Fast, free, no-nonsense online tools
A growing library of fast, free, privacy-friendly online tools. Converters, calculators, formatters, validators and generators that just work.
503 free tools and counting
Popular tools
JSON Formatter
Format, validate and minify JSON online. Pretty-print with custom indentation, sort keys and catch syntax errors. Runs in your browser.
JSON to CSV
Convert JSON to CSV online. Paste an array of objects and get clean, spreadsheet-ready CSV with the right headers. Runs in your browser.
Remove Line Breaks
Remove line breaks and paragraph breaks from text online. Flatten copied text into one line, keep spaces tidy, then copy the result. Free and private.
SIP Calculator
Calculate SIP returns online. Enter your monthly investment, expected return and duration to see the future value, total invested and gains.
Browse by category
Converters
Convert between data formats, units, colors and encodings. Fast, accurate, no upload required for client-side formats.
45 toolsText Tools
Clean, count, transform and compare text. Remove line breaks, change case, dedupe lines and more.
41 toolsDeveloper Tools
Formatters, encoders, decoders and generators for developers. JSON, JWT, Base64, hashes, UUIDs and regex.
107 toolsSecurity Tools
Practical security tooling for developers and pentesters: header and CSP analyzers, hash and CVSS tools, TOTP and HMAC generators, and helpers for authorized testing.
14 toolsSEO Tools
Practical SEO utilities: meta tag generators, schema builders, slug and robots.txt generators, SERP helpers.
39 toolsFinance Calculators
Money math made simple: loans, interest, savings, tax and retirement calculators with clear breakdowns.
68 toolsBusiness Tools
Run the numbers for your business: margins, breakeven, pricing, ROI and commission calculators.
27 toolsHR & Office
Workplace utilities: timesheet and overtime calculators, letter and document generators for HR teams.
27 toolsDocuments & Legal
Generate invoices, quotations, NDAs and contracts with clean, professional, ready-to-send formatting.
30 toolsAI Utilities
AI-assisted writing and prompt tools: rewriters, prompt builders and formatters for everyday work.
0 toolsEcommerce Tools
Seller math: marketplace fees, profit, margin and shipping calculators for Amazon, Etsy, eBay and more.
16 toolsHealth & Fitness
Evidence-based health and fitness calculators: BMI, BMR, TDEE, body fat, macros, pace and more.
28 toolsDate & Time
Work with dates and times: age, date differences, business days, durations, time zones and countdowns.
14 toolsMath
Everyday and advanced math: fractions, ratios, primes, statistics, roman numerals, equations and more.
39 toolsValidators
Validate and verify codes, numbers and identifiers: credit cards, IBAN, ISBN, barcodes, routing numbers and more, with the correct checksums.
8 tools