Explore free online developer tools on SmartUtility AI. Fast, secure, privacy-preserving tools with zero installation.
Beautify, indent, format, and minify messy JSON strings with syntax error detection.
Use Tool →Validate JSON syntax against RFC 8259 standards with line and column error indicators.
Use Tool →Encode plain text or uploaded files into standard Base64 and Data URI strings.
Use Tool →Decode Base64 encoded strings back into readable UTF-8 plain text or downloadable files.
Use Tool →Percent-encode query parameters, special characters, and URI strings for safe web requests.
Use Tool →Decode percent-encoded (%20, %26) URLs into human-readable web addresses.
Use Tool →Generate cryptographically secure Version 4 (v4) UUIDs and GUIDs in bulk.
Use Tool →Calculate cryptographic hashes including SHA-256, SHA-512, SHA-1, and MD5 for text and files.
Use Tool →Test and debug regular expressions with live match highlighting, flags, and group captures.
Use Tool →Convert Unix epoch timestamps (seconds & milliseconds) to human-readable dates and vice versa.
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