Free developer tools

Generate random UUID v4 in bulk. Useful for seeds, unique IDs and API testing.

Create strong passwords with letters, numbers and symbols. Configure length and character types.

Generate QR Codes from any text or URL. Copy or download the image directly from your browser.

Generate signed JWT tokens with HS256/HS384/HS512. Edit header, payload and secret directly in the browser.

Validate, format and minify JSON. Identifies syntax errors with line highlight.

Decode JWT header and payload. View claims, expiration and type without the secret key.

Encode and decode text in Base64. Ideal for authorization tokens and API payloads.

Encode and decode URL parameters (percent-encoding). Useful for query strings and URIs.

Test regular expressions in real time. See highlighted matches and captured groups.

Generate SHA-256, SHA-1 and SHA-512 hashes from any text. Useful for checksums and verification.

Convert cURL commands to JavaScript (fetch or axios). No install, instant result.

Convert Unix timestamps to readable dates and vice versa. Supports seconds and milliseconds.

Calculate the difference between two dates in days, hours, minutes and seconds.

Count characters, words, lines and estimated reading time of any text.

Convert text to URL-safe slug, camelCase, snake_case or PascalCase instantly.

Convert colors between HEX, RGB and HSL. Preview the color in real time as you type.