Developer Tools

JSON Formatter & Validator →

Paste JSON to pretty-print, minify, and validate it instantly, with clear error messages if it's broken.

Encode text to Base64 or decode a Base64 string back to plain text, instantly.

Encode special characters for a URL, or decode a percent-encoded URL back to readable text.

Count words, characters, sentences, and paragraphs in any text, with reading time estimated live.

Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, and more.

Generate placeholder text by words, sentences, or paragraphs for mockups and layouts.

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes of any text, instantly and entirely in your browser.

Test a regular expression against sample text and see matches, groups, and flags highlighted live.

Compare two blocks of text and see exactly what was added, removed, or changed, line by line.

Generate random version 4 UUIDs, one at a time or in bulk, ready to copy or download.

Convert Unix timestamps to human-readable dates and back, in any timezone.

Convert colors between HEX, RGB, HSL, and HSV, with a live preview swatch.

Paste or upload CSV data and convert it to JSON — or paste JSON and convert it back to CSV.

Write or paste Markdown and see the rendered HTML preview update live, side by side.