Every little tool,
one tidy box
Counters, converters, formatters and calculators for everyday tasks. Free and private. Everything runs right in your browser.
Text Tools
Word Counter
Count words, characters, sentences and reading time as you type.
Open tool โCase Converter
Convert text to UPPER, lower, Title, Sentence, camelCase and more.
Open tool โText Compare
Spot the differences between two blocks of text, line by line.
Open tool โLorem Ipsum
Generate placeholder paragraphs, sentences or words on demand.
Open tool โDeveloper
JSON Formatter
Beautify, minify and validate JSON with clear error messages.
Open tool โBase64 Encode/Decode
Encode text to Base64 or decode it back, instantly.
Open tool โURL Encoder
Percent-encode or decode text for safe use in URLs.
Open tool โHash Generator
Create SHA-256, SHA-1 and SHA-512 hashes of any text.
Open tool โQR Code Generator
Turn any link or text into a downloadable QR code.
Open tool โCalculators
Password Generator
Generate strong, random passwords with custom rules.
Open tool โPercentage Calculator
Work out percentages, increases, decreases and differences.
Open tool โLoan / EMI Calculator
Estimate monthly payments, total interest and payoff for any loan.
Open tool โUnit Converter
Convert length, weight and temperature between common units.
Open tool โFAQ
Is ToolOtter free?
Yes, every tool is 100% free with no sign-up or limits. Ads keep it running.
Is my data private?
Completely. Every tool runs locally in your browser. Nothing you type or paste is ever sent to a server.
Do the tools work offline?
Once a page has loaded, most tools keep working even without a connection.