Hash text using MD5, SHA-1, SHA-256, SHA-512, or other algorithms

Generate HMAC signature for text with a secret key

Encode/decode text: base64, URL, hex, HTML entity encoding

Convert text between camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE, Title Case, and more

Convert text to a URL-safe slug

Count words, characters, sentences, and estimate reading time

Extract emails, URLs, numbers, hashtags, mentions, or phone numbers from text

Format, validate, and pretty-print JSON

Compare two JSON objects and show differences

Query JSON with dot-notation path (e.g. 'users.0.name')

Test a regular expression against text and see matches

Explain a regular expression in plain English

Format and pretty-print SQL queries

Extract tables, columns, JOINs, and structure from a SQL query

Parse a cron expression into human-readable description and compute next run times

Decode a JWT token to see its header, payload, and expiration

Parse, compare, or check if a version satisfies a range (npm-style ^, ~, >=, etc.)

Look up HTTP status code meaning, category, and usage guidance

Compare two texts and show a unified diff

Convert CSV data to JSON array

Convert YAML to JSON

Convert JSON to YAML

Generate UUID (v4 or v7) or ULID identifiers

Generate secure random passwords or passphrases

Generate lorem ipsum placeholder text

Generate realistic fake data for testing — people, addresses, companies, etc.

Generate a QR code from text or URL (returns base64 PNG or SVG)

Validate an email address — syntax, MX records, disposable detection, typo suggestions

Generate color palettes — complementary, analogous, triadic, split-complementary, and more

Check WCAG color contrast ratio between foreground and background colors

Test if a file path matches a glob pattern (supports *, **, ?, character classes, brace expansion)

Get current time in any timezone with various format options

Calculate the difference between two dates/times

Validate an IP address and identify version (IPv4/IPv6), type, and range

Calculate network details from CIDR notation — range, broadcast, host count

Convert Markdown to HTML

Extract table of contents from a Markdown document