SmartPlusLab
Tools
Online tools with clear inputs, predictable outputs, and honest privacy and limit notes.
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RSA Key Generator
Generate standard RSA public and private key pairs as PEM text with key sizes of 2048, 3072, or 4096 bits.
Crypto & Security -
Savings Calculator
Calculate compound interest growth over time with optional initial deposits and recurring monthly contributions.
Finance -
JSON Schema Generator
Generate draft-07 JSON Schema definitions from sample JSON data with automatic type and format inference.
Generators -
Scientific Calculator
Evaluate math expressions online with support for arithmetic operators, scientific functions, trigonometry, logarithms, roots, and standard constants.
Math & Numbers -
Sitemap Generator
Generate XML sitemaps for search engine indexing from page lists, relative paths, and custom base URLs.
SEO & Web -
URL Slug Generator
Convert text and titles into clean, URL-friendly slugs with customizable separators and case formatting.
Text Tools -
Speed Converter
Convert velocity and speed values across metric, imperial, nautical, and scientific units including km/h, mph, m/s, knots, Mach, and speed of light.
Converters -
Typing Speed Test
Calculate typing speed, character accuracy, and adjusted words per minute from your typed sample and elapsed time.
Text Tools -
SQL Formatter
Format and beautify SQL queries online with custom indentation and uppercase keywords.
Developer Tools -
SQL to CSV Converter
Convert SQL INSERT statements with VALUES clauses into structured CSV rows and view the parsed row count.
File Converters -
SSL Checker
Inspect TLS and SSL certificate details, validity dates, subject alternative names, and cipher parameters for any hostname and port.
Network Tools -
Statistics Calculator
Compute mean, median, mode, standard deviation, variance, range, and quartiles from comma-separated numbers.
Math & Numbers -
String Analyzer
Analyze text metrics, character and word counts, readability scores, and estimated reading times online.
Text Tools -
Sunrise & Sunset Calculator
Calculate estimated sunrise, sunset, solar noon, and day length in UTC for any geographic coordinate pair and date.
Time & Date -
SVG Optimizer
Optimize SVG markup online by removing comments, stripping metadata, and adjusting numeric coordinate precision.
Image Tools -
SVG to PNG Converter
Convert raw SVG vector markup into raster PNG images with optional custom width and height dimensions.
File Converters -
Tax Calculator
Estimate progressive income tax liability, effective tax rate, and take-home pay for single and married filing statuses.
Finance -
Temperature Converter
Convert temperatures among Celsius, Fahrenheit, Kelvin, Rankine, and Reaumur scales with instant precision.
Converters -
Text Cleaner
Clean and format text online by removing extra spaces, normalizing punctuation, stripping HTML tags, and removing duplicate words.
Text Tools -
Text Diff
Compare two texts line by line to identify added, removed, and unchanged lines with counts.
Text Tools -
Email Extractor
Extract email addresses from unformatted text, remove duplicates, and review total match counts.
Text Tools -
Extract Numbers
Extract numbers, decimals, and negative values from text with duplicate filtering and summary statistics.
Text Tools -
Extract URLs
Extract HTTP and HTTPS links from raw text, emails, and documents with optional duplicate filtering.
Text Tools -
File Statistics
Calculate line counts, word count, character count, UTF-8 byte size, and average line length for any pasted text.
File Tools -
Text Find & Replace
Apply multiple find and replace rules sequentially to plain text with optional case sensitivity and regular-expression matching.
Text Tools -
Lorem Ipsum Generator
Generate classic Lorem Ipsum placeholder text in paragraphs, sentences, or words for your design and typesetting layouts.
Text Tools -
Add Line Numbers
Prefix each line of text with sequential line numbers
Text Tools -
Text Padding
Pad lines of text to a fixed character width using custom characters and alignment options.
Text Tools -
Remove Duplicate Lines
Remove duplicate lines from text, keeping unique entries with options for case sensitivity, whitespace trimming, and sorting.
Text Tools -
Remove Extra Spaces
Clean up extra whitespace, trim line edges, collapse multiple spaces, and remove blank lines from your text.
Text Tools