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Search, calculate, convert and generate — text tools, converters, calculators and generators that run entirely in your browser. Nothing you type is ever uploaded.
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Twenty tools across four categories. Filter by category or search by name — results update instantly.
Word Counter
Count words, characters, sentences and reading time instantly.
Text & WritingCase Converter
Switch text between upper, lower, title, camel and more.
Text & WritingText Diff Checker
Compare two blocks of text and see what changed.
Text & WritingLorem Ipsum Generator
Generate placeholder paragraphs, sentences or words.
Text & WritingFind & Replace
Search and replace text, with optional regex support.
Text & WritingText to Slug
Turn any string into a clean, URL-friendly slug.
Text & WritingUnit Converter
Convert length, weight, volume, area, speed and temperature.
ConvertersBase64 Encoder / Decoder
Encode text to Base64 or decode it back.
ConvertersColor Converter
Convert between HEX, RGB and HSL color formats.
ConvertersJSON Formatter
Validate, beautify or minify JSON in your browser.
ConvertersCSV to JSON
Turn CSV or TSV data into clean JSON records.
ConvertersNumber Base Converter
Convert numbers between binary, octal, decimal and hex.
ConvertersAge Calculator
Find exact age in years, months and days from a birth date.
CalculatorsBMI Calculator
Estimate body mass index from height and weight.
CalculatorsPercentage Calculator
Solve percentage, share and percentage-change problems.
CalculatorsLoan / EMI Calculator
Work out monthly loan payments and total interest.
CalculatorsDate Difference Calculator
Find the exact time between two dates.
CalculatorsPassword Generator
Create strong, random passwords with custom rules.
GeneratorsQR Code Generator
Turn any text or link into a downloadable QR code.
GeneratorsRandom Data Generator
Generate sample names, emails, addresses and IDs.
GeneratorsBuilt to run entirely in your browser
Every tool on Toolbox uses plain JavaScript with no server round-trip. Your text, numbers and files stay on your device — we simply don't have a way to see them.
No sign-up, no limits
Open a tool and start using it. There's no account, no paywall and no daily cap on how many times you can convert, calculate or generate.