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Practical guides for real tasks — written by the people building the tools on this site.
Showing 2,542–2,562 of 2,573 articles
🎧 Video & Audio
How to Extract MP3 Audio From a Video File
Pull the audio track out of an MP4 or MOV and save it as an MP3 without installing an editor. What actually happens during extraction and how to do it in your browser.
🎲 Generators
How to Find a Gift Idea When You're Stuck
Get a gift idea filtered by interest and budget for any recipient, when you're out of ideas and running out of time before the occasion.
📅 Date & Time
Find the Moon Phase for Any Date
Calculate the moon phase, cycle age, and approximate illumination percentage for any date, past or future, without an astronomy app. Free and instant.
💻 Developer Tools
How to Clean Up Minified or Messy CSS Fast
Reformat minified or messy CSS into clean, consistently indented stylesheets that preserve comments, live as you type, without installing a build tool.
🎲 Generators
How to Generate a Random Excuse for Fun
Get a random, category-filtered excuse for work, school, or social plans, for games, icebreakers, or a laugh — not for actually skipping anything.
🎲 Generators
How to Generate a Secure Random PIN
Create random numeric PINs of any length, in batches, with an optional no-repeated-digits mode, for accounts, devices, and shared codes.
💻 Developer Tools
How to Generate an HMAC Signature Online
Compute HMAC-SHA1, SHA256, SHA384, or SHA512 signatures from a message and secret key using the Web Crypto API, output in hex or Base64, in your browser.
🔒 Security & Privacy
How to Generate an RSA Key Pair in Your Browser
Generate a 2048 to 4096-bit RSA public/private key pair in PEM format for signing or encryption, entirely in your browser with the Web Crypto API.
🎲 Generators
How to Generate Fake Test Data for Your App
Generate rows of fake names, emails, phone numbers, and companies as CSV or JSON for testing forms, seeding a database, or building a demo.
🔍 SEO & Web
How to Generate JSON-LD Schema Markup Without a Developer
Generate valid JSON-LD structured data for Article, FAQPage, and Product schema by filling in a form, live, with no developer needed and nothing uploaded.
💻 Developer Tools
How to Generate SEO and Social Meta Tags Fast
Generate title, description, robots, canonical, Open Graph, and Twitter Card meta tags ready to paste into your page head, without memorizing the syntax.
🎲 Generators
How to Get Random Sentences for Typing Practice
Generate random, grammatically complete English sentences for typing drills, writing prompts, or language practice, with fresh sentences every time.
🎲 Generators
How to Get Test Credit Card Numbers for Testing
Generate Luhn-valid, non-real credit card numbers by network to test payment forms and checkout flows without risking a real card.
🔒 Security & Privacy
How to Grade Security Headers and Spot the WAF Behind Them
Paste a site's response headers to get a security header grade and identify the WAF or CDN provider protecting it, entirely in your browser.
📅 Date & Time
Make a Printable Calendar for Any Month
Generate a printable monthly calendar for any month and year, with a Monday- or Sunday-first week and today highlighted. Free, no design software needed.
🎲 Generators
How to Make a Professional Email Signature
Build an HTML email signature with your name, title, and contact details that pastes cleanly into Gmail or Outlook, without fighting broken formatting.
✍️ Text & Writing
How to Make Fancy Fonts for Your Instagram Bio
Turn plain text into bold, italic, script, and other decorative Unicode fonts that paste anywhere, no app install or design skill needed. Free and browser-based.
📅 Date & Time
Set a Reliable Alarm Right in Your Browser
Set a browser-tab alarm for any time of day and get an on-screen alert with sound when it rings, no app install or account needed. Free and instant.
💰 Finance Calculators
How to Size a Trade From Your Risk Percentage
Calculate the right share or unit size for a trade from your account balance, risk percentage, entry price, and stop-loss, without over-risking your account.
📄 PDF Tools
How to Split a PDF Into Separate Files for Free
Split a PDF into individual pages or page ranges without installing software or emailing a file to a converter site. A practical walkthrough plus what to check first.
🔀 Data & CSV
Turn a Spreadsheet Paste Into JSON
Convert tab-separated (TSV) data copied from a spreadsheet into a JSON array of objects or arrays, ready to paste into code. Free and browser-based.