Free tools for the small stuff.
Small, focused tools for everyday jobs, like counting words or fixing capital letters. No sign-up, nothing to install.
Runs entirely in your browser. Nothing you enter is uploaded or stored.
Text tools
Developer tools
Base64 Encoder and Decoder
Turn text into Base64 and back, including emoji, URL-safe values and data URLs.
OpenCron Expression Parser
Check what a cron line actually means, and when it will really run.
Opencurl to Code
Paste a curl command copied from DevTools and get working fetch, Node.js, PHP, Java, Python, Go or Ruby code.
OpenHash Generator
Get every common hash of a piece of text or a file at once, and check one against a published value.
OpenJSON Diff
Find what really changed between two API responses, without the noise of key order or indentation.
OpenJSON Formatter
Pretty-print JSON, unescape it from a log line, or find out exactly where it breaks.
OpenJSON to TypeScript & Zod
Paste a real API response and get the TypeScript interface or Zod schema that matches it.
OpenJSON Tree Viewer
Collapse what you don't need, find the field you do, and copy the path straight into your code.
OpenJWT Decoder
Read a token's claims, see whether it has expired, and check an HS256 signature without sending it anywhere.
OpenMock Data Generator
Describe your fields once and get fake rows as JSON, CSV or SQL. The same seed always gives the same data.
OpenRegex Tester
Write a pattern, watch it match your text as you type, and check the groups it captures.
OpenUnix Timestamp Converter
Turn epoch numbers into readable dates and back, with the current timestamp always on screen.
OpenURL Encoder and Decoder
Encode one piece of a URL or a whole one, decode what someone sent you, and read the query parameters.
OpenUUID Generator
Make random or time-ordered UUIDs in bulk, and inspect one to see its version and age.
Open
CSS tools
Color Contrast Checker
Check any two colors against WCAG AA and AAA, with a real text preview and a suggested fix.
OpenCSS Box Shadow Generator
Build a shadow by eye, stack layers, tweak blur and spread, then copy the CSS or a Tailwind class.
OpenCSS Formatter and Minifier
Make CSS readable, or make it small. Paste a stylesheet and get the result instantly, with the bytes saved.
OpenCSS Gradient Generator
Design a gradient with a live preview, then copy the CSS. Linear, radial or conic, with as many colours as you need.
OpenCSS Triangle Generator
Start from a tooltip arrow, caret or speech bubble, or draw any triangle. Type any colour and copy working CSS.
OpenCubic Bezier Editor
Drag the two handles, watch the motion, copy the cubic-bezier() when it feels right.
OpenHex to RGB Converter
Paste a hex code and get RGB, RGBA and HSL values ready to copy, transparency included.
OpenPX to REM Converter
Turn pixel values into rem, one at a time, from a table of common sizes, or across a whole stylesheet.
OpenREM to PX Converter
Work out what a rem value really measures, one at a time, from a table, or across a whole stylesheet.
OpenRGB to Hex Converter
Type three numbers and get the hex code, plus the short form and the alpha digits when they apply.
Open
Finance calculators
CAGR Calculator
Find the steady yearly growth rate between two values, what an investment grows to at a rate, or how long it takes to reach a target.
OpenCompound Interest Calculator
Enter a starting amount, rate and time period to see how compound interest grows it, at any compounding frequency.
OpenLoan / EMI Calculator
Enter the loan amount, rate and term to get your monthly payment and a full year-by-year breakdown.
OpenMortgage Calculator
Enter your home price, down payment and loan terms to see your true monthly payment, not just principal and interest.
OpenSIP Calculator
See what a monthly SIP grows to, how much to invest for a goal, or how long a goal takes, with a yearly raise, a lump sum to start, and what it's worth after rising prices.
OpenSWP Calculator
Plan a monthly income from your savings. See how long it lasts, how much you can safely take, and what happens if markets do worse than you hope.
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Health calculators
PDF tools
Merge PDF
Add your PDFs, put them in the order you want, and download one combined file.
OpenOrganize PDF
Move pages into a new order and remove the ones you don't want, then save the result.
OpenRotate PDF
Fix a sideways or upside-down scan, turn all the pages, or only the ones you pick.
OpenSplit PDF
Cut a PDF into parts between any pages or every few pages, or pick the pages you want, and download them.
Open
Image tools
Image Compressor
Make photos and screenshots smaller for email and the web, and see the before-and-after size on every file.
OpenPlaceholder Image Generator
A dummy image in any size, colour and text, ready to download, copy or paste into your HTML.
OpenPNG to JPG Converter
Shrink heavy PNGs into JPGs. Pick the quality and the colour behind any transparency, all on your device.
OpenWebP to JPG Converter
Turn WebP images into JPGs that open anywhere. Pick the quality, and your files never leave your device.
Open
Brain & reflex tests
Why utilyfe
- Private
- Your text stays in this browser tab. Nothing is uploaded, logged or saved.
- Fast
- Nothing to install and no waiting on a server. Results change as you type.
- Free
- No account to create and no daily limits. Open a tool and use it.