JSON formatter & validator
Format, beautify, validate, and minify JSON online. Pinpoint syntax errors by line and column, sort keys, and copy or download the result.
Pick a color and convert between HEX, RGB, HSL, HSV, and CMYK. See tints, shades, and contrast ratios against black and white.
Tints (lighter)
Shades (darker)
Pick any color and get its value in HEX, RGB, HSL, HSV, and CMYK. Type into any field to convert between formats, or use the eyedropper (in supported browsers) to sample a color from your screen.
Color picker & converter is a free online tool on ReallyUseful.Tools. No account is required.
Color picker & converter is designed to run in your browser where supported, so files can stay on your device instead of being uploaded to a server.
Format, beautify, validate, and minify JSON online. Pinpoint syntax errors by line and column, sort keys, and copy or download the result.
Encode text to Base64 or decode Base64 back to text with full UTF-8 support and an optional URL-safe alphabet.
Convert Unix epoch timestamps to human-readable dates and back. Supports seconds and milliseconds, local time, UTC, and ISO 8601.
Generate MD5, SHA-1, SHA-256, SHA-512, SHA3, and CRC32 hashes for text or files. Verify checksums and create HMACs locally.
Test JavaScript regular expressions with live match highlighting, capture groups, flags, and replace preview.