All tools
27 free tools that run entirely in your browser. Search by name or filter by category.
27 tools
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text.
Open tool →Break-Even Calculator
Find how many units you must sell to cover your costs.
Open tool →Case Converter
Convert text between upper, lower, title, and more.
Open tool →Character Counter
Count characters with live limits for social and meta.
Open tool →Cron Expression Generator
Build cron schedules and read them in plain English.
Open tool →CSV to JSON Converter
Convert CSV data into a clean JSON array of objects.
Open tool →JSON Formatter
Beautify and minify JSON with adjustable indentation.
Open tool →JSON Validator
Check whether JSON is valid and see the exact error.
Open tool →JWT Decoder
Decode a JWT's header and payload without a server.
Open tool →Markup Calculator
Find the selling price and markup percentage from cost.
Open tool →Meta Description Generator
Write meta descriptions with live length feedback.
Open tool →Meta Title Generator
Craft meta titles with a live pixel and length check.
Open tool →Password Generator
Create strong, random passwords with custom rules.
Open tool →Percentage Calculator
Solve percentages: X% of Y, what percent, and percent change.
Open tool →Profit Margin Calculator
Calculate gross profit and profit margin from cost and revenue.
Open tool →Regex Tester
Test regular expressions against text with live matches.
Open tool →Remove Duplicate Lines
Delete duplicate lines and optionally sort the result.
Open tool →Robots.txt Generator
Generate a valid robots.txt with common rules.
Open tool →ROI Calculator
Calculate return on investment as a percentage and net gain.
Open tool →Schema Markup Generator
Generate JSON-LD structured data for common types.
Open tool →Slug Generator
Turn titles into clean, SEO-friendly URL slugs.
Open tool →Sort Lines
Sort lines alphabetically, numerically, or reversed.
Open tool →Text Diff Checker
Compare two texts and highlight the differences.
Open tool →Unix Timestamp Converter
Convert between Unix timestamps and human dates.
Open tool →URL Encoder / Decoder
Percent-encode or decode URLs and query parameters.
Open tool →UUID Generator
Generate random version 4 UUIDs individually or in bulk.
Open tool →Word Counter
Count words, characters, sentences, and reading time.
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