Developer Utilities
Format, validate, parse, and debug JSON, YAML, base64 data, hash algorithms, cron expressions, and ASCII converters offline-first.
Available Utilities
Password Generator
Generate secure, random, and custom passwords to protect your online accounts.
JSON Toolkit
Format, minify, and validate JSON data instantly with inline syntax highlighting and error details.
UUID Generator
Generate cryptographically secure UUID v4 (random) and UUID v1 (time-based) in bulk.
Base64 Encode/Decode
Encode and decode text strings or upload files to convert them to Base64 Data URLs locally.
Hash Generator
Calculate MD5, SHA-1, SHA-256, and SHA-512 cryptographic checksums for text or files locally.
Text Case Converter
Convert text case formats between UPPERCASE, lowercase, Title Case, camelCase, snake_case, and kebab-case.
URL Encode/Decode
Encode or decode URL strings and parameters to safely transmit them over the internet.
YAML Formatter & Validator
Format, validate, and convert YAML data to JSON (and vice-versa) instantly.
XML Formatter & Validator
Prettify, validate, and minify XML documents with real-time parser diagnostics.
SQL Formatter
Format your SQL queries across various dialects like PostgreSQL, MySQL, SQLite, and Oracle.
JWT Decoder
Decode JSON Web Tokens (JWT) client-side to inspect headers, payloads, and signatures.
HTML Entities Encoder & Decoder
Encode characters into HTML entities or decode HTML entities back to raw text with multiple format options.
Cron Descriptor & Generator
Parse complex crontab schedule expressions into plain English descriptions.
JSON Schema Generator
Generate a draft-07 JSON Schema structure automatically from a raw JSON input.
Regex Tester & Matcher
Test and match regular expressions in real-time with group extraction and replace helpers.
URL Parser & Query Splitter
Parse protocols, hosts, pathnames, and search parameters from any query URL.
Unix Epoch Timestamp Converter
Convert Unix seconds or milliseconds to human-readable date strings and vice versa.
JSON ↔ YAML Converter
Convert JSON strings to clean YAML configuration structures and vice versa.
User Agent Parser
Parse User Agent strings to identify client browsers, operating systems, and device types.
Hex ↔ String Codec
Encode text strings into hexadecimal format or decode hexadecimal representations back to plain text.
Meta Tag Generator
Generate optimized meta tags for Google search, Facebook OpenGraph, and Twitter Cards.
Robots.txt Generator
Generate customized robots.txt files to manage search engine crawl instructions.
Sitemap Generator
Generate search console XML sitemaps to index pages index lists.
Schema Markup Generator
Create Article, FAQ, and Breadcrumb structured schemas in JSON-LD formats.
Keyword Density Checker
Check keyword usage percentages and test readability levels of copy drafts.
UTM Campaign Builder
Append Google Analytics UTM campaign source and medium tags to marketing links.
AES Encryption & Decryption
Encrypt and decrypt plaintext strings using 256-bit AES-GCM and PBKDF2 locally.
RSA & ECDSA Key Generator
Generate asymmetric public and private keys in PEM format files.
NanoID & ULID Generator
Generate standard NanoID keys, ULID timestamps, and API tokens.
HMAC & CRC-32 Generator
Generate HMAC authentication signatures and CRC-32 checksums.
Base32, Base58 & Base85 Codecs
Encode text strings into Base32, Bitcoin Base58, or Ascii85 formats.
Classical Substitution Ciphers
Encode or decode strings using ROT13, Caesar, and Vigenere ciphers.
Password Entropy Checker
Calculate password bit-entropy and verify characters strength parameters.
Hash Comparator
Verify if two MD5/SHA256 signature hashes match side-by-side.