Developer Tools
Format and validate JSON with exact syntax error locations, minify code, and inspect data structures.
11 tools and calculators
JSON Formatter & Validator
Format, prettify, minify, and validate JSON data instantly. Identifies exact line and column locations for syntax errors with keyboard shortcuts and zero telemetry.
Word Counter & Character Statistics
Count words, characters (with and without spaces), sentences, paragraphs, and estimated reading time live as you type. Includes keyword density and case converters.
Base64 Encoder & Decoder (Unicode UTF-8 Safe)
Encode text to Base64 and decode Base64 strings to readable text. Full UTF-8 and emoji support with instant 1-click copy and file download.
URL Encoder & Decoder with Query Parser
Encode and decode URI strings and query components. Automatic parameter parser, UTF-8 safety, and 1-click swap.
Cryptographically Secure UUID v4 Generator
Generate cryptographically random UUID v4 strings in bulk. Uppercase, lowercase, and hyphen-free formats with 1-click copy and text download.
Unix Timestamp Converter & Epoch Date Formatter
Convert Unix epoch timestamps (seconds and milliseconds) to human dates, UTC, ISO 8601, and local time. Live epoch clock with bidirectional converter.
Free QR Code Generator (URLs, WiFi, vCard — No Expiry)
Generate clean, customizable QR codes for websites, WiFi credentials, vCard contacts, and email drafts. Vector SVG and high-resolution PNG export with zero tracking.
Cryptographic Hash & Checksum Generator (SHA-256, MD5, HMAC)
Compute SHA-256, SHA-512, SHA-384, SHA-1, MD5, and HMAC-SHA256 hashes instantly in your browser. Supports both text strings and direct file checksum verification.
JWT Decoder & Token Inspector (100% Private Client-Side)
Decode and inspect JSON Web Tokens (JWT) in real time. Color-coded Header, Payload, and Signature breakdown with token expiration countdown and human dates.
Case Converter & Text Transformation Tool
Convert text between 12+ naming conventions: Title Case, UPPERCASE, lowercase, camelCase, snake_case, kebab-case, PascalCase, and CONSTANT_CASE with live statistics.
Text Diff Checker & Code Comparison Tool
Compare two text documents or code snippets to highlight additions, deletions, and modifications. Side-by-side split view, unified inline diff, and change statistics.