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Practical guides for real tasks — written by the people building the tools on this site.
Showing 2,332–2,352 of 2,462 articles
💻 Developer Tools
How to Choose an Open-Source License for Your Project
Get a suggested open-source license — MIT, Apache 2.0, MPL-2.0, GPLv3, or PolyForm Noncommercial — from three quick questions, right in your browser.
💰 Finance Calculators
How to Compare Roth vs Traditional Retirement Accounts
Compare the after-tax future value of Roth and Traditional retirement contributions based on your tax rates and expected return, right in your browser.
🎬 Video & Audio
How to Compress a Video Without Losing Quality
Shrink a video's file size in your browser using FFmpeg compiled to WebAssembly, so it fits an upload limit or email attachment without visible quality loss.
🌙 Design & Color
How to Turn a Light CSS Palette Into Dark Mode
Convert a light-theme CSS color palette into a working dark mode by inverting lightness while keeping hue and saturation, without redesigning every color by hand.
📚 PDF Tools
How to Convert a PDF Into an FB2 eBook File
Convert a text-based PDF into a valid FB2 FictionBook e-book file with custom title and author, so it opens properly in FB2-compatible e-readers.
🖼️ Image
How to Convert a Photo Into a Vector SVG
Turn a raster photo into a scalable, posterized SVG using adjustable color and detail levels, entirely in your browser with no software install.
🩸 Health & Fitness
How to Convert A1C to Average Blood Glucose
Turn an A1C percentage into estimated average glucose (eAG) in mg/dL or mmol/L using the ADAG study formula, and see what the number does and doesn't tell you.
📖 PDF Tools
How to Convert an EPUB eBook Into a PDF
Convert an EPUB file's chapter text into a plain, paginated PDF by reflowing the text, so you can read or print it anywhere a PDF works but EPUB doesn't.
🎧 Video & Audio
How to Convert Audio Between MP3, WAV, and FLAC
Convert audio files between MP3, WAV, OGG, FLAC, and M4A in your browser when an app rejects a format, without installing desktop audio conversion software.
📶 Unit Converters
How to Convert Hz, kHz, MHz, and RPM
Convert frequency between millihertz, hertz, kilohertz, megahertz, gigahertz, and RPM with every unit shown at once, right in your browser.
🖼️ Image
How to Convert JFIF Images to WebP
Convert JFIF or JPEG images to WebP format with an adjustable quality slider and instant preview, right in your browser, no unfamiliar file extension confusion.
🧩 SEO & Web
How to Convert JSON-LD Schema Into Microdata
Convert JSON-LD structured data into equivalent Microdata itemscope and itemprop HTML markup for platforms or templates that only support inline attributes.
⚖️ Unit Converters
How to Convert Kilograms to Pounds and Back
Convert weight between kilograms, pounds, ounces, and stones with every unit shown at once, for shipping labels, recipes, or fitness tracking across unit systems.
🥛 Unit Converters
How to Convert Liters, Gallons, and Cups
Convert volume between milliliters, liters, cups, gallons, and more with every unit shown at once, for recipes, fuel economy, or lab measurements across unit systems.
💡 Unit Converters
How to Convert Lumens, Lux, and Candela Correctly
Convert between lumens, lux, candela, and foot-candles without mixing up light output and illuminance. A guide to picking the right light unit converter.
⛽ Unit Converters
How to Convert MPG to L/100km (and Back)
Convert fuel economy between US MPG, UK MPG, L/100km, and km/L so you can compare cars, rentals, and spec sheets across countries without guessing at the math.
🔧 Unit Converters
How to Convert Newton-Meters to Foot-Pounds
Convert torque between Newton-meters and foot-pounds instantly for a torque wrench spec, a repair manual, or an engineering assignment, with both units synced live.
🔷 Design & Color
How to Create Seamless SVG Background Patterns
Generate seamless dots, stripes, grid, zigzag, or triangle patterns as SVG with a live preview and CSS-ready output, right in your browser, no design app needed.
💻 Developer Tools
How to Design a Custom CSS Easing Curve
Visually design a CSS cubic-bezier() timing function by dragging control points, with a live animation preview, right in your browser, no guessing coordinates.
🔍 Text & Writing
How to Find Hidden Characters Lurking in Pasted Text
Detect zero-width spaces, non-breaking spaces, and other invisible Unicode characters hiding in pasted text, or copy them intentionally when you need one.
🌀 Games & Fun
How to Draw Spirograph Patterns Online for Free
Generate classic Spirograph-style hypotrochoid curves by adjusting ring, wheel, and pen offset values, then export the pattern as SVG for print or design work.