🧰 DevToolkit

Generate cryptographically secure random tokens in hex, base64, or URL-safe format.

Hash text using MD5, SHA-1, SHA-256, SHA-384, or SHA-512.

Hash or verify text using a bcrypt-like scheme (simulated with SHA-256 + salt).

Generate UUIDs (version 1 or version 4).

Generate an HMAC (Hash-based Message Authentication Code).

Analyze password strength — score, entropy, and character composition.

Generate a simulated RSA key pair (placeholder random hex strings).

Compute a checksum (hash) from base64-encoded file content.

Convert YAML to JSON format.

Convert JSON to YAML format.

Convert JSON to TOML format.

Convert TOML to JSON format.

Convert YAML to TOML format.

Convert TOML to YAML format.

Convert XML to JSON format.

Convert JSON to XML format.

Convert a JSON array of objects to CSV.

Convert CSV to a JSON array of objects.

Convert Markdown text to HTML.

Convert a number between bases (2, 8, 10, 16).

Convert between Roman numerals and integers.

Convert text between different cases (upper, lower, title, camel, snake, kebab, pascal).

Convert between list formats (comma, newline, space, tab separated).

Encode text to Base64 or decode Base64 back to text.

Percent-encode or decode a URL / query string.

Escape special characters to HTML entities or unescape them back.

Decode a JWT token without signature verification. Shows header and payload.

Convert internationalized domain names to/from Punycode (ACE) form.

Convert text to Unicode escape sequences (\uXXXX) or back.

Convert text to 8-bit binary representation or binary back to text.

Convert text to hexadecimal representation or hex back to text.

Convert text to the NATO phonetic alphabet representation.

Convert text to Morse code or decode Morse code back to text.

Parse a URL into its components: scheme, host, port, path, query parameters, and fragment.

Look up the meaning of any HTTP status code.

Parse a user-agent string to extract browser, OS, and device information.

Generate a Base64-encoded HTTP Basic Authentication header value.

Convert text to a URL-friendly slug (lowercase, hyphens, no special characters).

Generate Open Graph meta tags for social media sharing.

Decode Microsoft Outlook SafeLink URLs to extract the original URL.

Look up MIME type for a file extension, or find extensions for a MIME type.

Analyze text: character count, word count, line count, sentence count, paragraph count, average word length, and estimated reading time.

Generate lorem ipsum placeholder text.

Compare two texts and show the differences in unified diff format.

Test a regular expression pattern against text. See all matches with groups and positions.

Escape or unescape strings for JSON, HTML, XML, CSV, or regex.

Reverse text by characters or by words.

Remove duplicate lines from text while preserving order.

Sort lines alphabetically or numerically, ascending or descending.

Count how many times a substring appears in text, with positions.

Prettify and format JSON with customizable indentation.

Minify JSON by removing all unnecessary whitespace.

Query JSON with dot notation path (e.g. data.users[0].name).

Format SQL queries with uppercase keywords and proper indentation.

Prettify and indent HTML markup.

Minify CSS by removing comments, whitespace, and newlines.

Basic JavaScript minifier — removes comments and excess whitespace.

Parse and analyze an IP address — version, class, private/public, binary representation.

Calculate network details from CIDR notation — network, broadcast, netmask, host range, total hosts.

Calculate subnet details from an IP address and subnet mask.

Convert an IPv4 address to its IPv6-mapped representation.

Validate and format a MAC address in colon, dash, and dot notation.

Calculate percentages — what percent of total, percentage increase, or percentage decrease.

Convert between common units of length, weight, temperature, and data.

Perform bitwise operations (AND, OR, XOR, NOT, LSHIFT, RSHIFT) and see results in decimal, hex, and binary.

Calculate the Greatest Common Divisor (GCD) and Least Common Multiple (LCM) of two numbers.

Check if a number is prime and find its factors.

Generate cryptographically secure random passwords.

Generate a QR code as a base64-encoded PNG image.

Generate an SVG placeholder image with custom dimensions, colors, and text.

Generate nanoid-style compact, URL-friendly unique IDs.

Generate Universally Unique Lexicographically Sortable Identifiers (ULIDs).

Generate random names, emails, addresses, phone numbers, or company names.

Convert between Unix timestamp and human-readable date/time.

Parse a cron expression to human-readable text and show next 5 run times.

Convert a time from one timezone to another.

Calculate the difference between two dates in days, weeks, months, years, hours, and minutes.

Get ISO week number, day of week, and day of year for a given date.

Convert colors between HEX, RGB, and HSL formats.

Check WCAG contrast ratio between two colors. Reports AA and AAA compliance.

Generate shades (darker) and tints (lighter) of a color.

Calculate Unix chmod value from permissions or reverse — octal to permission breakdown.

Explain a crontab expression in human-readable form and show the next 5 scheduled runs.

Validate basic docker-compose YAML structure — check for services key and basic structure.

Generate random port numbers within a specified range.

Parse .env file content into structured key-value pairs with validation.