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Practical guides for real tasks — written by the people building the tools on this site.
Showing 1,618–1,638 of 2,464 articles
🧱 Developer Tools
How to Write Accessible HTML Table Markup
Build HTML tables with proper thead, tbody and scope attributes so screen readers announce data correctly, and know when a table is the wrong element.
✍️ Generators
How to Write an Offer Letter People Accept
Put the commercial terms, conditions and deadline in an employment offer letter clearly, so a candidate can say yes without a round of clarifying emails.
🌐 Network
How to Write DNS Records That Actually Work
Format A, CNAME, MX, SPF and CAA records correctly, including the trailing dot and single-SPF rules that break more setups than anything else.
🚗 Finance Calculators
Lease vs Buy Calculator: Which Costs Less?
Compare the real total cost of leasing versus buying a car — down payment, monthly payments, mileage fees, and resale value — free in your browser.
🏠 Finance Calculators
Rent vs Buy Calculator: How to Actually Decide
Use a rent vs buy calculator to compare the real long-run cost of renting and owning, including opportunity cost and closing costs, free in your browser.
☕ Finance Calculators
What Your Daily Coffee Really Costs Over 10 Years
Put a real number on the latte factor. See what a small daily habit adds up to over years, and why the honest version of this calculation is more useful than the viral one.
⚖️ Health & Fitness
When Will You Reach Your Goal Weight?
Estimate the date you'll hit a target weight at your current rate of change, and learn why a realistic pace beats an aggressive one when you plan around a deadline.
📄 Unit Converters
A4 vs Letter: Paper Sizes in Every Unit
Look up A4, Letter, Legal, and other common paper sizes in millimeters, inches, and pixels at any resolution, with a scaled visual preview to compare them.
💰 Finance Calculators
How a 401(k) Contribution Change Hits Your Paycheck
See exactly how raising your 401(k) contribution percentage changes your take-home pay and annual savings, including your employer's match, before you touch HR.
🏠 Finance Calculators
How Long It Takes to Save a Home Down Payment
Calculate how many months it will take to reach a home down payment goal from your current savings and monthly contribution, before you start house hunting.
🏢 Finance Calculators
How Much Rent Can You Actually Afford?
Calculate a recommended maximum rent from gross income using the 30%, 25%, or 28/36 rule of thumb, with debt-load warnings built into the result.
📄 PDF Tools
How to Add a Header and Footer to Every PDF Page
Add custom header and footer text to every page of a PDF, with page-number placeholders, and save the result, without a full document editing suite.
🌗 Image
How to Add a Soft Vignette Effect to a Photo
Add an adjustable vignette effect to a photo, darkening the edges while keeping the center bright, and download the result as a PNG.
©️ Video & Audio
How to Add a Text Watermark to Your Video
Add a text watermark to any video in a chosen corner, rendered live and exported as a downloadable video, to protect your work or brand a clip.
📄 PDF Tools
How to Add Bookmarks to a PDF
Use a PDF bookmark editor to read, edit, nest, and write outline bookmarks with UTF-16 titles and seed-from-page-text shortcuts.
📅 Date & Time
How to Add Days or Months to a Date
Use a date adder to add or subtract years, months, weeks, days, and hours with month overflow, working days, and clock changes handled.
🧾 Finance Calculators
How to Add or Remove VAT From a Price
Use a VAT calculator to add VAT to net prices or remove VAT from gross totals, showing the net, VAT amount, and final gross price.
🖼️ Image Tools
How to Adjust Photo Brightness and Contrast
Use a brightness and contrast editor to adjust exposure, midtones, saturation, histogram shape, and clipped pixels in your browser.
🎞️ Video & Audio
How to Apply a Color Grade to Video Without an Editor
Apply a warm, cool, vintage, black & white, or faded color filter to a video and export the result, without opening full video editing software.
🖼️ Image Tools
How to Use a Bulk Image Converter
Learn how to convert multiple images to PNG, JPG, or WEBP in one browser session, avoid format mistakes, and download the results as a ZIP.
🎨 Design & Color
How to Blend Two Hex Colors at Any Ratio
Mix two HEX colors at any ratio using linear-light blending for a natural-looking result, with instant HEX and RGB output for design work in your browser.