developer tools

• Base64 Encoder / Decoder

  Encode text to Base64 or decode Base64 back to text, entirely in your browser. Nothing is uploaded.

• Cron Expression Explainer

  Break a 5-field cron expression down into plain English, field by field, in your browser.

• CSS Formatter

  Reformat minified or messy CSS with consistent indentation, in your browser.

• CSV Formatter & Validator

  Clean up CSV whitespace and quoting, and flag rows with the wrong number of columns.

• HTML Entity Encoder / Decoder

  Escape text for safe embedding in HTML, or decode entities back to plain text. Runs locally in your browser.

• HTML Formatter

  Reformat minified or messy HTML with consistent indentation, in your browser.

• IP Subnet Calculator

  Calculate network address, broadcast address, and usable host range from CIDR notation.

• JSON Formatter & Validator

  Format, validate and minify JSON in your browser. Files are processed locally and never uploaded.

• JSON to TypeScript Interface

  Generate TypeScript interfaces from a sample JSON object, entirely in your browser.

• Meta Tag Generator

  Generate title, description, Open Graph and Twitter Card meta tags, in your browser.

• Regex Tester

  Test a JavaScript regular expression against text and see every match highlighted, in your browser.

• Unicode Codepoint Inspector

  Break text down into its Unicode codepoints and UTF-8 byte representation, in your browser.

• URL Encoder / Decoder

  Percent-encode text for safe use in a URL, or decode it back. Runs in your browser; nothing is uploaded.