Free online tools
for developers

JSON Formatter

Formats a JSON string or file with the chosen indentation level, creating a colour-highlighted, collapsible tree so you…

XML Formatter

Formats an XML string or file with your desired indentation level using a per-element indentation pattern for the best …

HTML Formatter

Formats an HTML string or file with your desired indentation level. Inline content in elements such as span and div is …

SQL Formatter

Formats any SQL query with your desired indentation level, even if the statement is invalid. Change the case of keyword…

XML Validator

Validates an XML string or file against the specified XSD schema. Well-formedness is checked first, then the document i…

JSON Validator

Validates a JSON string against RFC 8259 and the JavaScript language specification. Configure the validator to be stric…

HTML Validator

Validates HTML documents for well-formedness and best practices: finds missing or unbalanced tags, unknown elements, du…

XPath Tester

Test your XPath expressions against an XML document. Supports XPath functions (string(), number(), name(), string-lengt…

Credit Card Number Generator & Validator

Validate a credit card number with the Luhn algorithm and identify its issuer, or generate fake, Luhn-valid test number…

Regular Expression Tester

Test your JavaScript regular expressions against any text and clearly highlight all matches and capture groups. Include…

Java Regular Expression Tester

Test Java regular expressions (java.util.regex) against any input, highlight all matches, and try replaceFirst / replac…

Cron Expression Generator (Quartz)

Generate a Quartz cron expression with an easy to use interface, convert a cron expression into readable text that expl…

XSD Generator

Generates an XSD (XML Schema) from an XML document. The generator uses a smart approach to infer data types and support…

XSLT (XSL Transformer)

Transform an XML document using an XSL stylesheet (XSLT 1.0). Fully supports XML namespaces and lets you choose the ind…

XML to JSON Converter

Convert an XML file into JSON. Attributes are prefixed (@ by default), sequences of similar elements become arrays and …

JSON to XML Converter

Convert a JSON file into XML. A default root element is created, JSON array entries become individual XML elements and …

CSV to XML Converter

Convert a CSV file into XML using a template with ##1##, ##2##… placeholders applied to every line of the CSV.

CSV to JSON Converter

Convert a CSV file into a JSON array. Each line becomes an object and each column a property, using the header line as …

YAML to JSON Converter

Convert a YAML document into JSON with your preferred indentation and brace style.

JSON to YAML Converter

Convert a JSON document into clean, readable YAML.

Epoch Timestamp To Date

Convert an epoch / Unix timestamp into a human readable date and vice-versa. Displays the current epoch time in seconds…

Url Encoder & Decoder

Encodes or decodes a string so that it conforms to the URL specification (RFC 3986 / RFC 1738). All reserved characters…

Base 64 Encoder & Decoder

Encodes or decodes a string or a binary file so that it conforms to the Base64 Data Encodings specification (RFC 4648).…

Convert File Encoding

Change the encoding of a file, for example from ISO-8859-1 to UTF-8 or from UTF-8 to UTF-16. Also auto-detects the enco…

Message Digester (MD5, SHA-256, SHA-512)

Compute a message digest (hash) from a string or file using MD2, MD4, MD5, SHA-1, SHA-224, SHA-256, SHA-384, SHA-512, S…

HMAC Generator

Compute a Hash-based Message Authentication Code (HMAC) using a secret key and MD5, SHA-1, SHA-256, SHA-512, RIPEMD or …

QR Code Generator

Generate QR codes for URLs, address books (vCard), events (vEvent), emails, geo coordinates, phone numbers, SMS, plain …

JavaScript Beautifier

Formats JavaScript files with the chosen indentation level and brace style: collapsed, expanded or expanded with new li…

JavaScript Minifier

Compresses JavaScript with no side-effects: removes whitespace and comments, shortens local variable names and applies …

CSS Beautifier

Formats CSS files with the chosen indentation level for optimal readability.

CSS Minifier

Compresses a CSS string or file with no possible side-effect: strips comments and whitespace, removes the last semicolo…

String Utilities

Handy string utilities: upper/lower case, reverse, character and word count, string splitter and detailed character inf…

HTML Escape

Escapes or unescapes an HTML string, replacing characters that could be wrongfully interpreted as markup with their HTM…

XML Escape

Escapes or unescapes an XML string, replacing the five reserved characters with their corresponding XML entities.

Java and .Net Escape

Escapes or unescapes a Java or .Net string, replacing characters that could prevent compiling with their escape sequenc…

JavaScript Escape

Escapes or unescapes a JavaScript string, replacing characters that could prevent interpretation with their escape sequ…

JSON Escape

Escapes or unescapes a JSON string, replacing characters that could prevent parsing with their escape sequences.

CSV Escape

Escapes or unescapes a CSV value, quoting values that contain commas, newlines or double quotes, and doubling embedded …

SQL Escape

Escapes or unescapes a SQL string, doubling single quote characters that could prevent execution.

Lorem Ipsum Generator

Generate placeholder text: choose how many paragraphs, sentences, words or list items you want, the item length and whe…

List of MIME types

A complete, searchable list of MIME types / Internet media types with their names, file extensions and links to more de…

HTML Entities

Complete list of HTML entities with their names, numbers and descriptions, including printable ASCII characters, ISO-88…

Url Parser / Query String Splitter

Parse a URL into its components (scheme, protocol, userinfo, host, port, subdomain, domain, TLD, path, file, query stri…

I18N Standards / Code Snippets

Internationalization reference: ISO country codes, US states, Canadian provinces, Mexican states and time zone lists as…