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Practical guides for real tasks — written by the people building the tools on this site.
Showing 2,437–2,457 of 2,462 articles
💻 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.
🔀 Data & CSV
Turn Delimited Text Into a Clean CSV
Convert pipe, comma, tab, or space delimited text into CSV with renameable columns and a live preview before you download. Free and runs in your browser.
🔀 Data & CSV
Turn SQL INSERT Statements Into a CSV File
Extract column names and row values from SQL INSERT INTO statements and convert them straight to CSV, without spinning up a database. Free and browser-based.
🔍 SEO & Web
How to Untangle a Long HTTP Redirect Chain
Paste a traced HTTP redirect chain and get each hop explained in plain language, with SEO warnings for long or mixed-type chains, right in your browser.
🎲 Generators
How to Use a Random Animal Generator
Generate a random animal with a real fact, filterable by mammals, birds, marine life, reptiles, or insects, for classrooms, icebreakers, and games.
🔀 Data & CSV
View a GPX File's Route, Distance & Elevation
See a GPX track's route shape, total distance, and elevation gain and loss from an uploaded .gpx file, without installing GPS software. Free and browser-based.
🎲 Generators
How to Write Blog Titles That Get Clicked
Turn a keyword into dozens of proven blog title formats — listicles, guides, and curiosity angles — so you stop staring at a blank headline field.