Free online tools for business, developers, creators, and everyday tasks
Toolify is a fast, growing collection of simple utilities that run right in your browser. No accounts, no uploads — your data never leaves your device.
Popular tools
Handy utilities people reach for every day.
Profit Margin Calculator
Calculate gross profit and profit margin from cost and revenue.
Open tool →ROI Calculator
Calculate return on investment as a percentage and net gain.
Open tool →Percentage Calculator
Solve percentages: X% of Y, what percent, and percent change.
Open tool →JSON Formatter
Beautify and minify JSON with adjustable indentation.
Open tool →UUID Generator
Generate random version 4 UUIDs individually or in bulk.
Open tool →JWT Decoder
Decode a JWT's header and payload without a server.
Open tool →Browse by category
Everything is organized so you can find the right tool fast.
Business
5 tools
Margins, markups, ROI, and everyday money math.
Developer
12 tools
Encoders, formatters, generators, and converters.
Text
7 tools
Count, transform, clean, and compare text.
SEO
5 tools
Slugs, meta tags, robots.txt, and structured data.
Productivity
2 tools
Small utilities that save you time every day.
File & Data
4 tools
Convert and transform common data formats.
26 tools
Merge, split, compress, convert, and edit PDFs.
From the guides
Plain-English explainers for the tasks our tools help with.
How to Format JSON: Beautify, Validate, and Minify
A practical guide to reading and cleaning up JSON — pretty-printing, catching syntax errors, and minifying for production.
What Is Base64 Encoding? A Plain-English Guide
What Base64 is, why it exists, where you'll run into it, and why it is not encryption — explained without the jargon.
Converting Between CSV and JSON: A Practical Guide
How CSV and JSON differ, when to use each, and how to convert cleanly in both directions without corrupting your data.
Runs in your browser
Tools work entirely client-side, so results are instant and your data stays private.
No sign-up required
Every tool is free to use immediately — no account, no paywall, no friction.
Built to grow
A clean, consistent library that keeps expanding with genuinely useful tools.