unit including working days.
ISO 8601 Converter
Convert a date into every ISO 8601 form, including week and ordinal dates.
IEEE 754 Converter
See a float’s sign, exponent, mantissa and its exact decimal value.
Fake Data Generator
Generate realistic test rows in JSON, CSV or SQL from fields you choose.
Cron Expression Parser
Read a cron expression in plain English and see when it next runs.
CSS Units Converter
Convert between px, rem, em, pt, %, vw and vh with the right context.
Glassmorphism Generator
Build a frosted glass panel with backdrop blur, over a real background.
Cookie Parser
Parse Set-Cookie and Cookie headers, and check the security flags.
HTTP Status Codes
Every HTTP status code, searchable, with what it actually means.
Punycode Converter
Convert internationalised domain names to punycode and back.
Data URI Generator
Turn text, SVG or a small file into a data: URI you can inline anywhere.
Hex to Base64
Convert a hexadecimal string to Base64, standard or URL-safe.
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