No sign-up · Nothing uploaded · 62 free tools
Free Online Tools
That Run in Your Browser
Calculators, unit converters, text, developer and image tools. Everything works on your device, so your data never leaves it.
- 🔒 Private by design
- 🆓 Free to use
- 🚫 No watermarks
- ⚡ Instant results
Popular tools
The tools people reach for most
Percentage Calculator
Work out percentages, percentage change, and what one number is as a percentage of another.
Age Calculator
Exact age in years, months and days from a date of birth on any date, plus age difference, a baby’s corrected age and test-scoring age.
Word Counter
Count words, characters, sentences, paragraphs and reading time as you type.
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case and kebab-case.
JSON Formatter
Format, indent and minify JSON, with precise error positions when it will not parse.
Password Generator
Generate strong random passwords using your browser's cryptographic random source.
QR Code Generator
Turn a URL or any text into a downloadable QR code, rendered locally with no third-party image service.
Color Converter
Convert colours between HEX, RGB, HSL and HSV, with a live preview and contrast check.
Image Compressor
Shrink JPG, PNG and WebP files with an adjustable quality setting and a live size comparison.
Browse by category
Image Tools
Convert, compress, resize and edit images right in your browser.
7 tools →
Audio Tools
Turn OGG, MP3, M4A, FLAC and other audio files into WAV in your browser.
1 tools →
Calculators
Percentage, age, BMI, loan and everyday maths calculators.
12 tools →
Unit Converters
Length, weight, temperature, volume, area, speed, time zones and more.
18 tools →
Text Tools
Word count, case conversion, slugs, diffs and text cleanup.
6 tools →
Developer Tools
JSON, Base64, hashing, URL encoding, colours and number bases.
14 tools →
Generators
Passwords, UUIDs, QR codes and lorem ipsum.
4 tools →
Frequently asked questions
Are the tools really free?
Yes. All 62 tools are free to use with no account, no card and no watermark on anything you make.
Is anything I type or open uploaded?
No. Every tool on this site runs in your browser. What you type, and any image you open, stays on your device — you can check in your browser's DevTools Network tab that nothing is sent.
Do I need to install anything?
No. The tools work in any modern browser on desktop or mobile.
Do the tools work offline?
Almost all of them. Once a tool page has loaded, the tool does its work without contacting a server, so a dropped connection will not interrupt it. The one exception is the currency converter, which needs a connection to fetch that day's exchange rates.