Tools
Free online utilities and converters to help you work more efficiently
Text to Lowercase Converter
Convert any text to lowercase instantly. Perfect for formatting text, fixing capitalization, and preparing content.
Text to Uppercase Converter
Convert any text to uppercase instantly. Transform all letters to CAPITALS for emphasis, formatting, or data processing.
Sentence Case Converter
Convert text to sentence case. Capitalizes the first letter of each sentence and converts the rest to lowercase.
Title Case Converter
Convert text to title case. Capitalizes the first letter of each word, perfect for titles and headings.
Reverse Text Generator
Reverse your text instantly. Flip text backwards for fun, coding, or creative purposes.
Word Counter
Count words, characters, sentences, and paragraphs instantly. Get detailed text statistics for your content.
Base64 Encoder/Decoder
Encode and decode Base64 strings instantly. Convert text to Base64 and vice versa for API development and data transmission.
JSON Formatter & Beautifier
Format and beautify JSON instantly. Validate, minify, and prettify JSON data with proper indentation.
URL Encoder & Decoder
Encode and decode URL parameters online. Convert special characters for safe transmission and decode encoded URLs instantly.
JWT Decoder
Decode and inspect JWT tokens online. View JWT header, payload, and signature to understand your JSON Web Tokens.
Strong Password Generator
Generate strong, secure passwords instantly. Customize length, include numbers, symbols, and uppercase letters.
UUID Generator
Generate UUIDs (Universally Unique Identifiers) instantly. Create v4 UUIDs for your applications and databases.
Ethereum Unit Converter
Convert between Ethereum units instantly. Convert Wei, Gwei, Ether, and all Ethereum denominations with precision.
Blockchain Address Validator
Validate blockchain addresses instantly. Check if Ethereum, Bitcoin, and other cryptocurrency addresses are valid.
Transaction Decoder
Decode raw blockchain transactions to human-readable format. Analyze transaction data, gas, and parameters.
ABI Encoder/Decoder
Encode and decode function calls using contract ABIs. Convert between human-readable parameters and encoded data.
Keccak-256 Hasher
Hash strings using Keccak-256 algorithm. The same hashing function used by Ethereum for addresses and data.
Signature Verifier
Verify ECDSA signatures for Ethereum messages. Check if a signature was created by a specific address.
Gas Estimator
Estimate gas costs for blockchain transactions. Calculate transaction fees across different networks.
Address Converter
Convert addresses between different blockchain formats. Validate and transform addresses across networks.
Bytecode Analyzer
Analyze smart contract bytecode. Extract information, opcodes, and metadata from compiled contract bytecode.
Merkle Tree Generator
Generate Merkle trees and proofs for airdrops, whitelists, and verification. Create cryptographic proofs for data sets.
Mnemonic Validator
Validate BIP39 seed phrases. Check if your mnemonic phrase is valid and properly formatted.
Checksum Validator
Validate and convert Ethereum addresses to EIP-55 checksum format. Verify address checksums for security.
Address Checker
Validate multiple blockchain addresses at once. Upload CSV files or paste addresses to check for valid and invalid addresses.
Ethereum Signature Dictionary
Search and browse Ethereum function signatures. Decode function selectors and find function names from 4-byte signatures.
Function/Error to Signature Converter
Convert Solidity function or error signatures to 4-byte selectors. Generate function selectors from function names.
Ethereum Event Signatures
Search and browse Ethereum event signatures. Decode event topics and find event names from 32-byte signatures.
Epoch & Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds, milliseconds, microseconds, and nanoseconds.
Cron Expression Generator & Validator
Create and validate cron expressions instantly. Understand cron syntax, see next execution times, and get human-readable descriptions.
QR Code Generator
Generate QR codes instantly. Create QR codes for URLs, text, or any data you want to share.
Image Resizer & Compressor
Resize and compress images instantly. Adjust dimensions, quality, and format without leaving your browser.
Color Converter
Convert colors between HEX, RGB, HSL, and HSV formats. Pick colors and get instant conversions.
CSV to JSON Converter
Convert CSV data to JSON format instantly. Perfect for data processing, API development, and data migration.
Hash Generator
Generate cryptographic hashes instantly. Support for SHA-1, SHA-256, SHA-384, and SHA-512 algorithms.