SmartPlusLab
Tools
Online tools with clear inputs, predictable outputs, and honest privacy and limit notes.
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CSS Unit Converter
Convert CSS units between pixels, em, rem, percent, points, viewport units, and physical dimensions with custom base font and screen sizes.
Developer Tools -
CSS Variables Parser
Analyze CSS custom properties, inspect variable values, count references, and identify unused definitions.
Developer Tools -
CSV Formatter
Format and structure CSV text with custom delimiters, quote characters, and field quoting options.
File Tools -
CSV to JSON Converter
Convert CSV text to JSON format with custom delimiters, header detection, and adjustable indentation.
File Converters -
CSV to Table Converter
Convert CSV data into HTML tables with optional header formatting and custom CSS classes.
File Converters -
Currency Converter
Convert amounts between major currencies using official European Central Bank reference exchange rates.
Converters -
Data Storage Converter
Convert data storage values between bits, bytes, decimal units like megabytes and gigabytes, and binary units like mebibytes and gibibytes.
Converters -
Date Add and Subtract Calculator
Add or subtract days, weeks, months, and years from any calendar date.
Time & Date -
Date Difference Calculator
Calculate the difference between two dates in days, weeks, hours, minutes, and approximate months or years.
Time & Date -
Day of Year Calculator
Calculate the ordinal day number of the year for any calendar date, including days remaining, week number, quarter, and year progress percentage.
Time & Date -
Text Diff Checker
Compare two blocks of text online to find additions, deletions, and line-by-line differences in standard unified diff format.
Developer Tools -
Discount Calculator
Calculate your discounted final price, total dollar savings, and applied markdown percentage quickly online.
Finance -
DNS Lookup
Query live DNS records including A, AAAA, CNAME, MX, NS, SOA, TXT, and CAA for any valid domain name.
Network Tools -
Duplicate Line Remover
Find, remove, extract, or highlight duplicate lines from plain text with optional case-sensitive matching.
Text Tools -
Emoji Picker
Search and browse emojis by keyword, category, or name with customizable result limits.
Text Tools -
AES Cipher
Encrypt and decrypt text with AES-256-GCM using a key derived from your password.
Crypto & Security -
Energy Converter
Convert energy values between joules, kilojoules, calories, kilocalories, watt-hours, kilowatt-hours, BTUs, electronvolts, foot-pounds, and therms.
Converters -
CSV / Excel to JSON Converter
Convert comma-separated table text into formatted JSON data with custom indentation and header mapping options.
File Converters -
Extract Audio
Extract the primary audio track from video files into MP3, AAC, M4A, OGG, or WAV formats.
Video & Audio -
Factorial Calculator
Calculate factorials (n!), permutations (nPr), and combinations (nCr) from non-negative integers.
Math & Numbers -
Fake Data Generator
Generate randomized mock user profiles and contact details for testing and form validation.
Generators -
Fibonacci Generator
Generate Fibonacci sequence numbers up to a specified term count or maximum value threshold.
Math & Numbers -
File Hash Generator
Compute cryptographic hexadecimal digests from text using algorithms like SHA-256, MD5, and SHA-512.
File Tools -
File Size Calculator
Convert file sizes between bytes, KB, MB, GB, TB, and PB using binary 1024-based scaling with automatic or custom unit output.
File Tools -
Flexbox Cheatsheet
Interactive reference for CSS Flexbox properties, default values, syntax options, and common layout patterns.
Developer Tools -
Fraction Calculator
Calculate sums, differences, products, and quotients of two fractions with automatic reduction, mixed-number output, and decimal approximations.
Math & Numbers -
Fuel Consumption Converter
Convert fuel economy ratings among US MPG, UK MPG, liters per 100 km, kilometers per liter, and miles per liter.
Converters -
GCD and LCM Calculator
Calculate the greatest common divisor and least common multiple for two or more positive integers.
Math & Numbers -
Git Commit Generator
Generate formatted Git commit messages with optional type, scope, breaking change flags, and bulleted summaries.
Developer Tools -
Gitignore Generator
Generate standard .gitignore template files for Python, Node, Java, Go, and Rust projects.
Developer Tools