Powerful tools for developers and designers — Base64, URL encode, JWT decode, hash generators, password generators, color palettes, and more.
Encode text to Base64 or decode Base64 strings back to plain text. Supports URL-safe mode.
EncoderPercent-encode special characters for safe URL use, or decode encoded URLs. Three modes.
EncoderEscape special characters to HTML entities or unescape them. Prevents XSS vulnerabilities.
EncoderDecode JSON Web Tokens and inspect header, payload claims, expiry status, and algorithm.
DecoderGenerate MD5 checksums with live hashing, uppercase option, and bulk multi-line support.
HashGenerate strong, random passwords with custom length, character sets, and bulk export.
GeneratorGenerate UUID v4 (random) or v1 (time-based) identifiers. Bulk generate up to 500 at once.
GeneratorGenerate placeholder text by paragraphs, sentences, or words. Includes HTML <p> output.
GeneratorGenerate SHA-1, SHA-256, SHA-384, SHA-512 hashes using Web Crypto API. Hash comparison included.
HashCreate complementary, analogous, triadic, and monochromatic palettes. Export as HEX, CSS, Tailwind.
DesignDevTools provides a growing collection of free, fast, and privacy-respecting tools for web developers, software engineers, and designers. Every tool runs entirely in your browser — no data is ever sent to any server.
Whether you need to encode data for an API, decode a JWT for debugging, generate secure passwords, compute cryptographic hashes, or create a color palette for your next project — we have you covered.