Wizzy Dev Tools

Format and validate JSON online

Paste JSON to pretty-print, minify, and validate it instantly in your browser.

Base64 encode or decode text online

Convert text to and from Base64 instantly in your browser, with full Unicode support.

URL encode or decode a string online

Percent-encode or decode a URL or query string component instantly in your browser.

Generate random UUIDs (v4)

Generate one or many cryptographically random v4 UUIDs instantly in your browser.

Generate MD5 and SHA hashes online

Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes of any text in your browser.

Decode a JWT online

Paste a JSON Web Token to instantly view its decoded header and payload in your browser.

Convert a Unix timestamp to a date

Convert a Unix timestamp to a human-readable date, or a date back to a timestamp, in your browser.

Test a regular expression online

Test a JavaScript regular expression against sample text and see every match highlighted live.

Format and beautify XML online

Pretty-print or minify XML instantly in your browser, with adjustable indentation.

Format and re-indent YAML online

Normalize inconsistent YAML indentation to a consistent width instantly in your browser.

Format and beautify SQL online

Pretty-print or minify a SQL query instantly in your browser, with clause-based line breaks.

Format and beautify HTML online

Pretty-print or minify HTML instantly in your browser, with adjustable indentation.

Format and minify CSS online

Pretty-print or minify CSS instantly in your browser, with adjustable indentation.

Format and minify JavaScript online

Pretty-print or minify JavaScript instantly in your browser, correctly handling strings, template literals, regex, and comments.

Compare two texts and see the differences

Paste two blocks of text to see every added and removed line highlighted, instantly in your browser.

Parse a cron expression and see its next run times

Paste a 5-field cron expression to get a plain-English summary and the next 5 run times, in your browser.

Parse a User-Agent string online

Paste a browser User-Agent string to see its browser, operating system, and device type, in your browser.

Parse and view HTTP headers online

Paste raw HTTP request or response headers to see them parsed into a labeled table, in your browser.

Build a curl command online

Build a shell-safe curl command from a method, URL, headers, and body, in your browser.

Encode or decode HTML entities online

Convert text to and from HTML entities instantly in your browser.

Convert text case online

Convert text to camelCase, PascalCase, snake_case, kebab-case, Title Case, UPPER, and lower, instantly in your browser.

Generate a URL-friendly slug

Convert any text into a clean, URL-safe slug instantly in your browser.

Generate Lorem Ipsum placeholder text

Generate paragraphs, sentences, or words of Lorem Ipsum placeholder text instantly in your browser.

Preview Markdown as HTML live

Paste Markdown to see a live-rendered HTML preview instantly in your browser.

Convert colors between HEX, RGB, and HSL

Convert a color between HEX, RGB, and HSL instantly in your browser, with a live preview.

Convert numbers between bases

Convert a number between binary, octal, decimal, and hexadecimal instantly in your browser.

Escape or unescape a string online

Escape or unescape a string for JS/JSON string literals instantly in your browser.

Convert between CSV and JSON online

Convert CSV to JSON or JSON to CSV instantly in your browser, with full quoted-field support.

Convert between YAML and JSON online

Convert YAML to JSON or JSON to YAML instantly in your browser, covering mappings, sequences, and scalars.

Count words and characters online

Get a live word count, character count, sentence count, and reading time, instantly in your browser.

Sort and de-duplicate lines online

Sort lines alphabetically or by length, remove duplicates, and strip blank lines, instantly in your browser.

Clean whitespace and line endings online

Trim trailing whitespace, collapse repeated blank lines, and normalize line endings, instantly in your browser.

Generate a strong random password

Generate a cryptographically random password with adjustable length and character sets, in your browser.

Generate random numbers online

Generate one or many cryptographically random integers in a range, optionally unique, in your browser.

Convert Unix file permissions

Convert between octal (e.g. 755) and symbolic (rwxr-xr-x) file permission notation, in your browser.

Generate a Markdown table online

Paste comma-separated rows to instantly get a formatted Markdown table, in your browser.

Convert between XML and JSON online

Convert XML to JSON or JSON to XML instantly in your browser, using your browser's own XML parser.

Encode or decode ROT13 and Caesar cipher text

Shift letters by any amount, including the classic ROT13, instantly in your browser.

Encode or decode a Punycode domain

Convert an internationalized domain name to and from its Punycode (xn--) form, in your browser.

Build and sign a JWT online

Build and HMAC-SHA256-sign a JWT from a header, payload, and secret, instantly in your browser.

Calculate a subnet from CIDR notation

Get the network address, broadcast address, subnet mask, and usable host range for any CIDR block, in your browser.

Generate a .gitignore file online

Pick languages, frameworks, and editors to instantly build a combined .gitignore file, in your browser.