25 free online tools, no sign-up

Free online tools that work instantly in your browser: color converters, QR code generator, password generator, calculators, text tools, CSS generators and more. No sign-up, no installs, nothing uploaded.

Color Tools

Free browser-based color tools: convert HEX, RGB, HSL and more, pick colors, build gradients and check WCAG contrast ratios.

Color Converter Paste a color in any common format and get every other format back instantly, along with a live preview and a generated set of tints and shades. Color Contrast Checker Enter a text color and a background color to get the exact contrast ratio, plus a clear pass or fail against every WCAG 2.1 level. Color Color Picker Pick a color visually, refine it with precise sliders, and copy it in whichever notation your project needs. Color Gradient Generator Design a gradient visually and copy the CSS. Linear and radial, unlimited color stops, live full-width preview. Color

Design Tools

Free design tools that run in your browser: font pairing preview, device mockup generator, placeholder text and images, and a sketch pad.

Font Pairing Test how a heading font and a body font look together, using your own copy rather than a generic pangram. Design Sketch Pad Draw directly in your browser with adjustable brushes and colors, then download the result as a PNG. Design Placeholder Generator Generate placeholder text by paragraph, sentence or word count, and placeholder images at any dimensions you need. Design Device Mockup Drop in a screenshot, pick a device frame, and download a presentation-ready mockup as a PNG. Design

Developer Tools

Free developer tools in your browser: JSON formatter and validator, regex tester, CSS box shadow generator and CSS animation builder.

Box Shadow Generator Dial in a box shadow and border radius with sliders, watch the preview update, and copy the CSS. Developer CSS Animation Generator Pick an animation, tune the timing, and copy complete CSS including the keyframes. Developer JSON Formatter Paste JSON to format it, validate it, or minify it. Errors are reported with the exact line and position. Developer Regex Tester Write a regular expression and see every match highlighted in your test text as you type, with capture groups broken out. Developer

Calculators

Free online calculators: loan and interest payments, BMI and healthy weight range, tips and bill splitting, plus a universal unit converter.

Unit Converter Convert between units across eight categories, from centimetres and inches to gigabytes and gibibytes. Calculators BMI Calculator Calculate your Body Mass Index in metric or imperial units and see the healthy weight range for your height. Calculators Tip Calculator Enter the bill, pick a tip percentage, and see the tip, the total and the amount each person owes. Calculators Loan Calculator Calculate the monthly payment, total interest and full cost of a loan, with a year-by-year amortization breakdown. Calculators

Generators

Free online generators: QR code generator, strong password generator, random username generator and a random picker for making decisions.

QR Code Generator Turn a link or any text into a QR code, customize the colors, and download it as a high-resolution PNG. No watermark and no expiry. Generators Password Generator Generate a strong random password using your browser cryptographic random number generator. Nothing is sent anywhere. Generators Username Generator Generate batches of username ideas in different styles, from clean and professional to gaming handles. Generators Random Picker Paste a list of options, one per line, and get a genuinely random pick. Useful for giveaways, standup order or settling an argument. Generators

Text Tools

Free text tools: change case and analyse text, compare two documents line by line, and convert Markdown to clean HTML with live preview.

Text Converter Transform text between a dozen case formats and get live word, character and reading-time counts as you type. Text Text Diff Paste two versions of a text and see precisely what changed between them, highlighted line by line and word by word. Text Markdown to HTML Write or paste Markdown on the left and get a live preview plus clean, copyable HTML on the right. Text

Productivity Tools

Free productivity tools: a Pomodoro timer with stopwatch and lap times, and a budget and expense tracker that saves data in your browser.

Pomodoro Timer A Pomodoro timer with configurable work and break lengths, plus a stopwatch with lap times. Both keep accurate time in a background tab. Productivity Budget Tracker Track income and expenses against a monthly budget, with category breakdowns. Everything is stored in your own browser. Productivity