Programming Tools

Format, validate and beautify JSON with syntax highlighting and clear error messages.

Minify JSON by removing all unnecessary whitespace. Validates your JSON and shows size savings.

Encode text to Base64 and decode Base64 back to text, with full Unicode support.

Percent-encode text for URLs and decode URL-encoded strings, with component and full-URI modes.

Escape special characters into HTML entities and decode entities back to plain text.

Decode JSON Web Tokens to inspect the header and payload. Runs locally, tokens never leave your browser.

Test regular expressions against sample text with live match highlighting and capture groups.

Write Markdown and see the rendered HTML preview live. Copy or download the generated HTML.

Generate random version 4 UUIDs (GUIDs), one or in bulk, with uppercase and no-dash options.

Minify CSS by stripping comments and whitespace. See the size savings instantly.

Safely compress JavaScript by removing comments and extra whitespace while preserving strings.

Minify HTML by collapsing whitespace and removing comments, preserving pre and textarea content.

Format and beautify SQL queries with keyword capitalization and smart indentation.

Parse cron expressions into plain English and see the next scheduled run times.

Convert text to binary code and binary back to text, with hex and octal options.

Convert text to ASCII / Unicode code points and back. See character codes in decimal and hex.

A searchable reference of all HTTP status codes with plain-English explanations.