Data Utils
Data manipulation and analysis tools. Transform, filter, deduplicate, and generate data in CSV, JSON, and other formats — all client-side.
Duplicate Finder
Detect duplicate rows, find near-matches, and analyze data quality. Supports column selection, case-insensitive matching, and export of results.
Excel to JSON
Upload .xlsx or .xls files and instantly convert spreadsheet data to JSON format.
Mock Data
Create realistic fake JSON data for testing and development. Generate names, emails, addresses, dates, UUIDs, and more — entirely in your browser.
SQL Query Builder
Build SELECT, INSERT, UPDATE, and DELETE queries with a point-and-click interface. No SQL knowledge required.
Table Formatter
Paste tabular data and convert between CSV, TSV, Markdown, JSON, HTML table, and ASCII table formats.
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- ABI Encoder / Decoder
- Block Estimator
- Calldata Cost
- CREATE2 Address
- ENS Availability
- ENS Cost Estimator
- ENS Lookup
- ENS Namehash
- ENS Record Viewer
- ENS Subname Explorer
- ERC-20 Unit Converter
- Gas Estimator
- HD Wallet Derivation
- Merkle Tree Visualizer
- 4-Byte Selector Lookup
- Solidity Storage Layout
- Transaction Decoder
- Vanity Address Estimator
- Wallet Address Validator
- Wei/Gwei/Ether Converter
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- API Response
- ASCII Table
- Code Bug Detector
- Code Explanation
- CSS Beautifier
- Env Parser
- GraphQL Query
- Syntax Highlight
- HTML Beautifier
- JS Beautifier
- JSON Formatter
- JSONPath
- JWT Decoder
- JS keyCodes
- API Lorem Ipsum
- RegExp
- Regex Library
- Semver Compare
- SQL Beautifier
- TOML Formatter
- Code Unminifier
- XML Beautifier
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- Amortization
- Break-Even
- Compound Interest
- Crypto Profit/Loss
- Debt Payoff
- Discount
- Effective Interest
- Emergency Fund
- Inflation Calculator
- Simple Interest
- Invoice Calculator
- IRR Calculator
- Mortgage
- NPV Calculator
- Portfolio
- Profit Margin
- Rent vs Buy
- Retirement Calc
- ROI Calculator
- Salary vs Hourly
- Savings Goal
- Tax Calculator
- VAT
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- Equation Solver
- Exponent Calculator
- Factorial Calculator
- Fibonacci Sequence
- Fraction Calculator
- Fraction Simplifier
- GCD Calculator
- GCD/LCM
- Least Common Multiple (LCM) Calculator
- Logarithm Calculator
- Magic Square
- Matrix Calculator
- Number Base Converter
- Pascal's Triangle
- PDE Solver
- Prime Checker
- Prime Factorization
- Roman Numbers
- Scientific Notation
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- Broken Link Checker
- Canonical URL Checker
- Core Web Vitals Checker
- Favicon
- Heading Structure
- Keyword Density
- Meta Tags
- Mobile-Friendly Test
- Open Graph Tags
- Page Load Time Analyzer
- Redirect Checker
- robots.txt
- Schema Markup
- SEO Optimized Checklist
- XML Sitemap
- Time on Page Tracker
- Page Title & Desc.
- Twitter Card Generator
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- Acceleration
- Substance Amount
- Angle
- Area
- Astronomical
- Base Converter
- Capacitance
- Electric Charge
- Cooking
- Data Transfer
- Data Storage
- Density
- Energy Converter
- Force Converter
- Frequency Converter
- Fuel Economy
- Illuminance
- Inductance
- Length / Distance
- Power
- Pressure
- Electrical Resistance
- Time
- Speed
- Temperature
- Viscosity
- Volume
- Weight
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