API Tools

Format and beautify source code in Python, JSON, XML, HTML, and SQL.

Format numbers as decimals, currencies, percentages, or scientific notation with locale support.

Format and beautify SQL queries with configurable indentation and keyword casing.

Convert numbers between any bases (2–36) with binary, octal, decimal, and hex output

Convert between octal and symbolic Unix file permission notation

Convert colors between HEX, RGB, HSL, HSV, and CMYK with WCAG contrast ratios

Parse, reformat, and convert dates between timezones and formats.

Parse .env files into structured key-value pairs with error detection

Flatten nested JSON objects to dot-notation keys or unflatten them back.

Generate a JSON Schema from sample JSON data.

Convert between Unix timestamps, ISO 8601, RFC 2822, and relative time formats

Generate realistic fake data — emails, names, addresses, IPs, and more.

Render Liquid templates with variables — inline or from a remote URL.

Generate placeholder text by paragraphs, sentences, or word count.

Generate realistic fake data with 50+ field types, output as JSON, CSV, SQL, or XML.

Reverse-engineer a mock data schema from a sample JSON object.

Generate cryptographically secure passwords with configurable character sets.

Generate UUIDs, ULIDs, and Nano IDs in bulk.

Lint and validate CSV data for structural issues like ragged rows and empty lines.

Validate JSON data against a JSON Schema definition.

Validate JSON strings and get pretty-printed or minified output.

Validate TOML strings and convert to JSON.

Validate XML well-formedness and optionally check against an XSD schema.

Validate YAML strings and convert to JSON.

Sort, deduplicate, intersect, diff, chunk, and manipulate arrays.

Calculate the next N execution times for a cron expression

Parse cron expressions into human-readable descriptions with upcoming schedules

Compare two texts and get a unified diff with change summary.

Compare two JSON objects and get an RFC 6902 JSON Patch of the differences.

Query and transform JSON data using JMESPath expressions.

Query JSON data using JSONPath expressions and get matching results.

Safely evaluate mathematical expressions with variables and built-in functions.

Extract all matches and capture groups from text using a regex pattern

Test regular expressions against text with match details and plain-English explanations

Compare and sort semantic version strings

Parse user-agent strings into browser, OS, device details, and device type classification

Convert text into URL-friendly slugs with configurable separator and length.

Escape or unescape text for shell, regex, JSON, SQL, or XML contexts.

Truncate text to a maximum length with smart word boundary breaking.

Count words, characters, sentences, paragraphs, and estimate reading time.