Convert between Wei, Gwei, Ether, and all intermediate units instantly.

Convert any EVM address to its proper checksummed format.

Select colors and get HEX, RGB, and HSL values.

Verify WCAG accessibility contrast ratios.

Convert text to Base64 and decode Base64 back to text.

Translate cron schedules into human-readable descriptions.

Compare two texts and highlight the differences line by line.

Encode special characters to HTML entities and decode them back.

Validate, format, and beautify your JSON code.

Decode and inspect JSON Web Tokens to view header, payload, and claims.

Write Markdown and see a live HTML preview side by side.

Test and debug regular expressions with real-time match highlighting.

Encode text to URL-safe format and decode percent-encoded strings.

Find mean, median, and mode for your datasets.

Calculate your Body Mass Index with metric or imperial units and see your health category.

Calculate percentages, increases, and differences instantly.

Decode 3-digit and 4-digit SMD resistor codes instantly.

Calculate tips, split bills, and find per-person shares instantly.

Convert length, weight, temperature, and more.

Generate secure, random passwords with custom length.

Create QR codes for URLs, text, or contact info.

Create click-to-chat links without saving contacts.

Strip all numeric characters from text.

Strip symbols, punctuation, and special characters from text.

Sort lines A–Z or Z–A with deduplication options.

Convert between camelCase, snake_case, PascalCase and more.

Count words, characters, sentences, paragraphs, and reading time.