Kaya toolbox
A browsable collection of browser-native utilities for developers, chains, files, finance, and everyday work. Most tools run locally. No accounts, no detours.
All tools
152 tools shown
EVM Address Checker
Check validity
EVM Checksum Converter
Convert formats
Token Decimals Converter
Convert formats
Wei Eth Converter
Convert formats
Gas Fee Calculator
Calculate a result
Transaction Decoder
Decode into fields
Calldata Decoder
Decode into fields
Event Log Decoder
Decode into fields
Abi Encode Tool
Open and use instantly
Abi Decode Tool
Open and use instantly
Keccak256 Hash Generator
Generate a value
Signature Verifier
Open and use instantly
Recover Address From Signature
Open and use instantly
Nonce Checker
Check validity
Contract Bytecode Analyzer
Inspect key signals
BTC Address Generator
Generate a value
BTC Address Validator
Validate input
Batch BTC Address Generator
Generate a value
BTC Transaction Decoder
Decode into fields
BTC Raw Transaction Parser
Parse structured data
BTC Fee Calculator
Calculate a result
BTC Fee Estimator
Estimate an outcome
BTC Satoshi Converter
Convert formats
BTC Script Decoder
Decode into fields
BTC Transaction Size Calculator
Calculate a result
BTC Change Output Calculator
Calculate a result
BTC Dust Limit Calculator
Calculate a result
BTC Locktime Calculator
Calculate a result
BTC Weight Calculator
Calculate a result
PSBT Builder
Build a payload
PSBT Decoder
Decode into fields
PSBT Analyzer
Inspect key signals
Ordinal Inscription Builder
Build a payload
Ordinal Fee Estimator
Estimate an outcome
Ordinal Size Calculator
Calculate a result
Transaction Analyzer
Inspect key signals
Multi Chain Tx Viewer
Inspect data
Price Impact Calculator
Calculate a result
Slippage Calculator
Calculate a result
Arbitrage Profit Calculator
Calculate a result
Oracle Delay Analyzer
Inspect key signals
Gas Optimization Analyzer
Inspect key signals
Liquidation Risk Calculator
Calculate a result
Prompt Formatter
Clean and format
Prompt Template Generator
Generate a value
Text To Markdown
Open and use instantly
Markdown Preview
Open and use instantly
JSON To Prompt
Open and use instantly
Code Explainer Lite
Open and use instantly
Text Summarizer Lite
Open and use instantly
Keyword Extractor
Open and use instantly
AI Token Estimator
Estimate an outcome
Chat Format Converter
Convert formats
Timestamp Converter
Convert formats
Current Timestamp
Open and use instantly
Timestamp Milliseconds Converter
Convert formats
Date Difference Calculator
Calculate a result
Time Difference Calculator
Calculate a result
Add Time To Date
Open and use instantly
Subtract Time From Date
Open and use instantly
Business Days Calculator
Calculate a result
Working Days Exclude Weekends
Open and use instantly
Age Calculator Exact
Calculate a result
Countdown Timer Date
Open and use instantly
Timezone Converter
Convert formats
Timezone Difference Calculator
Calculate a result
Date To Week Number
Open and use instantly
Day Of Year Calculator
Calculate a result
Leap Year Checker
Check validity
Date Format Converter
Convert formats
Date String Parser
Parse structured data
Time Duration Calculator
Calculate a result
Paste
Create a temporary link
JSON Formatter
Clean and format
JSON Minifier
Compress input
JSON Validator
Validate input
JSON Escape Unescape
Open and use instantly
JSON To Csv Converter
Convert formats
Csv To JSON Converter
Convert formats
XML To JSON Converter
Convert formats
YAML To JSON Converter
Convert formats
JSON Diff Viewer
Inspect data
JSON Flatten Tool
Open and use instantly
Base64 Encode Decode
Open and use instantly
URL Encode Decode
Open and use instantly
JWT Decoder
Decode into fields
Hash Generator MD5 SHA256
Generate a value
Hex To String Converter
Convert formats
String To Hex Converter
Convert formats
Binary To Text
Open and use instantly
Text To Binary
Open and use instantly
Unicode Converter
Convert formats
Text Diff Checker
Check validity
Word Character Counter
Open and use instantly
Text Case Converter
Convert formats
Slug Generator
Generate a value
Duplicate Line Remover
Open and use instantly
Line Sorter
Open and use instantly
Regex Tester
Run a quick test
Regex Replace Tool
Open and use instantly
Random String Generator
Generate a value
Uuid Generator
Generate a value
Compound Interest Calculator
Calculate a result
Simple Interest Calculator
Calculate a result
Loan Payment Calculator
Calculate a result
Mortgage Calculator
Calculate a result
ROI Calculator
Calculate a result
Dca Investment Calculator
Calculate a result
Stock Average Price Calculator
Calculate a result
Profit Loss Calculator
Calculate a result
Percentage Calculator
Calculate a result
Discount Calculator
Calculate a result
Tax Calculator
Calculate a result
VAT Calculator
Calculate a result
Currency Converter
Convert formats
Exchange Rate History Viewer
Inspect data
Inflation Calculator
Calculate a result
Savings Growth Calculator
Calculate a result
Net Profit Margin Calculator
Calculate a result
Break Even Calculator
Calculate a result
RMB Uppercase Converter
Convert formats
Typing Speed Test
Open and use instantly
Click Speed Test
Open and use instantly
Reaction Time Test
Open and use instantly
BMI Calculator
Calculate a result
Number Guessing Game
Play in browser
Coin Flip Simulator
Open and use instantly
Dice Roll Simulator
Open and use instantly
Memory Game
Play in browser
2048 Game
Play in browser
Sudoku Generator
Generate a value
Random Decision Maker
Open and use instantly
Random Number Generator
Generate a value
Random Password Generator
Generate a value
Random Color Generator
Generate a value
Random Gradient Generator
Generate a value
Spin Wheel Picker
Open and use instantly
Image Resize Tool
Open and use instantly
Image Compress Tool
Open and use instantly
Image Crop Tool
Open and use instantly
Image Format Converter
Convert formats
JPG To PNG
Open and use instantly
PNG To JPG
Open and use instantly
Image To Base64
Open and use instantly
Base64 To Image
Open and use instantly
PDF To Image
Open and use instantly
Image To PDF
Open and use instantly
PDF Merge Tool
Open and use instantly
PDF Split Tool
Open and use instantly
PDF Compress Tool
Open and use instantly
File Size Converter
Convert formats
Unit Converter Bytes
Convert formats