FreeFormatter

CSS Minifier

Compresses CSS by stripping whitespace, comments, and shortening values where safe to do so.

CSV Escape

Escapes fields for safe inclusion in CSV output, handling commas, quotes, and newlines per RFC 4180.

Credit Card Number Validator

Validates credit card numbers using the Luhn algorithm and generates valid-format fake numbers for testing payment fo...

Cron Expression Generator (Quartz)

Builds and explains Quartz-style cron expressions in plain English, with a generator for common schedules.

HTML Entities Reference

Complete list of HTML entities with their numeric codes, named entries, and the ASCII characters they represent.

HTML Formatter

Formats HTML source with consistent indentation and line breaks, making nested markup easier to read.

JSON Escape

Escapes strings for safe inclusion in JSON values, handling quotes, control characters, and backslashes.

JSON Formatter

Formats a JSON string or file with configurable indentation, producing a colour-highlighted object tree for inspection.

Java and .NET Escape

Escapes strings for safe embedding in Java or .NET source code, preventing compilation errors from quotes and backsla...

JavaScript Escape

Escapes strings for safe embedding in JavaScript source, handling quotes, backslashes, and Unicode characters.

JavaScript Minifier

Compresses JavaScript by removing whitespace and comments with no behavioural side effects.

MIME Types List

Complete reference of MIME types with their descriptions and example file extensions, sourced from the IANA registry.

QR Code Generator

Generates QR codes for URLs, contact cards, email links, and Wi-Fi credentials, with customisable size.

SQL Escape

Escapes string literals for safe inclusion in SQL queries — though prepared statements are preferred for production use.

String Utilities

A collection of common string operations — case conversion, character/word counts, and reversal — in one tool.

URL Encoder & Decoder

Percent-encodes URL components per RFC 1738 and decodes percent-encoded strings back to plain text.

URL Parser / Query String Splitter

Parses URLs into their components and splits query strings into a key-value table for inspection.

XML Formatter

Pretty-prints XML with adjustable indentation, useful for inspecting deep configuration files or API payloads.

i18n Standards Reference

Reference for date, currency, and number formatting standards across locales, with code snippet examples.

CSS Beautifier

Formats CSS for readability with configurable indentation and one rule per line, the inverse of minification.

HTML Validator

Validates HTML for well-formedness and W3C compliance, reporting structural and accessibility issues.

JSON Validator

Validates a JSON string against RFC 4627 and the JavaScript language specification, surfacing parse errors with locat...

Java Regular Expression Tester

Tests regular expressions using Java's Pattern class semantics (Java 8.0), useful for server-side validation work.

Base64 to ASCII

This page includes both Base64 encoding and decoding in one interface, letting users decode Base64 into readable text...

Base64 to Binary

Its Base64 encoder/decoder supports decoding Base64 content and includes a decode-and-download option for binary file...

Base64 to CSS

Its Base64 encoder/decoder can decode Base64 strings and supports decode-and-download for file output workflows. That...

Base64 to HTML

While presented as a Base64 encoder/decoder, this free tool can decode Base64-encoded HTML content back to readable m...

Base64 to Text

CSV to JSON Converter

Converts CSV to JSON with configurable quote, delimiter, and header-row handling.

CSV to XML Converter

Converts CSV files to XML using a configurable snippet template, suitable for legacy system imports.

Epoch Timestamp to Date Converter

Converts between Unix/epoch timestamps and human-readable date strings, with timezone selection.

JSON to XML Converter

Converts JSON to XML, with configurable root element name and array-handling rules.

Base64 Encoder & Decoder

Encodes and decodes data per RFC 4648 Base64, with options for URL-safe alphabet and file input.

HMAC Generator

Computes HMAC signatures from a message and secret key using selectable hash algorithms.

Message Digest Generator

Computes message digests using MD5, SHA-1, SHA-256, SHA-512, and other algorithms for integrity checks.

JSON to YAML Converter

Converts JSON to YAML with colour-highlighted output, the inverse of the YAML-to-JSON conversion.

Lorem Ipsum Generator

Generates customisable Lorem Ipsum placeholder text with optional HTML markup for design and development mockups.