Practical guides on file conversion, JSON, PDFs, passwords, and more. Everything is free, privacy-focused, and runs in your browser.
Press Ctrl+V and your screenshot becomes a PDF in seconds — entirely in your browser. No upload, no account, no software needed.
A complete guide to downloading YouTube thumbnails in all resolutions — plus why HD sometimes shows grey and how to fix it.
Instant JSON validation with exact error location — plus auto-repair for trailing commas, single quotes, and unquoted keys.
°F = (°C × 9/5) + 32 — with a reference table for common temperatures, mental math shortcuts, and a free instant converter.
No Adobe Acrobat needed. Get word-level PDF comparison — additions highlighted green, removals red, similarity score shown instantly.
Reduce JPG, PNG, and WebP file sizes by up to 90% in your browser. Batch compress multiple images at once. Nothing leaves your device — no server, no account.
37°C = 98.6°F — normal human body temperature. Is 37°C a fever? What's the normal range? Fever thresholds in Celsius and Fahrenheit explained.
100°C = 212°F — boiling point of water at sea level. Why does altitude change this? Full cooking temperature chart from 100°C to 230°C.
Type any °F and get °C instantly. Formula: °C = (°F − 32) × 5/9. Chart with 21 common temperatures — body temp, room temp, boiling point, oven temps.
Reduce image file sizes by up to 90% with no visible quality difference. Step-by-step guide with exact quality settings for JPG, PNG, and WebP. Browser-based, nothing uploaded.
Generate QR codes for URLs, WiFi, contacts, WhatsApp, email, and 16 other types. Custom colors, add a logo, download PNG/SVG. No signup, no watermark, nothing uploaded.
Encode text and files to Base64, decode Base64 strings, and inspect JWT tokens with expiry check. Covers Kubernetes secrets, Basic Auth headers, URL-safe Base64, and data URIs. Free, browser-based, nothing uploaded.
Minify CSS and JavaScript to reduce file size, or beautify minified code for readability. Covers all options: remove comments, strip console.log, normalize colors, shorten zeros. Plus when to use a build tool instead.
Compare two texts line by line, word by word, or character by character. Covers diff modes, view options, similarity scoring, unified patch format, JSON comparison, and real-world use cases. Free, nothing uploaded.
Paste JSON and download CSV in seconds. Supports nested objects, arrays, Excel export, and custom delimiters. Includes Python & JavaScript code examples. 100% browser-based.
Paste any minified CSS or JavaScript and get properly indented, readable code instantly. Covers what unminifying does, where to find minified stylesheets, and what a beautifier cannot recover. Free, nothing uploaded.
Strip all console.log, console.warn, and console.error from JavaScript instantly online, or automatically via webpack, Vite, esbuild, and Terser. Covers security risks, performance impact, and every removal method.
Convert HEX to RGB, RGB to HEX, HSL, CMYK instantly. Includes formulas, reference tables, Tailwind/iOS/Flutter formats, and a free browser-based color converter. No signup, nothing uploaded.
What makes a WiFi password strong: 16+ characters, genuinely random, no dictionary words. Real examples at every strength level, the entropy math, and an 8 vs 12 vs 16 vs 20 comparison.
150+ WiFi password ideas — funny, clever, pop culture, nerdy, and food-themed. Plus: matching SSID + password combos and how to make any idea actually secure.
Complete guide to WCAG color contrast requirements — the formula, minimum ratios for normal and large text, AA vs AAA explained, and how to fix failing pairs.
Free online color picker — pick any color, generate palettes, extract colors from images, build CSS gradients, check contrast, and convert HEX, RGB, HSL instantly. No signup, 100% in your browser.
ChatGPT and other LLMs often output invalid JSON with trailing commas, single quotes, unquoted keys, or markdown wrappers. Learn how to repair malformed JSON instantly, prevent parse errors, and validate AI-generated JSON safely in your browser.
Roll virtual dice, flip a coin, pick a random winner from a list, or draw Powerball/Mega Millions numbers — cryptographically secure, free, instant.
What percent-encoding and HTML entity encoding actually do, when you need each one, and how encodeURIComponent differs from htmlspecialchars.
Convert length, weight, speed, volume, data storage, pressure and energy instantly — 80+ units, one free browser-based converter.
100+ hotspot password and name ideas — funny, clever, and secure. Plus why your phone's default is weak, how to change it on iOS and Android, and how to stop people leeching your data.
Guest WiFi password and network name ideas for homes, Airbnbs, cafés, and offices. The common guest passwords to avoid, how to set up a separate guest network, and when to rotate it.