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Practical guides for real tasks — written by the people building the tools on this site.
Showing 2,353–2,373 of 2,462 articles
📄 PDF Tools
How to Edit or Remove a PDF's Metadata
View and edit a PDF's title, author, subject, and keywords, or clear them all at once, right in your browser, before sharing a document publicly.
🍷 Health & Fitness
How to Estimate BAC With the Widmark Formula
Estimate blood alcohol concentration using the Widmark formula from weight, sex, drinks, and time elapsed. An educational estimate only, not a legal reading.
📊 Social Media
How to Estimate Social Media Reach and Impressions
Estimate engagement rate, reach, and impressions from your follower count and engagement numbers, across Instagram, TikTok, X, and Facebook, right in your browser.
🎓 Education
How to Fairly Pick Random Students in Class
Pick a random student from your roster fairly, with an option to avoid repeats, so cold calling feels even instead of biased toward the same few names.
🎨 Design & Color
How to Find the Name of Any Hex Color
Find the closest of the 148 standard CSS color names for any hex color, with exact-match detection, right in your browser, without a slow manual color chart search.
🔢 Math & Science
How to Find the Pattern in a Number Sequence
Detect arithmetic, geometric, Fibonacci-like, or quadratic patterns in a number sequence and predict the next terms, with the logic behind each pattern type explained.
🎮 Social Media
How to Format Bold, Italic & Spoiler Text on Discord
Format Discord messages with bold, italic, underline, strikethrough, code blocks, spoiler tags, and headings using Discord's markdown syntax, ready to paste in.
🔳 Design & Color
How to Generate a Custom CSS Dot Grid Background
Generate an adjustable CSS dot grid background with custom spacing, size, and colors, then export it as CSS or a downloadable PNG tile for any project.
💻 Developer Tools
How to Generate a Mock JSON API Response
Build a mock JSON API response — array, object, or paginated — from a simple field list with typed fake values, right in your browser, no backend needed.
🫧 Developer Tools
How to Generate a Random SVG Blob Shape
Generate a random, smooth organic blob shape as SVG using a Catmull-Rom spline, with adjustable points and randomness, right in your browser, ready for design.
🎛️ Design & Color
How to Generate Neumorphic Soft-UI CSS
Generate neumorphic soft-UI box-shadow CSS with a live preview — flat or pressed, adjustable distance, blur, and intensity — right in your browser.
📝 Text & Writing
How to Join a List Into a Comma-Separated String
Join a line-by-line list into one comma-separated string with a chosen separator, optional quoting, and a natural 'and' before the last item, right in your browser.
✅ Productivity
How to Keep a To-Do List Without an Account
Add, check off, filter, and clear tasks with a fast to-do list saved to your device only, with no account, sign-up, or sync required.
💻 Developer Tools
How to Look Up ASCII Codes Fast
Browse the full 0-127 ASCII table with decimal, hex, and octal codes, searchable by character or code, right in your browser, without a static reference image.
🌐 Network
How to Look Up the Network Behind an IP Address
Learn what an ASN lookup actually tells you about the network behind an IP address, why the data lives in routing registries, and how to read the result.
🖼️ Image
How to Make a Framed Profile Picture Online
Crop a photo to a circle or rounded square, add a colored ring and an optional corner badge, and download it as a PNG, right in your browser.
✍️ Education
How to Make a Handwriting Practice Worksheet Fast
Generate a printable handwriting practice worksheet with ruled tracing lines from any word or phrase, useful for name practice, spelling lists, or letter drills.
⚖️ Productivity
How to Make a Weighted Pros and Cons List
Build a pros and cons list with per-item weights and get an instant weighted verdict as you edit, right in your browser, for decisions that aren't a simple coin flip.
🎓 Education
How to Make Digital Flashcards for Studying
Build a flashcard deck, flip through it to study, and shuffle the order, saved to your device only, without a study app account or subscription.
🎵 Video & Audio
How to Merge Multiple Audio Tracks Into One File
Merge two or more audio files into a single reorderable MP3 using FFmpeg compiled to WebAssembly, right in your browser, without a full audio editor.
🎵 Design & Color
How to Mock Up Album Art Before You Release It
Preview your album artwork as a vinyl sleeve, CD jewel case, or streaming app tile before you upload it, so you catch cropping and legibility issues early.