Answers
Quick answers to common developer tasks
Short, example-backed answers to the things developers look up — each one links straight to a free tool that does it in your browser.
How to Base64 encode a string
Base64-encode any text or string for free, instantly, in your browser — nothing is uploaded.
Base64How to decode a Base64 string
Decode Base64 back to plain text instantly in your browser. Free, private, no uploads.
Base64How to decode a JWT token
Decode and inspect a JWT — header, payload, and claims — instantly in your browser. Nothing is uploaded.
JWT DecoderHow to convert a Unix timestamp to a date
Convert a Unix epoch timestamp to a human-readable date and time, in UTC or your local zone.
Unix TimestampHow to convert JSON to YAML
Convert JSON to clean, valid YAML instantly in your browser. Free, private, no uploads.
YAML to JSONHow to convert YAML to JSON
Convert YAML to valid JSON instantly in your browser. Free, private, nothing uploaded.
YAML to JSONHow to convert JSON to CSV
Turn a JSON array of objects into CSV instantly in your browser. Free, private, no uploads.
JSON-CSV ConverterCron expression examples (and how to read them)
Common cron expression examples explained, plus a tool that translates any schedule into plain English.
Cron ExpressionHow to generate a UUID (v4)
Generate random UUID v4 identifiers instantly in your browser. Free, private, generate one or many.
UUID GeneratorHow to URL-encode a string
Percent-encode text for safe use in URLs and query strings, instantly in your browser.
URL Encoder AdvancedHow to generate a SHA-256 hash of a string
Generate the SHA-256 hash of any text instantly in your browser. Free, private, nothing uploaded.
Hash GeneratorHow to convert hexadecimal to decimal
Convert hexadecimal numbers to decimal (and binary, octal) instantly in your browser.
Number BaseHow to convert a HEX color to RGB
Convert a hex color code to RGB (and HSL, HSV) instantly in your browser, with a live preview.
Color ConverterHow to format (beautify) JSON
Pretty-print, validate, and minify JSON instantly in your browser. Free, private, nothing uploaded.
JSON FormatterHow to convert JSON to a TypeScript interface
Generate TypeScript interfaces or types from a JSON sample instantly in your browser.
JSON to TypeScriptHow to generate a strong password
Generate strong, random passwords in your browser with adjustable length and character sets.
Password GeneratorHow to hash a password with bcrypt
Generate and verify bcrypt password hashes in your browser. Adjustable cost factor, nothing uploaded.
Bcrypt GeneratorHow to convert text to camelCase, snake_case, or kebab-case
Convert text between camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE and more, instantly.
Case ConverterHow to create a URL slug from a string
Turn any title or string into a clean, URL-safe slug instantly in your browser.
SlugifyHow to escape HTML special characters
Encode and decode HTML entities so text displays literally instead of being parsed as markup.
HTML EntityHow to check color contrast for WCAG accessibility
Check the contrast ratio between a text and background colour against WCAG AA and AAA.
Contrast CheckerWhat does chmod 755 mean?
Understand chmod octal permissions like 755 and 644, and build them with a visual calculator.
chmod CalculatorHow to generate Lorem Ipsum placeholder text
Generate Lorem Ipsum filler text by paragraphs, sentences, or words — as plain text, HTML, or Markdown.
Lorem IpsumHow to test a regular expression
Test and debug regular expressions against sample text in your browser, with live match highlighting.
Regex Tester