Dimensions & Ratio Width (px) Height (px) 🔓 Lock Ratio Ratio unlocked 16:9 Aspect Ratio Common Ratio Presets 16:9 4:3 1:1 21:9 9:16 3:2 2:3 5:4 18:9 Resolution Presets 1080p (FHD) 720p (HD) 4K (UHD) 8K Instagram Square Instagram Portrait Twitter/X Card YouTube Thumbnail 1440p (QHD) 2K Visual Preview 16:9 Info 2,073,600 Total Pixels 2.07 MP Megapixels 1.778 Decimal Ratio Code Snippets CSS HTML Tailwind Copy Resize images → Image Resizer Social media sizes → Social Media Image Resizer ...

Aspect Ratio Crop Calculator Original Image Size (pixels) ...

Barcode Settings Barcode Type Code 128 (most versatile) Code 39 EAN-13 Data / Value ...

Text Encoder / Decoder Input AUTO-DETECT 0 chars Encode Decode Clear URL-safe mode (+/ → -_) Auto-detect mode Output as data URI ⇅ Swap Input / Output Output 0 chars Copy Output File to Base64 📄 Drag & drop a file here, or click to browse Choose File Include data URI prefix (e.g. data:image/png;base64,...) What is Base64 Encoding? Base64 is a binary-to-text encoding scheme that represents binary data using a set of 64 printable ASCII characters (A–Z, a–z, 0–9, +, and /), with = used for padding. The name comes from the 64 characters used in the alphabet. Each Base64 character encodes exactly 6 bits of binary data, meaning every 3 bytes of input become 4 Base64 characters — increasing the data size by approximately 33%. Base64 was standardized in RFC 4648 and is universally supported across programming languages, browsers, and operating systems. ...

Free, in-browser Base64 to image decoder. Paste any Base64 string — with or without a data URI prefix — and instantly preview, inspect, and download the decoded image. No upload, no server, no sign-up required. Paste Base64 String ▶ Decode & Preview Load Sample ✕ Clear Format: — Dimensions: — Decoded size: — ↓ Download Image 📋 Copy as Data URI How it works Paste a Base64-encoded string into the text area above. The tool automatically strips any data:image/...;base64, prefix and removes whitespace/newlines. It decodes the string in your browser, detects the image format (PNG, JPEG, GIF, WebP, SVG…), and renders a live preview. Inspect the detected format, pixel dimensions, and decoded file size. Download the image file or copy the full data URI to your clipboard. ← Image to Base64 Base64 Encoder Related Tools Base64 Encoder Encoder Decoder Hash Generator ...

Battery Life Calculator Instantly estimate how long your device will run on a single charge — or find out what battery capacity you need for a target runtime. Works for smartphones, laptops, tablets, IoT sensors, drones, and more. ...

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Number Converter Text → Binary Binary → Text Number Base Converter Binary (Base 2) Octal (Base 8) Decimal (Base 10) Hexadecimal (Base 16) Binary (Base 2) — Copy Octal (Base 8) — Copy Decimal (Base 10) — Copy Hexadecimal (Base 16) — Copy Bit Manipulation Display 8-bit 16-bit 32-bit Two's Complement (Negative Number) Text → Binary Input Text Binary Output (8-bit per character) Copy Binary Clear Binary → Text Input Binary (space-separated 8-bit groups) Text Output Copy Text Clear Related: Hash your data with Hash Generator ...

Body Fat Calculator Male Female Height cm Weight kg Waist cm Neck cm Hip cm Age yrs Calculate Body Fat ...

A bookmarklet is a bookmark that runs JavaScript on any page. Paste your JS code below, click Convert, drag it to your bookmark bar, and it works instantly — no extensions needed. JavaScript Code Paste your JavaScript here Minify (remove comments & whitespace) URI encode Wrap in IIFE (void function(){...}()) Convert to Bookmarklet Clear Test in Console Bookmarklet Output Copy Characters: 0 Size: 0 B Status: — Drag this button to your bookmark bar: Bookmarklet (Show your bookmark bar: Ctrl+Shift+B / Cmd+Shift+B) Ready-to-Use Examples Highlight Links Dark Mode Toggle Font Size Changer Print Page Scroll to Top Word Count Copy Page URL+Title Related Tools: Code Minifier URL Encoder How to Use a Bookmarklet Paste your JavaScript into the code area above (or pick an example). Click Convert — the tool wraps your code in a javascript: URI. Drag the generated button to your browser’s bookmark bar. Visit any page and click the bookmark — your script runs instantly. Tips Minify strips comments and whitespace, keeping the URL short. IIFE wrap prevents your variables from polluting the page’s global scope. URI encode is required for special characters like spaces, quotes, and ampersands. Most browsers cap bookmarklet URLs at ~2 KB — keep scripts lean. Use alert() or console.log() to debug output during testing. Related Tools Code Minifier — Minify JS, CSS, and HTML files. URL Encoder — Encode/decode URL components manually.