Developer Tools

EAN-13 Barcode Generator

Generate an EAN-13 barcode image.

Base Converter

Convert numbers between bases 2-36.

CIDR Range Calculator

Calculate the IP range of a CIDR block.

Cron Expression Parser

Explain a cron expression in plain words.

Current Timestamp

Get the current Unix timestamp.

Date to Timestamp

Convert a date/time to a Unix timestamp.

.env Generator

Generate an environment variable file.

HTTP Status Codes

Look up the meaning of an HTTP status code.

IP to Decimal

Convert an IPv4 address to a decimal number.

JSON Merge

Merge two JSON objects (shallow).

JSON Schema Generator

Generate a JSON Schema from sample JSON.

JSON to Go Struct

Generate Go structs from JSON.

JSON to Python Dict

Convert JSON to a Python dict literal.

JSON to Rust Struct

Generate a Rust struct from JSON.

JSON to TypeScript

Generate TypeScript interfaces from JSON.

JWT Decoder

Decode a JWT header and payload.

MIME Type Lookup

Look up MIME type by extension and vice versa.

NPM Package Name Generator

Generate a random npm package name.

Common Regex Patterns

Browse common regular expression patterns.

Regex Tester

Test a regular expression against text.

Semantic Versioning

Learn semantic versioning rules.

String Hash

Compute FNV-1a and CRC32 hashes.

Subnet Calculator

Calculate subnet details from IP and mask.

Timestamp to Date

Convert a Unix timestamp to a readable date.

Timezone List

Browse common IANA timezones.

ULID Generator

Generate sortable ULID identifiers.

Unicode Lookup

Get code point and UTF-8 bytes of a character.

URL Parser

Break a URL into its components.

User Agent Parser

Parse a User-Agent string into browser and OS.

UUID Generator

Generate random UUID v4 identifiers.

UUID v1 (Time-based)

Generate time-based UUID v1.

axios Request Generator

Generate an axios snippet.

Bytes Formatter

Convert bytes between B, KB, MB, GB and more.

Changelog Template

Generate a changelog template.

Char Code Converter

Convert between characters and code points.

Country List

Browse all country names.

CSS Flexbox Generator

Generate flexbox CSS from options.

CSS Grid Generator

Generate CSS grid from options.

CSS Properties Reference

Browse common CSS properties.

CSS Selectors Reference

Browse CSS selector syntax.

Decimal to IP

Convert a decimal number to an IPv4 address.

Docker Commands Cheatsheet

Browse common Docker commands.

Dockerfile Generator

Generate a Dockerfile template.

Git Branch Naming

Browse Git branch naming conventions.

Git Commands Cheatsheet

Browse common Git commands.

.gitignore Template

Generate a .gitignore template.

HTML Color Names

Browse standard HTML color names.

HTML Entities Reference

Browse common HTML entities.

HTML Tags Reference

Browse common HTML tags.

HTTP Headers Reference

Browse common HTTP headers.

fetch Request Generator

Generate a JavaScript fetch snippet.

JavaScript Reserved Words

Browse JavaScript reserved words.

JSON Diff

Compare two JSON objects and find differences.

JSON to C# Class

Generate C# classes from JSON.

JSON to Dart Class

Generate a Dart class from JSON.

JSON to Elixir Map

Convert JSON to an Elixir map literal.

JSON to GraphQL Type

Generate a GraphQL type from JSON.

JSON to Java Class

Generate Java POJO from JSON.

JSON to JS Object

Convert JSON to a JavaScript object literal.

JSON to Kotlin Class

Generate a Kotlin data class from JSON.

JSON to Mongoose Schema

Generate a Mongoose schema from JSON.

JSON to PHP Array

Convert JSON to a PHP array literal.

JSON to Ruby Hash

Convert JSON to a Ruby hash literal.

JSON to SQL CREATE TABLE

Generate a CREATE TABLE statement from JSON.

JSON to Swift Struct

Generate Swift struct from JSON.

Keyboard Keycodes

Browse common keyboard keycodes.

Levenshtein Distance

Measure the edit distance between two strings.

License Generator

Generate a license text (MIT/Apache).

License Selector

Compare open source licenses.

Markdown Cheatsheet

Browse Markdown syntax reference.

Markdown Link Generator

Generate a Markdown link.

Markdown Table Generator

Generate a Markdown table from CSV.

Markdown TOC Generator

Generate a table of contents from headings.

Nano ID Generator

Generate compact Nano IDs.

Number Formatter

Format numbers with thousands separators.

package.json Generator

Generate a package.json file.

Python Keywords

Browse Python keywords.

Python requests Generator

Generate a Python requests snippet.

README Generator

Generate a README template.

Regex Cheatsheet

Browse regex syntax reference.

Regex Escape

Escape special characters for use in regex.

Snowflake ID

Generate Twitter-style snowflake IDs.

SQL Keywords Reference

Browse common SQL keywords.

Text Compare

Check if two texts are identical.

Text Diff

Compare two texts line by line.

Unicode Normalizer

Normalize Unicode text (NFC/NFD/NFKC).

UTF-8 Validator

Check if a byte string is valid UTF-8.

UUID v3 (MD5)

Generate name-based UUID v3 (MD5).

UUID v5 (SHA-1)

Generate name-based UUID v5 (SHA-1).

Variable Name Generator

Generate variable names in multiple styles.