Tools
Free online utilities and converters to help you work more efficiently
Case Converter - Convert Case Online
Free online case converter. Convert text to uppercase, lowercase, title case, sentence case & more. Text case changer tool.
Text to Lowercase Converter
Convert any text to lowercase instantly. Perfect for formatting text, fixing capitalization, and preparing content.
Uppercase Converter - Convert to Uppercase
Convert to uppercase instantly. Free uppercase converter - to uppercase, uppercase convert, convert uppercase online.
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.
Upside Down Text Generator
Flip your text upside down! Create fun flipped text for social media instantly.
Whitespace Remover
Remove extra whitespace, line breaks, and empty lines from text. Clean up messy text instantly.
Duplicate Line Remover
Remove duplicate lines from text instantly. Clean up lists, data, and text with one click.
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 - JWT デコード
Decode and inspect JWT tokens online. View JWT header, payload, and signature. JWT デコード - JSON Web Token decoder.
Binary Code Translator
Convert text to binary code and binary to text. Free binary translator - encode and decode binary instantly.
Morse Code Translator
Convert text to Morse code and Morse code to text. Free Morse translator - encode and decode messages instantly.
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 v1 or v4 UUIDs in multiple formats for your applications and databases.
Random Number Generator
Generate random numbers within any range. Free random number picker for lotteries, games, and decisions.
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 ETH
Estimate gas costs for Ethereum transactions. Gas estimator ETH - calculate transaction fees and gas prices.
Gas to ETH Calculator
Convert gas price in wei or gwei to ETH and USD. Live gas presets plus custom gas limits.
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.
Wallet Address Checker
Check wallet address validity. Bulk validate blockchain addresses - verify ETH, Bitcoin, and crypto wallet addresses online.
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.
ETH Gas Tracker
Track Ethereum gas prices in real-time. Check ETH gas now, monitor fees, and estimate transaction costs.
Blockchain Type Converter
Convert between Solidity types instantly. Convert uint256 to bytes32, address to bytes, and all blockchain data types with precision.
Bitcoin Address Validator
Validate Bitcoin addresses instantly. Check P2PKH, P2SH, Bech32, and Taproot address formats. Verify BTC addresses before sending transactions.
Merge PDF
Combine PDFs in the order you want with the easiest PDF merger available. Merge multiple PDF files into one document instantly.
Split PDF
Separate one page or a whole set for easy conversion into independent PDF files. Split PDF documents instantly.
Compress PDF
Reduce file size while optimizing for maximal PDF quality. Compress PDF files instantly without losing quality.
Rotate PDF
Rotate your PDFs the way you need them. You can even rotate multiple PDFs at once! Rotate PDF pages instantly.
PDF to JPG
Convert each PDF page into a JPG or extract all images contained in a PDF. Convert PDF to images instantly.
JPG to PDF
Convert JPG images to PDF in seconds. Easily adjust orientation and margins. Convert multiple images to a single PDF document.
PDF to PNG
Convert each PDF page into a PNG or extract all images contained in a PDF. Convert PDF to PNG images instantly.
PNG to PDF
Convert PNG images to PDF in seconds. Easily adjust orientation and margins. Convert multiple PNG images to a single PDF document.
Images to PDF
Convert multiple images to a single PDF document instantly. Support for JPG, PNG, WebP, and more image formats.
Image Converter
Convert images between PNG, JPG, and WebP formats instantly. Convert PNG to JPG, JPG to PNG, WebP to PNG, and more.
HEIC to JPG
Convert HEIC images to JPG instantly. Convert HEIC/HEIF photos from iPhone to JPG format.
Bitcoin Gifts
Discover Hong₿ao - the perfect way to gift Bitcoin. Create personalized Bitcoin paper wallets with AI art, no KYC required. Turn Bitcoin gifting into a shared journey.
Epoch & Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds, milliseconds, microseconds, and nanoseconds.
Cron Expression Generator & Parser
Create and parse cron expressions. Free cronexpression generator - validate cron syntax and see next execution times.
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.